Split String in Half By Word

Question

I\'m in a situation where I\'d like to take a string and split it in half, respecting words so that this string here doesn\'t get split into this str

Answer 1

Look for the first space before and after the middle, and pick the one closest to the middle.

Example:

var s = "This is a long string";

var middle = Math.floor(s.length / 2);
var before = s.lastIndexOf(' ', middle);
var after = s.indexOf(' ', middle + 1);

if (middle - before < after - middle) {
    middle = before;
} else {
    middle = after;
}

var s1 = s.substr(0, middle);
var s2 = s.substr(middle + 1);

Demo: http://jsfiddle.net/7RNBu/

(This code assumes that there actually are spaces on both sides of the middle. You would also add checks for before and after being -1.)

Edit:

The check that I talked about in the node would be done correctly like this:

if (before == -1 || (after != -1 && middle - before >= after - middle)) {
    middle = after;
} else {
    middle = before;
}

Here is a fiddle where you can edit the text and see the result immediately: http://jsfiddle.net/Guffa/7RNBu/11/