Inserts a value to an ordered array.
This is part of package extra-array.
array.insert$(x, v, [fn]);
// x: an array (updated)
// v: value to insert
// fn: compare function (a, b)
// --> x
const array = require('extra-array');
var a = [1, 7, 8, 10];
array.insert$(a, 5);
// [1, 5, 7, 8, 10]
a;
// [1, 5, 7, 8, 10]
var b = ['a', 'K', 'M', 'n'];
array.insert$(b, 'l', (a, b) => a.toLowerCase().localeCompare(b.toLowerCase()));
// ['a', 'K', 'l', 'M', 'n'];
b;
// ['a', 'K', 'l', 'M', 'n'];