javascript currying

curry.js

Function.prototype.curry = function() {
    var slice = Array.prototype.slice;
    var args = slice.apply(arguments);
    
    console.dir(slice);
    var that = this;
    
    return function() {
        return that.apply(null, args.concat(slice.apply(arguments)));
    }
};


var sum = function(a, b) {
    return a + b;
}

var s3 = sum.curry(3);

console.log(s3(10));