Negate predicate

OSCC · JavaScript, Function · Sep 15, 2020

Negates a predicate function.

  • Take a predicate function and apply the not operator (!) to it with its arguments.
const negate = func => (...args) => !func(...args);
[1, 2, 3, 4, 5, 6].filter(negate(n => n % 2 === 0)); // [ 1, 3, 5 ]

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