has

Check if ilists has a key.

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

function has(x, k)
// x: ilists
// k: search key

const xilists = require('extra-ilists');

var x = [['a', 'b', 'c'], [1, 2, -3]];
xilists.has(x, 'd');
// → false

xilists.has(x, 'c');
// → true

References

• Array.prototype.includes: MDN web docs
• array-tools.contains: @75lb