how to do a “flat push” in javascript?

Question

I want to push all individual elements of a source array onto a target array,

target.push(source);

puts just source\'s reference on the tar

Answer 1

apply does what you want:

var target = [1,2];
var source = [3,4,5];

target.push.apply(target, source);

alert(target); // 1, 2, 3, 4, 5

MDC - apply

Calls a function with a given this value and arguments provided as an array.