Array.prototype.filter

Returns the elements of an array that meet the condition specified in a callback function.

Syntax

filter(predicate, thisArg?)

Parameters

• predicate function(value, index, array)

  A function that accepts up to three arguments. The filter method calls the predicate function one time for each element in the array.

• thisArg optional

  An object to which the this keyword can refer in the predicate function. If thisArg is omitted, undefined is used as the this value.

Return value

New array after filtering.

Examples

[1, 2, 3, 4, 5].filter(x => x != 0 && x % 2 == 0)

[2, 4]

["coffee", "tea", "juice"].filter(drink => drink.length > 3)

["coffee", "juice"]

[0, 1, null, "ok", undefined].filter(x => x)

[1, "ok"]