length

Find the length of an array.

Similar: index, indexRange, size, isEmpty.

function length(x, i, I)
// x: an array
// i: start index [0]
// I: end index [X]

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

var x = [2, 4, 6, 8];
array.length(x);
// → 4

array.length(x, 1);
// → 3

array.length(x, 1, 3);
// → 2

References

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