used function condition in sort

used_condition.js

function _condition(a, b) {
    return a - b;
}


Array.prototype.SelectionSort = function(condition) {
    var len = this.length, i, min, j,
        fn = condition || _condition;
    // f() < n^2
    for ( i = 0; i < len - 1; i++ ) {
        min = i;
        for ( j = i + 1; j < len; j++ ) {
            if ( fn(this[min], this[j]) > 0 )
                min = j;
        }
        this.swap( i, min );
    }

    return this;
};