none

v0.9.6

STATUS

Passing

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VISIBILITY

Public

PUBLISHED

5 years ago

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1 KB

Returns `true` if no elements of the list match the predicate, `false` otherwise.

Boolean

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none (

fn:Function,

list:Array

) : Boolean

Returns true if no elements of the list match the predicate, false otherwise.

Dispatches to the all method of the second argument, if present.

Acts as a transducer if a transformer is given in list position.

Example

const isEven = n => n % 2 === 0;
     const isOdd = n => n % 2 === 1;

     R.none(isEven, [1, 3, 5, 7, 9, 11]); //=> true
     R.none(isOdd, [1, 3, 5, 7, 8, 11]); //=> false

Arguments

fn: Function

The predicate function.

list: Array

The array to consider.

Returns

Boolean

`true` if the predicate is not satisfied by every element, `false` otherwise.