_.concat

Creates a new array concatenating array with any additional arrays and/or values.

// Underscore/Lodash
var array = [1]
var other = _.concat(array, 2, [3], [[4]])
 
console.log(other)
// output: [1, 2, 3, [4]]
 
// Native
var array = [1]
var other = array.concat(2, [3], [[4]])
 
console.log(other)
// output: [1, 2, 3, [4]]

Browser Support for Array.prototype.concat()

1.0 ✔	✔	1.0 ✔	5.5 ✔	✔	✔