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Summary

True if no elements of a list satisfied given predicate.

Tip

This function is curried.

Description

Returns true if predicate returned logical false for all elements of the list. When a predicate returns logical true, the function returns false immediately.

Examples

Check that a list does not contain any 'x'

const no_x = none(eq('x'));

no_x(['a', 'b', 'c']);          //=> true
no_x(['a', 'x', 'c']);          //=> false

no_x({m: 'a', n: 'b', o: 'c'}); //=> true
no_x({m: 'a', n: 'x', o: 'c'}); //=> false

Parameters

Name	Type	Description
pred	function	Predicate
xs	Array or Object	List of values

Return

boolean