Limiting the times that .split() splits, rather than truncating the resulting array

Question

Really, pretty much what the title says.

Say you have this string:

var theString = \"a=b=c=d\";

Now, when you run theString

Answer 1

I'd use something like this:

function JavaSplit(string,separator,n) {
    var split = string.split(separator);
    if (split.length <= n)
        return split;
    var out = split.slice(0,n-1);
    out.push(split.slice(n-1).join(separator));
    return out;
}

What we're doing here is:

1. Splitting the string entirely
2. Taking the first n-1 elements, as described.
3. Re-joining the remaining elements.
4. Appending them to the array from step 2 and returning.

One might reasonably think you could chain all of those calls together, but .push() mutates an array rather than returning a new one. It's also a bit easier for you to follow this way.