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javascriptarrayspushflatten

how to do a "flat push" in javascript?

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 target list.

In stead I want to do:

for (i = 0; i < source.length; i++) {
    target.push(source[i]);
}

Is there a way in javascript to do this more elegant, without explicitly coding a repetition loop?

And while I'm at it, what is the correct term? I don't think that "flat push" is correct. Googling did not yield any results as source and target are both arrays.

Solution

  • 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.