concat$

Append values from arrays.

Alternatives: concat, concat$.
Similar: concat, join.

function concat$(x, ...ys)
// x:  an array (updated)
// ys: arrays to append

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

var x = [1, 2];
var y = [3, 4];
array.concat$(x, y);
// → [ 1, 2, 3, 4 ]

x;
// → [ 1, 2, 3, 4 ]

var x = [1, 2];
array.concat$(x, y, y);
// → [ 1, 2, 3, 4, 3, 4 ]

References

• Array.prototype.concat: MDN web docs
• _.concat: lodash
• Array.append: sugarjs