difference-with

v0.9.6

STATUS

Passing

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VISIBILITY

Public

PUBLISHED

5 years ago

SIZE

1013 B

Finds the set (i.e. no duplicates) of all elements in the first list not contained in the second list.

Diff

Utils

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differenceWith (

pred:Function,

list1:Array,

list2:Array

) : Array

Finds the set (i.e. no duplicates) of all elements in the first list not contained in the second list. Duplication is determined according to the value returned by applying the supplied predicate to two list elements.

Example

const cmp = (x, y) => x.a === y.a;
     const l1 = [{a: 1}, {a: 2}, {a: 3}];
     const l2 = [{a: 3}, {a: 4}];
     R.differenceWith(cmp, l1, l2); //=> [{a: 1}, {a: 2}]

Arguments

pred: Function

A predicate used to test whether two items are equal.

list1: Array

The first list.

list2: Array

The second list.

Returns

Array

The elements in `list1` that are not in `list2`.