JavaScript function similar to Python range()

Question

Is there a function in JavaScript similar to Python\'s range()?

I think there should be a better way than to write the following lines every time:

Answer 1

Here you go.

This will write (or overwrite) the value of each index with the index number.

Array.prototype.writeIndices = function( n ) {
    for( var i = 0; i < (n || this.length); ++i ) this[i] = i;
    return this;
};

If you don't provide a number, it will use the current length of the Array.

Use it like this:

var array = [].writeIndices(10);  // [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]