negate

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Subhajit Sahu edited this page Aug 7, 2022 · 1 revision

Generate a result-negated version of a function.

function negate(x)
// x: a function

const xasyncfn = require('extra-async-function');


var fn = xasyncfn.negate(isFinite);
await fn(Infinity)
// → true
await fn(1)
// → false

var fn = xasyncfn.negate(isNaN);
await fn(1);
// → true
await fn(Promise.resolve(NaN));
// → false

References