size - nodef/extra-object GitHub Wiki

Get the number of keys in an object.

Similar: size, isEmpty.

function size(x)
// x: an object

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

var x = {a: 1, b: 2, c: 3};
object.size(x);
// → 3

References

• Array.prototype.slice: MDN web docs
• Array.length: MDN web docs