isEmpty - nodef/extra-iterable GitHub Wiki
Check if an iterable is empty.
Similar: index, indexRange, size, isEmpty.
function isEmpty(x)
// x: an iterable
const xiterable = require('extra-iterable');
var x = [1, 2, 3];
xiterable.isEmpty(x);
// → false
var x = [];
xiterable.isEmpty(x);
// → true