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src/index.ts

Summary

Maintainability
F
1 wk
Test Coverage
A
99%

File index.ts has 542 lines of code (exceeds 250 allowed). Consider refactoring.
Open

import {
  IDENTITY,
  COMPARE,
} from "extra-function";
import {
Severity: Major
Found in src/index.ts - About 1 day to fix

    Function cartesianProduct has a Cognitive Complexity of 10 (exceeds 5 allowed). Consider refactoring.
    Open

    export function* cartesianProduct<K, V, W=Map<K, V>>(xs: Map<K, V>[], fm: MapFunction<number, Map<K, V>, Map<K, V>|W> | null=null): IterableIterator<Map<K, V>|W> {
  var fm = fm || IDENTITY;
  var XS = xs.length;
  var kx = xs.map(x => [...x.keys()]);
  var ls = kx.map(ks => ks.length);
    Severity: Minor
    Found in src/index.ts - About 1 hr to fix

    Cognitive Complexity

    Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

    A method's cognitive complexity is based on a few simple rules:

    • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
    • Code is considered more complex for each "break in the linear flow of the code"
    • Code is considered more complex when "flow breaking structures are nested"

    Further reading

    Function intersectionKeys has a Cognitive Complexity of 8 (exceeds 5 allowed). Consider refactoring.
    Open

    export function intersectionKeys<K, V>(...xs: Map<K, V>[]): Set<K> {
  var a = new Set<K>();
  if (xs.length===0) return a;
  var x = xs[0], ys = xs.slice(1);
  LOOPX: for (var k of x.keys()) {
    Severity: Minor
    Found in src/index.ts - About 45 mins to fix

    Cognitive Complexity

    Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

    A method's cognitive complexity is based on a few simple rules:

    • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
    • Code is considered more complex for each "break in the linear flow of the code"
    • Code is considered more complex when "flow breaking structures are nested"

    Further reading

    Function flatTo$ has 5 arguments (exceeds 4 allowed). Consider refactoring.
    Open

    function flatTo$<K>(a: Map<K, any>, x: Map<K, any>, n: number, fm: MapFunction<K, any, any>, ft: TestFunction<K, any>): Map<K, any> {
    Severity: Minor
    Found in src/index.ts - About 35 mins to fix

      Function compare has a Cognitive Complexity of 7 (exceeds 5 allowed). Consider refactoring.
      Open

      export function compare<K, V, W=V>(x: Map<K, V>, y: Map<K, V>, fc: CompareFunction<V|W> | null=null, fm: MapFunction<K, V, V|W> | null=null): number {
  var fc = fc || COMPARE;
  var fm = fm || IDENTITY;
  var ks = unionKeys(x, y);
  for (var k of ks) {
      Severity: Minor
      Found in src/index.ts - About 35 mins to fix

      Cognitive Complexity

      Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

      A method's cognitive complexity is based on a few simple rules:

      • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
      • Code is considered more complex for each "break in the linear flow of the code"
      • Code is considered more complex when "flow breaking structures are nested"

      Further reading

      Function zip has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
      Open

      export function zip<K, V, W=V>(xs: Map<K, V>[], fm: MapFunction<K, V[], V[]|W> | null=null, fe: EndFunction=null, vd?: V): Map<K, V[]|W> {
  var fm = fm || IDENTITY;
  var fe = fe || arraySome as EndFunction;
  var ks = unionKeys(...xs), a = new Map();
  for (var k of ks) {
      Severity: Minor
      Found in src/index.ts - About 25 mins to fix

      Cognitive Complexity

      Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

      A method's cognitive complexity is based on a few simple rules:

      • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
      • Code is considered more complex for each "break in the linear flow of the code"
      • Code is considered more complex when "flow breaking structures are nested"

      Further reading

      Function hasSubset has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
      Open

      export function hasSubset<K, V, W=V>(x: Map<K, V>, y: Map<K, V>, fc: CompareFunction<V|W> | null=null, fm: MapFunction<K, V, V|W> | null=null): boolean {
  var fc = fc || COMPARE;
  var fm = fm || IDENTITY;
  for (var [k, v] of y) {
    if (!x.has(k)) return false;
      Severity: Minor
      Found in src/index.ts - About 25 mins to fix

      Cognitive Complexity

      Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

      A method's cognitive complexity is based on a few simple rules:

      • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
      • Code is considered more complex for each "break in the linear flow of the code"
      • Code is considered more complex when "flow breaking structures are nested"

      Further reading

      Similar blocks of code found in 2 locations. Consider refactoring.
      Open

      export function minEntry<K, V, W=V>(x: Map<K, V>, fc: CompareFunction<V|W> | null=null, fm: MapFunction<K, V, V|W> | null=null): [K, V] {
  return rangeEntries(x, fc, fm)[0];
}
      Severity: Major
      Found in src/index.ts and 1 other location - About 4 hrs to fix
      src/index.ts on lines 527..529

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 121.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Similar blocks of code found in 2 locations. Consider refactoring.
      Open

      export function maxEntry<K, V, W=V>(x: Map<K, V>, fc: CompareFunction<V|W> | null=null, fm: MapFunction<K, V, V|W> | null=null): [K, V] {
  return rangeEntries(x, fc, fm)[1];
}
      Severity: Major
      Found in src/index.ts and 1 other location - About 4 hrs to fix
      src/index.ts on lines 503..505

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 121.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Similar blocks of code found in 2 locations. Consider refactoring.
      Open

      export function min<K, V, W=V>(x: Map<K, V>, fc: CompareFunction<V|W> | null=null, fm: MapFunction<K, V, V|W> | null=null): V {
  return rangeEntries(x, fc, fm)[0][1];
}
      Severity: Major
      Found in src/index.ts and 1 other location - About 4 hrs to fix
      src/index.ts on lines 515..517

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 120.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Similar blocks of code found in 2 locations. Consider refactoring.
      Open

      export function max<K, V, W=V>(x: Map<K, V>, fc: CompareFunction<V|W> | null=null, fm: MapFunction<K, V, V|W> | null=null): V {
  return rangeEntries(x, fc, fm)[1][1];
}
      Severity: Major
      Found in src/index.ts and 1 other location - About 4 hrs to fix
      src/index.ts on lines 491..493

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 120.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Similar blocks of code found in 2 locations. Consider refactoring.
      Open

      export function searchAll<K, V>(x: Map<K, V>, ft: TestFunction<K, V>): K[] {
  var a = [];
  for (var [k, v] of x)
    if (ft(v, k, x)) a.push(k);
  return a;
      Severity: Major
      Found in src/index.ts and 1 other location - About 3 hrs to fix
      src/index.ts on lines 796..801

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 105.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Similar blocks of code found in 2 locations. Consider refactoring.
      Open

      export function findAll<K, V>(x: Map<K, V>, ft: TestFunction<K, V>): V[] {
  var a = [];
  for (var [k, v] of x)
    if (ft(v, k, x)) a.push(v);
  return a;
      Severity: Major
      Found in src/index.ts and 1 other location - About 3 hrs to fix
      src/index.ts on lines 822..827

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 105.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Identical blocks of code found in 3 locations. Consider refactoring.
      Open

      export function isEqual<K, V, W=V>(x: Map<K, V>, y: Map<K, V>, fc: CompareFunction<V|W> | null=null, fm: MapFunction<K, V, V|W> | null=null): boolean {
  return x.size===y.size && compare(x, y, fc, fm)===0;
}
      Severity: Major
      Found in src/index.ts and 2 other locations - About 2 hrs to fix
      src/index.ts on lines 236..249
      src/index.ts on lines 765..775

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 89.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Identical blocks of code found in 3 locations. Consider refactoring.
      Open

      export function compare<K, V, W=V>(x: Map<K, V>, y: Map<K, V>, fc: CompareFunction<V|W> | null=null, fm: MapFunction<K, V, V|W> | null=null): number {
  var fc = fc || COMPARE;
  var fm = fm || IDENTITY;
  var ks = unionKeys(x, y);
  for (var k of ks) {
      Severity: Major
      Found in src/index.ts and 2 other locations - About 2 hrs to fix
      src/index.ts on lines 260..262
      src/index.ts on lines 765..775

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 89.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Identical blocks of code found in 3 locations. Consider refactoring.
      Open

      export function hasSubset<K, V, W=V>(x: Map<K, V>, y: Map<K, V>, fc: CompareFunction<V|W> | null=null, fm: MapFunction<K, V, V|W> | null=null): boolean {
  var fc = fc || COMPARE;
  var fm = fm || IDENTITY;
  for (var [k, v] of y) {
    if (!x.has(k)) return false;
      Severity: Major
      Found in src/index.ts and 2 other locations - About 2 hrs to fix
      src/index.ts on lines 236..249
      src/index.ts on lines 260..262

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 89.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Similar blocks of code found in 2 locations. Consider refactoring.
      Open

      export function find<K, V>(x: Map<K, V>, ft: TestFunction<K, V>): V {
  for (var [k, v] of x)
    if (ft(v, k, x)) return v;
}
      Severity: Major
      Found in src/index.ts and 1 other location - About 2 hrs to fix
      src/index.ts on lines 810..813

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 84.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Similar blocks of code found in 2 locations. Consider refactoring.
      Open

      export function search<K, V>(x: Map<K, V>, ft: TestFunction<K, V>): K {
  for (var [k, v] of x)
    if (ft(v, k, x)) return k;
}
      Severity: Major
      Found in src/index.ts and 1 other location - About 2 hrs to fix
      src/index.ts on lines 784..787

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 84.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Identical blocks of code found in 3 locations. Consider refactoring.
      Open

      export function searchValue<K, V, W=V>(x: Map<K, V>, v: V, fc: CompareFunction<V|W> | null=null, fm: MapFunction<K, V, V|W> | null=null): K {
  var fc = fc || COMPARE;
  var fm = fm || IDENTITY;
  var w = fm(v, null, null);
  for (var [k, u] of x) {
      Severity: Major
      Found in src/index.ts and 2 other locations - About 2 hrs to fix
      src/index.ts on lines 736..738
      src/index.ts on lines 857..866

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 80.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Identical blocks of code found in 3 locations. Consider refactoring.
      Open

      export function hasValue<K, V, W=V>(x: Map<K, V>, v: V, fc: CompareFunction<V|W> | null=null, fm: MapFunction<K, V, V|W> | null=null): boolean {
  return searchValue(x, v, fc, fm)!==undefined;
}
      Severity: Major
      Found in src/index.ts and 2 other locations - About 2 hrs to fix
      src/index.ts on lines 838..846
      src/index.ts on lines 857..866

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 80.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Identical blocks of code found in 3 locations. Consider refactoring.
      Open

      export function searchValueAll<K, V, W=V>(x: Map<K, V>, v: V, fc: CompareFunction<V|W> | null=null, fm: MapFunction<K, V, V|W> | null=null): K[] {
  var fc = fc || COMPARE;
  var fm = fm || IDENTITY;
  var w  = fm(v, null, null), a = [];
  for(var [k, u] of x) {
      Severity: Major
      Found in src/index.ts and 2 other locations - About 2 hrs to fix
      src/index.ts on lines 736..738
      src/index.ts on lines 838..846

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 80.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Similar blocks of code found in 2 locations. Consider refactoring.
      Open

      export function difference<K, V>(x: Entries<K, V>, y: Entries<K, V>): Map<K, V> {
  return difference$(new Map(x), y);
}
      Severity: Major
      Found in src/index.ts and 1 other location - About 2 hrs to fix
      src/index.ts on lines 1370..1372

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 79.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Similar blocks of code found in 2 locations. Consider refactoring.
      Open

      export function symmetricDifference<K, V>(x: Entries<K, V>, y: Entries<K, V>): Map<K, V> {
  return symmetricDifference$(new Map(x), y);
}
      Severity: Major
      Found in src/index.ts and 1 other location - About 2 hrs to fix
      src/index.ts on lines 1346..1348

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 79.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Similar blocks of code found in 2 locations. Consider refactoring.
      Open

      export function keys<K, V>(x: Map<K, V>): IterableIterator<K> {
  return x.keys();
}
      Severity: Major
      Found in src/index.ts and 1 other location - About 1 hr to fix
      src/index.ts on lines 136..138

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 58.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Similar blocks of code found in 2 locations. Consider refactoring.
      Open

      export function values<K, V>(x: Map<K, V>): IterableIterator<V> {
  return x.values();
}
      Severity: Major
      Found in src/index.ts and 1 other location - About 1 hr to fix
      src/index.ts on lines 126..128

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 58.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Similar blocks of code found in 4 locations. Consider refactoring.
      Open

      export function union$<K, V>(x: Map<K, V>, y: Entries<K, V>, fc: CombineFunction<V> | null=null): Map<K, V> {
  var fc = fc || IDENTITY;
  for (var [k, v] of y) {
    if (!x.has(k)) x.set(k, v);
    else x.set(k, fc(x.get(k), v));
      Severity: Major
      Found in src/index.ts and 3 other locations - About 55 mins to fix
      src/index.ts on lines 1266..1268
      src/index.ts on lines 1314..1320
      src/index.ts on lines 1330..1337

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 53.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Similar blocks of code found in 4 locations. Consider refactoring.
      Open

      export function intersection<K, V>(x: Map<K, V>, y: Entries<K, V>, fc: CombineFunction<V> | null=null): Map<K, V> {
  var fc = fc || IDENTITY;
  var a  = new Map();
  for (var [k, v] of y)
    if (x.has(k)) a.set(k, fc(x.get(k), v));
      Severity: Major
      Found in src/index.ts and 3 other locations - About 55 mins to fix
      src/index.ts on lines 1266..1268
      src/index.ts on lines 1279..1286
      src/index.ts on lines 1330..1337

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 53.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Similar blocks of code found in 4 locations. Consider refactoring.
      Open

      export function union<K, V>(x: Entries<K, V>, y: Entries<K, V>, fc: CombineFunction<V> | null=null): Map<K, V> {
  return union$(new Map(x), y, fc);
}
      Severity: Major
      Found in src/index.ts and 3 other locations - About 55 mins to fix
      src/index.ts on lines 1279..1286
      src/index.ts on lines 1314..1320
      src/index.ts on lines 1330..1337

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 53.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Similar blocks of code found in 4 locations. Consider refactoring.
      Open

      export function intersection$<K, V>(x: Map<K, V>, y: Map<K, V>, fc: CombineFunction<V> | null=null): Map<K, V> {
  var fc = fc || IDENTITY, ks = [];
  for (var [k, u] of [...x]) {
    if (!y.has(k)) ks.push(k);
    x.set(k, fc(u, y.get(k)));
      Severity: Major
      Found in src/index.ts and 3 other locations - About 55 mins to fix
      src/index.ts on lines 1266..1268
      src/index.ts on lines 1279..1286
      src/index.ts on lines 1314..1320

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 53.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Similar blocks of code found in 2 locations. Consider refactoring.
      Open

          if (i===0 || fc(v, mv)<0) { mk = k; mu = u; mv = v; }
      Severity: Minor
      Found in src/index.ts and 1 other location - About 30 mins to fix
      src/index.ts on lines 561..561

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 45.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

      Similar blocks of code found in 2 locations. Consider refactoring.
      Open

          if (i===0 || fc(v, nv)>0) { nk = k; nu = u; nv = v; }
      Severity: Minor
      Found in src/index.ts and 1 other location - About 30 mins to fix
      src/index.ts on lines 560..560

      Duplicated Code

      Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

      Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

      When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

      Tuning

      This issue has a mass of 45.

      We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

      The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

      If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

      See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

      Refactorings

      Further Reading

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