has - nodef/extra-entries GitHub Wiki

Check if entries has a key.

Alternatives: has, hasValue, hasEntry, hasSubset, hasPath. Similar: randomKey, keys, has.

function has(x, k)
// x: entries
// k: search key
const entries = require('extra-entries');

var x = ["a", 1], ["b", 2], ["c", -3](/nodef/extra-entries/wiki/"a",-1],-["b",-2],-["c",--3);
entries.has(x, "d");
// → false

entries.has(x, "c");
// → true

References