Split in javascript

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In JavaScript, split behaves a litte different than expected. For example, we have a string needed to be split into pieces:

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var str = 'Steve Jobs, Deciding what not to do is, ' +  
          'as important as deciding what to do';

Say, we need to split and format the above string into:

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Steve Jobs: Deciding what not to do is, as important as deciding what to do.

If we use split without limitation: 

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var pieces = str.split(',');
console.log(pieces);

Actually, we got:

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[Steve Jobs, Deciding what not to do is, as important as deciding what to do]`.

So we add another argument:

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var pieces = str.split(',', 1);
console.log(pieces);

Got Only [Steve Jobs]. The result is not we except. The second argument just identify how many elments in the spilt pieces would return.

So we need to do the split ourself:

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function splitEnhanced(str, seperator, maxSplit) {
    var pieces = str.split(seperator);
    var result = [];
    if (!maxSplit) {
        return pieces;
    }
    while (maxSplit > 0) {
        result.push(pieces.shift());
        maxSplit--;
    }
    result.push(pieces.join(seperator));
    
    return result;
}
var pieces = splitEnhanced(str, ',', 1);
console.log(pieces.join(':'));
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