keys

List all keys.

Similar: randomKey, keys, has.

function keys(x)
// x: ientries

const ientries = require('extra-ientries');

var x = [["a", 1], ["b", 2], ["c", 3]];
[...ientries.keys(x)];
// → [ "a", "b", "c" ]

References

• Array.prototype.values: MDN web docs