Disallow creation of dense arrays using the Array constructor (no-array-constructor)

Use of the Array constructor to construct a new array is generally discouraged in favour of array literal notation because of the single-argument pitfall and because the Array global may be redefined. The exception is when the Array constructor is used to intentionally create sparse arrays of a specified size by giving the constructor a single numeric argument.

Rule Details

The following patterns are considered problems:

/*eslint no-array-constructor: 2*/

Array(0, 1, 2)     /*error The array literal notation [] is preferrable.*/

/*eslint no-array-constructor: 2*/

new Array(0, 1, 2) /*error The array literal notation [] is preferrable.*/

The following patterns are not considered problems:

/*eslint no-array-constructor: 2*/

Array(500)

/*eslint no-array-constructor: 2*/

new Array(someOtherArray.length)

When Not To Use It

This rule enforces a nearly universal stylistic concern. That being said, this rule may be disabled if the constructor style is preferred.

Related Rules

• no-new-object
• no-new-wrappers

Version

This rule was introduced in ESLint 0.4.0.

Resources

• Rule source
• Documentation source