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UnlyEd/iso3166-1

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

  const to3 = function to3 (alpha2) {
    if (alpha2 && alpha2.length > 1) state = alpha2
    if (state.length !== 2) return state
    const matchingCodes = ISOCodes.filter(function (row) {
      return row.alpha2 === state
Severity: Major
Found in src/index.js and 1 other location - About 4 hrs to fix
src/index.js on lines 14..26

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 122.

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

  const to2 = function to2 (alpha3) {
    if (alpha3 && alpha3.length > 1) state = alpha3
    if (state.length !== 3) return state
    const matchingCodes = ISOCodes.filter(function (row) {
      return row.alpha3 === state
Severity: Major
Found in src/index.js and 1 other location - About 4 hrs to fix
src/index.js on lines 34..46

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 122.

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 iso3166 has a Cognitive Complexity of 20 (exceeds 5 allowed). Consider refactoring.
Open

module.exports = (function iso3166 () {
  let state = ''

  /**
   * Convert an ISO 3166-1 alpha-3 code to alpha-2
Severity: Minor
Found in src/index.js - About 2 hrs 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 iso3166 has 57 lines of code (exceeds 25 allowed). Consider refactoring.
Open

module.exports = (function iso3166 () {
  let state = ''

  /**
   * Convert an ISO 3166-1 alpha-3 code to alpha-2
Severity: Major
Found in src/index.js - About 2 hrs to fix
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