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

export function * appendGen<T, U> (iterA: Iterable<T>, iterB: Iterable<U>): Iterable<T | U> {
  yield * iterA
  yield * iterB
}
Severity: Major
Found in src/lib/sync/generators.ts and 1 other location - About 1 hr to fix
src/lib/sync/generators.ts on lines 15..18

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 69.

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 * prependGen<T, U> (iterA: Iterable<T>, iterB: Iterable<U>): Iterable<T | U> {
  yield * iterB
  yield * iterA
}
Severity: Major
Found in src/lib/sync/generators.ts and 1 other location - About 1 hr to fix
src/lib/sync/generators.ts on lines 10..13

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 69.

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 isAsyncIterable<T> (obj: unknown): obj is AsyncIterable<T> {
  return typeof obj == 'object' && obj != null && Symbol.asyncIterator in obj
}
Severity: Major
Found in src/lib/utils.ts and 1 other location - About 1 hr to fix
src/lib/utils.ts on lines 18..20

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 67.

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 isSyncIterable<T> (obj: unknown): obj is Iterable<T> {
  return typeof obj == 'object' && obj != null && Symbol.iterator in obj
}
Severity: Major
Found in src/lib/utils.ts and 1 other location - About 1 hr to fix
src/lib/utils.ts on lines 22..24

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 67.

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 filterGen<T, U extends T> (iter: AsyncIterable<T>, func: IndexedTypePredicate<T, U>): AsyncIterable<U>
Severity: Major
Found in src/lib/async/generators.ts and 1 other location - About 1 hr to fix
src/lib/sync/generators.ts on lines 133..133

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 57.

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 filterGen<T, U extends T> (iter: Iterable<T>, func: IndexedTypePredicate<T, U>): Iterable<U>
Severity: Major
Found in src/lib/sync/generators.ts and 1 other location - About 1 hr to fix
src/lib/async/generators.ts on lines 158..158

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 57.

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

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

function * sliceNegPosGen<T> (iter: Iterable<T>, start: number, end: number): Iterable<T> {
  const buf = Array(start)
  let pos = 0
  let size = 0
  let num = end
Severity: Minor
Found in src/lib/sync/generators.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 sliceNegPosGen has a Cognitive Complexity of 10 (exceeds 5 allowed). Consider refactoring.
Open

async function * sliceNegPosGen<T> (iter: AsyncIterable<T>, start: number, end: number): AsyncIterable<T> {
  const buf = Array(start)
  let pos = 0
  let size = 0
  let num = end
Severity: Minor
Found in src/lib/async/generators.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 dropLastGen has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.
Open

export async function * dropLastGen<T> (iter: AsyncIterable<T>, num: number): AsyncIterable<T> {
  const buf = Array(num)
  let pos = 0
  let size = 0
  for await (const elem of iter) {
Severity: Minor
Found in src/lib/async/generators.ts - About 55 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 dropLastGen has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.
Open

export function * dropLastGen<T> (iter: Iterable<T>, num: number): Iterable<T> {
  const buf = Array(num)
  let pos = 0
  let size = 0
  for (const elem of iter) {
Severity: Minor
Found in src/lib/sync/generators.ts - About 55 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 filterGen<T> (iter: AsyncIterable<T>, func: AsyncIndexedPredicate<T>): AsyncIterable<T>
Severity: Minor
Found in src/lib/async/generators.ts and 1 other location - About 40 mins to fix
src/lib/sync/generators.ts on lines 134..134

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 49.

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 filterGen<T> (iter: Iterable<T>, func: IndexedPredicate<T>): Iterable<T>
Severity: Minor
Found in src/lib/sync/generators.ts and 1 other location - About 40 mins to fix
src/lib/async/generators.ts on lines 159..159

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 49.

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

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

export function * takeLastGen<T> (iter: Iterable<T>, num: number): Iterable<T> {
  const buf = Array(num)
  let pos = 0
  let size = 0
  for (const elem of iter) {
Severity: Minor
Found in src/lib/sync/generators.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 sliceGen has a Cognitive Complexity of 7 (exceeds 5 allowed). Consider refactoring.
Open

export function sliceGen<T> (iter: Iterable<T>, start: number, end?: number): Iterable<T> {
  if (start >= 0 && end == null) {
    return dropGen(iter, start)
  } else if (end == null) { // && start < 0
    return takeLastGen(iter, -start)
Severity: Minor
Found in src/lib/sync/generators.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 takeLastGen has a Cognitive Complexity of 7 (exceeds 5 allowed). Consider refactoring.
Open

export async function * takeLastGen<T> (iter: AsyncIterable<T>, num: number): AsyncIterable<T> {
  const buf = Array(num)
  let pos = 0
  let size = 0
  for await (const elem of iter) {
Severity: Minor
Found in src/lib/async/generators.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

Avoid too many return statements within this function.
Open

    return dropLastGen(takeLastGen(iter, -start), -end)
Severity: Major
Found in src/lib/sync/generators.ts - About 30 mins to fix

    Avoid too many return statements within this function.
    Open

        return dropLastGen(dropGen(iter, start), -end)
    Severity: Major
    Found in src/lib/sync/generators.ts - About 30 mins to fix

      Avoid too many return statements within this function.
      Open

          return dropLastGen(dropGen(iter, start), -end)
      Severity: Major
      Found in src/lib/async/generators.ts - About 30 mins to fix

        Avoid too many return statements within this function.
        Open

            return dropLastGen(takeLastGen(iter, -start), -end)
        Severity: Major
        Found in src/lib/async/generators.ts - About 30 mins to fix

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

          export async function * chunkWhileGen<T> (
  iter: AsyncIterable<T>,
  func: AsyncChunkingPredicate<T>,
): AsyncIterable<Array<T>> {
  let chunk: Array<T> = []
          Severity: Minor
          Found in src/lib/async/generators.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

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