draw() {
        const nbVals = this.entropy.length;
        if (nbVals < 1) {
            return;
        }

Close

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

• Cognitive Complexity docs
• Cognitive Complexity: A new way of measuring understandability

    constructor(width, height) {

Close

require JSDoc comments (require-jsdoc)

JSDoc is a JavaScript API documentation generator. It uses specially-formatted comments inside of code to generate API documentation automatically. For example, this is what a JSDoc comment looks like for a function:

/**
 * Adds two numbers together.
 * @param {int} num1 The first number.
 * @param {int} num2 The second number.
 * @returns {int} The sum of the two numbers.
 */
function sum(num1, num2) {
    return num1 + num2;
}

Some style guides require JSDoc comments for all functions as a way of explaining function behavior.

Rule Details

This rule requires JSDoc comments for specified nodes. Supported nodes:

• "FunctionDeclaration"
• "ClassDeclaration"
• "MethodDefinition"
• "ArrowFunctionExpression"

Options

This rule has a single object option:

• "require" requires JSDoc comments for the specified nodes

Default option settings are:

{
    "require-jsdoc": ["error", {
        "require": {
            "FunctionDeclaration": true,
            "MethodDefinition": false,
            "ClassDeclaration": false,
            "ArrowFunctionExpression": false
        }
    }]
}

require

Examples of incorrect code for this rule with the { "require": { "FunctionDeclaration": true, "MethodDefinition": true, "ClassDeclaration": true, "ArrowFunctionExpression": true } } option:

/*eslint "require-jsdoc": ["error", {
    "require": {
        "FunctionDeclaration": true,
        "MethodDefinition": true,
        "ClassDeclaration": true
    }
}]*/

function foo() {
    return 10;
}

var foo = () => {
    return 10;
}

class Test{
    getDate(){}
}

Examples of correct code for this rule with the { "require": { "FunctionDeclaration": true, "MethodDefinition": true, "ClassDeclaration": true, "ArrowFunctionExpression": true } } option:

/*eslint "require-jsdoc": ["error", {
    "require": {
        "FunctionDeclaration": true,
        "MethodDefinition": true,
        "ClassDeclaration": true
    }
}]*/

/**
 * It returns 10
 */
function foo() {
    return 10;
}

/**
 * It returns test + 10
 * @params {int} test - some number
 * @returns {int} sum of test and 10
 */
var foo = (test) => {
    return test + 10;
}

/**
 * It returns 10
 */
var foo = () => {
    return 10;
}

/**
 * It returns 10
 */
var foo = function() {
    return 10;
}

var array = [1,2,3];
array.filter(function(item) {
    return item > 2;
});

/**
 * It returns 10
 */
class Test{
    /**
    * returns the date
    */
    getDate(){}
}

setTimeout(() => {}, 10); // since it's an anonymous arrow function

When Not To Use It

If you do not require JSDoc for your functions, then you can leave this rule off.

Related Rules

• [valid-jsdoc](valid-jsdoc.md) Source: http://eslint.org/docs/rules/

    refreshEntropy() {

Close

require JSDoc comments (require-jsdoc)

JSDoc is a JavaScript API documentation generator. It uses specially-formatted comments inside of code to generate API documentation automatically. For example, this is what a JSDoc comment looks like for a function:

/**
 * Adds two numbers together.
 * @param {int} num1 The first number.
 * @param {int} num2 The second number.
 * @returns {int} The sum of the two numbers.
 */
function sum(num1, num2) {
    return num1 + num2;
}

Some style guides require JSDoc comments for all functions as a way of explaining function behavior.

Rule Details

This rule requires JSDoc comments for specified nodes. Supported nodes:

• "FunctionDeclaration"
• "ClassDeclaration"
• "MethodDefinition"
• "ArrowFunctionExpression"

Options

This rule has a single object option:

• "require" requires JSDoc comments for the specified nodes

Default option settings are:

{
    "require-jsdoc": ["error", {
        "require": {
            "FunctionDeclaration": true,
            "MethodDefinition": false,
            "ClassDeclaration": false,
            "ArrowFunctionExpression": false
        }
    }]
}

require

Examples of incorrect code for this rule with the { "require": { "FunctionDeclaration": true, "MethodDefinition": true, "ClassDeclaration": true, "ArrowFunctionExpression": true } } option:

/*eslint "require-jsdoc": ["error", {
    "require": {
        "FunctionDeclaration": true,
        "MethodDefinition": true,
        "ClassDeclaration": true
    }
}]*/

function foo() {
    return 10;
}

var foo = () => {
    return 10;
}

class Test{
    getDate(){}
}

Examples of correct code for this rule with the { "require": { "FunctionDeclaration": true, "MethodDefinition": true, "ClassDeclaration": true, "ArrowFunctionExpression": true } } option:

/*eslint "require-jsdoc": ["error", {
    "require": {
        "FunctionDeclaration": true,
        "MethodDefinition": true,
        "ClassDeclaration": true
    }
}]*/

/**
 * It returns 10
 */
function foo() {
    return 10;
}

/**
 * It returns test + 10
 * @params {int} test - some number
 * @returns {int} sum of test and 10
 */
var foo = (test) => {
    return test + 10;
}

/**
 * It returns 10
 */
var foo = () => {
    return 10;
}

/**
 * It returns 10
 */
var foo = function() {
    return 10;
}

var array = [1,2,3];
array.filter(function(item) {
    return item > 2;
});

/**
 * It returns 10
 */
class Test{
    /**
    * returns the date
    */
    getDate(){}
}

setTimeout(() => {}, 10); // since it's an anonymous arrow function

When Not To Use It

If you do not require JSDoc for your functions, then you can leave this rule off.

Related Rules

• [valid-jsdoc](valid-jsdoc.md) Source: http://eslint.org/docs/rules/

const xmlns = "http://www.w3.org/2000/svg";

Close

enforce the consistent use of either backticks, double, or single quotes (quotes)

JavaScript allows you to define strings in one of three ways: double quotes, single quotes, and backticks (as of ECMAScript 6). For example:

/*eslint-env es6*/

var double = "double";
var single = 'single';
var backtick = `backtick`;    // ES6 only

Each of these lines creates a string and, in some cases, can be used interchangeably. The choice of how to define strings in a codebase is a stylistic one outside of template literals (which allow embedded of expressions to be interpreted).

Many codebases require strings to be defined in a consistent manner.

Rule Details

This rule enforces the consistent use of either backticks, double, or single quotes.

Options

This rule has two options, a string option and an object option.

String option:

• "double" (default) requires the use of double quotes wherever possible
• "single" requires the use of single quotes wherever possible
• "backtick" requires the use of backticks wherever possible

Object option:

• "avoidEscape": true allows strings to use single-quotes or double-quotes so long as the string contains a quote that would have to be escaped otherwise
• "allowTemplateLiterals": true allows strings to use backticks

Deprecated: The object property avoid-escape is deprecated; please use the object property avoidEscape instead.

double

Examples of incorrect code for this rule with the default "double" option:

/*eslint quotes: ["error", "double"]*/

var single = 'single';
var unescaped = 'a string containing "double" quotes';

Examples of correct code for this rule with the default "double" option:

/*eslint quotes: ["error", "double"]*/
/*eslint-env es6*/

var double = "double";
var backtick = `back\ntick`;  // backticks are allowed due to newline
var backtick = tag`backtick`; // backticks are allowed due to tag

single

Examples of incorrect code for this rule with the "single" option:

/*eslint quotes: ["error", "single"]*/

var double = "double";
var unescaped = "a string containing 'single' quotes";

Examples of correct code for this rule with the "single" option:

/*eslint quotes: ["error", "single"]*/
/*eslint-env es6*/

var single = 'single';
var backtick = `back${x}tick`; // backticks are allowed due to substitution

backticks

Examples of incorrect code for this rule with the "backtick" option:

/*eslint quotes: ["error", "backtick"]*/

var single = 'single';
var double = "double";
var unescaped = 'a string containing `backticks`';

Examples of correct code for this rule with the "backtick" option:

/*eslint quotes: ["error", "backtick"]*/
/*eslint-env es6*/

var backtick = `backtick`;

avoidEscape

Examples of additional correct code for this rule with the "double", { "avoidEscape": true } options:

/*eslint quotes: ["error", "double", { "avoidEscape": true }]*/

var single = 'a string containing "double" quotes';

Examples of additional correct code for this rule with the "single", { "avoidEscape": true } options:

/*eslint quotes: ["error", "single", { "avoidEscape": true }]*/

var double = "a string containing 'single' quotes";

Examples of additional correct code for this rule with the "backtick", { "avoidEscape": true } options:

/*eslint quotes: ["error", "backtick", { "avoidEscape": true }]*/

var double = "a string containing `backtick` quotes"

allowTemplateLiterals

Examples of additional correct code for this rule with the "double", { "allowTemplateLiterals": true } options:

/*eslint quotes: ["error", "double", { "allowTemplateLiterals": true }]*/

var double = "double";
var double = `double`;

Examples of additional correct code for this rule with the "single", { "allowTemplateLiterals": true } options:

/*eslint quotes: ["error", "single", { "allowTemplateLiterals": true }]*/

var single = 'single';
var single = `single`;

When Not To Use It

If you do not need consistency in your string styles, you can safely disable this rule. Source: http://eslint.org/docs/rules/

    get DOM() { return this.card; }

Close

require JSDoc comments (require-jsdoc)

JSDoc is a JavaScript API documentation generator. It uses specially-formatted comments inside of code to generate API documentation automatically. For example, this is what a JSDoc comment looks like for a function:

/**
 * Adds two numbers together.
 * @param {int} num1 The first number.
 * @param {int} num2 The second number.
 * @returns {int} The sum of the two numbers.
 */
function sum(num1, num2) {
    return num1 + num2;
}

Some style guides require JSDoc comments for all functions as a way of explaining function behavior.

Rule Details

This rule requires JSDoc comments for specified nodes. Supported nodes:

• "FunctionDeclaration"
• "ClassDeclaration"
• "MethodDefinition"
• "ArrowFunctionExpression"

Options

This rule has a single object option:

• "require" requires JSDoc comments for the specified nodes

Default option settings are:

{
    "require-jsdoc": ["error", {
        "require": {
            "FunctionDeclaration": true,
            "MethodDefinition": false,
            "ClassDeclaration": false,
            "ArrowFunctionExpression": false
        }
    }]
}

require

Examples of incorrect code for this rule with the { "require": { "FunctionDeclaration": true, "MethodDefinition": true, "ClassDeclaration": true, "ArrowFunctionExpression": true } } option:

/*eslint "require-jsdoc": ["error", {
    "require": {
        "FunctionDeclaration": true,
        "MethodDefinition": true,
        "ClassDeclaration": true
    }
}]*/

function foo() {
    return 10;
}

var foo = () => {
    return 10;
}

class Test{
    getDate(){}
}

Examples of correct code for this rule with the { "require": { "FunctionDeclaration": true, "MethodDefinition": true, "ClassDeclaration": true, "ArrowFunctionExpression": true } } option:

/*eslint "require-jsdoc": ["error", {
    "require": {
        "FunctionDeclaration": true,
        "MethodDefinition": true,
        "ClassDeclaration": true
    }
}]*/

/**
 * It returns 10
 */
function foo() {
    return 10;
}

/**
 * It returns test + 10
 * @params {int} test - some number
 * @returns {int} sum of test and 10
 */
var foo = (test) => {
    return test + 10;
}

/**
 * It returns 10
 */
var foo = () => {
    return 10;
}

/**
 * It returns 10
 */
var foo = function() {
    return 10;
}

var array = [1,2,3];
array.filter(function(item) {
    return item > 2;
});

/**
 * It returns 10
 */
class Test{
    /**
    * returns the date
    */
    getDate(){}
}

setTimeout(() => {}, 10); // since it's an anonymous arrow function

When Not To Use It

If you do not require JSDoc for your functions, then you can leave this rule off.

Related Rules

• [valid-jsdoc](valid-jsdoc.md) Source: http://eslint.org/docs/rules/

    build() {

Close

require JSDoc comments (require-jsdoc)

JSDoc is a JavaScript API documentation generator. It uses specially-formatted comments inside of code to generate API documentation automatically. For example, this is what a JSDoc comment looks like for a function:

/**
 * Adds two numbers together.
 * @param {int} num1 The first number.
 * @param {int} num2 The second number.
 * @returns {int} The sum of the two numbers.
 */
function sum(num1, num2) {
    return num1 + num2;
}

Some style guides require JSDoc comments for all functions as a way of explaining function behavior.

Rule Details

This rule requires JSDoc comments for specified nodes. Supported nodes:

• "FunctionDeclaration"
• "ClassDeclaration"
• "MethodDefinition"
• "ArrowFunctionExpression"

Options

This rule has a single object option:

• "require" requires JSDoc comments for the specified nodes

Default option settings are:

{
    "require-jsdoc": ["error", {
        "require": {
            "FunctionDeclaration": true,
            "MethodDefinition": false,
            "ClassDeclaration": false,
            "ArrowFunctionExpression": false
        }
    }]
}

require

Examples of incorrect code for this rule with the { "require": { "FunctionDeclaration": true, "MethodDefinition": true, "ClassDeclaration": true, "ArrowFunctionExpression": true } } option:

/*eslint "require-jsdoc": ["error", {
    "require": {
        "FunctionDeclaration": true,
        "MethodDefinition": true,
        "ClassDeclaration": true
    }
}]*/

function foo() {
    return 10;
}

var foo = () => {
    return 10;
}

class Test{
    getDate(){}
}

Examples of correct code for this rule with the { "require": { "FunctionDeclaration": true, "MethodDefinition": true, "ClassDeclaration": true, "ArrowFunctionExpression": true } } option:

/*eslint "require-jsdoc": ["error", {
    "require": {
        "FunctionDeclaration": true,
        "MethodDefinition": true,
        "ClassDeclaration": true
    }
}]*/

/**
 * It returns 10
 */
function foo() {
    return 10;
}

/**
 * It returns test + 10
 * @params {int} test - some number
 * @returns {int} sum of test and 10
 */
var foo = (test) => {
    return test + 10;
}

/**
 * It returns 10
 */
var foo = () => {
    return 10;
}

/**
 * It returns 10
 */
var foo = function() {
    return 10;
}

var array = [1,2,3];
array.filter(function(item) {
    return item > 2;
});

/**
 * It returns 10
 */
class Test{
    /**
    * returns the date
    */
    getDate(){}
}

setTimeout(() => {}, 10); // since it's an anonymous arrow function

When Not To Use It

If you do not require JSDoc for your functions, then you can leave this rule off.

Related Rules

• [valid-jsdoc](valid-jsdoc.md) Source: http://eslint.org/docs/rules/

    refresh() {

Close

require JSDoc comments (require-jsdoc)

JSDoc is a JavaScript API documentation generator. It uses specially-formatted comments inside of code to generate API documentation automatically. For example, this is what a JSDoc comment looks like for a function:

/**
 * Adds two numbers together.
 * @param {int} num1 The first number.
 * @param {int} num2 The second number.
 * @returns {int} The sum of the two numbers.
 */
function sum(num1, num2) {
    return num1 + num2;
}

Some style guides require JSDoc comments for all functions as a way of explaining function behavior.

Rule Details

This rule requires JSDoc comments for specified nodes. Supported nodes:

• "FunctionDeclaration"
• "ClassDeclaration"
• "MethodDefinition"
• "ArrowFunctionExpression"

Options

This rule has a single object option:

• "require" requires JSDoc comments for the specified nodes

Default option settings are:

{
    "require-jsdoc": ["error", {
        "require": {
            "FunctionDeclaration": true,
            "MethodDefinition": false,
            "ClassDeclaration": false,
            "ArrowFunctionExpression": false
        }
    }]
}

require

Examples of incorrect code for this rule with the { "require": { "FunctionDeclaration": true, "MethodDefinition": true, "ClassDeclaration": true, "ArrowFunctionExpression": true } } option:

/*eslint "require-jsdoc": ["error", {
    "require": {
        "FunctionDeclaration": true,
        "MethodDefinition": true,
        "ClassDeclaration": true
    }
}]*/

function foo() {
    return 10;
}

var foo = () => {
    return 10;
}

class Test{
    getDate(){}
}

Examples of correct code for this rule with the { "require": { "FunctionDeclaration": true, "MethodDefinition": true, "ClassDeclaration": true, "ArrowFunctionExpression": true } } option:

/*eslint "require-jsdoc": ["error", {
    "require": {
        "FunctionDeclaration": true,
        "MethodDefinition": true,
        "ClassDeclaration": true
    }
}]*/

/**
 * It returns 10
 */
function foo() {
    return 10;
}

/**
 * It returns test + 10
 * @params {int} test - some number
 * @returns {int} sum of test and 10
 */
var foo = (test) => {
    return test + 10;
}

/**
 * It returns 10
 */
var foo = () => {
    return 10;
}

/**
 * It returns 10
 */
var foo = function() {
    return 10;
}

var array = [1,2,3];
array.filter(function(item) {
    return item > 2;
});

/**
 * It returns 10
 */
class Test{
    /**
    * returns the date
    */
    getDate(){}
}

setTimeout(() => {}, 10); // since it's an anonymous arrow function

When Not To Use It

If you do not require JSDoc for your functions, then you can leave this rule off.

Related Rules

• [valid-jsdoc](valid-jsdoc.md) Source: http://eslint.org/docs/rules/

export class EntropyCard {

Close

require JSDoc comments (require-jsdoc)

JSDoc is a JavaScript API documentation generator. It uses specially-formatted comments inside of code to generate API documentation automatically. For example, this is what a JSDoc comment looks like for a function:

/**
 * Adds two numbers together.
 * @param {int} num1 The first number.
 * @param {int} num2 The second number.
 * @returns {int} The sum of the two numbers.
 */
function sum(num1, num2) {
    return num1 + num2;
}

Some style guides require JSDoc comments for all functions as a way of explaining function behavior.

Rule Details

This rule requires JSDoc comments for specified nodes. Supported nodes:

• "FunctionDeclaration"
• "ClassDeclaration"
• "MethodDefinition"
• "ArrowFunctionExpression"

Options

This rule has a single object option:

• "require" requires JSDoc comments for the specified nodes

Default option settings are:

{
    "require-jsdoc": ["error", {
        "require": {
            "FunctionDeclaration": true,
            "MethodDefinition": false,
            "ClassDeclaration": false,
            "ArrowFunctionExpression": false
        }
    }]
}

require

Examples of incorrect code for this rule with the { "require": { "FunctionDeclaration": true, "MethodDefinition": true, "ClassDeclaration": true, "ArrowFunctionExpression": true } } option:

/*eslint "require-jsdoc": ["error", {
    "require": {
        "FunctionDeclaration": true,
        "MethodDefinition": true,
        "ClassDeclaration": true
    }
}]*/

function foo() {
    return 10;
}

var foo = () => {
    return 10;
}

class Test{
    getDate(){}
}

Examples of correct code for this rule with the { "require": { "FunctionDeclaration": true, "MethodDefinition": true, "ClassDeclaration": true, "ArrowFunctionExpression": true } } option:

/*eslint "require-jsdoc": ["error", {
    "require": {
        "FunctionDeclaration": true,
        "MethodDefinition": true,
        "ClassDeclaration": true
    }
}]*/

/**
 * It returns 10
 */
function foo() {
    return 10;
}

/**
 * It returns test + 10
 * @params {int} test - some number
 * @returns {int} sum of test and 10
 */
var foo = (test) => {
    return test + 10;
}

/**
 * It returns 10
 */
var foo = () => {
    return 10;
}

/**
 * It returns 10
 */
var foo = function() {
    return 10;
}

var array = [1,2,3];
array.filter(function(item) {
    return item > 2;
});

/**
 * It returns 10
 */
class Test{
    /**
    * returns the date
    */
    getDate(){}
}

setTimeout(() => {}, 10); // since it's an anonymous arrow function

When Not To Use It

If you do not require JSDoc for your functions, then you can leave this rule off.

Related Rules

• [valid-jsdoc](valid-jsdoc.md) Source: http://eslint.org/docs/rules/

    draw() {

Close

require JSDoc comments (require-jsdoc)

JSDoc is a JavaScript API documentation generator. It uses specially-formatted comments inside of code to generate API documentation automatically. For example, this is what a JSDoc comment looks like for a function:

/**
 * Adds two numbers together.
 * @param {int} num1 The first number.
 * @param {int} num2 The second number.
 * @returns {int} The sum of the two numbers.
 */
function sum(num1, num2) {
    return num1 + num2;
}

Some style guides require JSDoc comments for all functions as a way of explaining function behavior.

Rule Details

This rule requires JSDoc comments for specified nodes. Supported nodes:

• "FunctionDeclaration"
• "ClassDeclaration"
• "MethodDefinition"
• "ArrowFunctionExpression"

Options

This rule has a single object option:

• "require" requires JSDoc comments for the specified nodes

Default option settings are:

{
    "require-jsdoc": ["error", {
        "require": {
            "FunctionDeclaration": true,
            "MethodDefinition": false,
            "ClassDeclaration": false,
            "ArrowFunctionExpression": false
        }
    }]
}

require

Examples of incorrect code for this rule with the { "require": { "FunctionDeclaration": true, "MethodDefinition": true, "ClassDeclaration": true, "ArrowFunctionExpression": true } } option:

/*eslint "require-jsdoc": ["error", {
    "require": {
        "FunctionDeclaration": true,
        "MethodDefinition": true,
        "ClassDeclaration": true
    }
}]*/

function foo() {
    return 10;
}

var foo = () => {
    return 10;
}

class Test{
    getDate(){}
}

Examples of correct code for this rule with the { "require": { "FunctionDeclaration": true, "MethodDefinition": true, "ClassDeclaration": true, "ArrowFunctionExpression": true } } option:

/*eslint "require-jsdoc": ["error", {
    "require": {
        "FunctionDeclaration": true,
        "MethodDefinition": true,
        "ClassDeclaration": true
    }
}]*/

/**
 * It returns 10
 */
function foo() {
    return 10;
}

/**
 * It returns test + 10
 * @params {int} test - some number
 * @returns {int} sum of test and 10
 */
var foo = (test) => {
    return test + 10;
}

/**
 * It returns 10
 */
var foo = () => {
    return 10;
}

/**
 * It returns 10
 */
var foo = function() {
    return 10;
}

var array = [1,2,3];
array.filter(function(item) {
    return item > 2;
});

/**
 * It returns 10
 */
class Test{
    /**
    * returns the date
    */
    getDate(){}
}

setTimeout(() => {}, 10); // since it's an anonymous arrow function

When Not To Use It

If you do not require JSDoc for your functions, then you can leave this rule off.

Related Rules

• [valid-jsdoc](valid-jsdoc.md) Source: http://eslint.org/docs/rules/

        const minVal = this.entropy.reduce((prev, curr) => (prev.value < curr.value) ? prev : curr).value;

Close

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 46.

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

• Extract Method
• Extract Class
• Form Template Method
• Introduce Null Object
• Pull Up Method
• Pull Up Field
• Substitute Algorithm

Further Reading

• Don't Repeat Yourself on the C2 Wiki
• Duplicated Code on SourceMaking
• Refactoring: Improving the Design of Existing Code by Martin Fowler. Duplicated Code, p76

        const maxVal = this.entropy.reduce((prev, curr) => (prev.value > curr.value) ? prev : curr).value;

Close

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 46.

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

• Extract Method
• Extract Class
• Form Template Method
• Introduce Null Object
• Pull Up Method
• Pull Up Field
• Substitute Algorithm

Further Reading

• Don't Repeat Yourself on the C2 Wiki
• Duplicated Code on SourceMaking
• Refactoring: Improving the Design of Existing Code by Martin Fowler. Duplicated Code, p76