Code for partialApply blog post

partialApply-1.js

function add (x, y, z) {
  return x + y + z;
}

partialApply-10.js

partialApply(add, 1)(1)(2); // yields 4
partialApply(add)(1)(1)(2); // yields 4
partialApply(add)(1, 1)(2); // yields 4
partialApply(add, 1, 1, 2); // yields 4

partialApply-11.js

add.partialApply(1)(1)(2); // yields 4
add.partialApply(1, 1)(2); // yields 4
add.partialApply(1, 1, 2); // yields 4

partialApply-12.js

Function.prototype.partialApply = function() {
    var fn = this;
    var slice = Array.prototype.slice;
    var curr_args = slice.call(arguments);
    if(fn.length > curr_args.length) {
        return function () {
            var new_args = slice.call(arguments);
            var args = curr_args.concat(new_args);
            return fn.partialApply.apply(fn, args); 
        }
    }
    else {
        return fn.apply(null, curr_args);
    }
};

partialApply-13.js

return fn.partialApply.apply(fn, args);

partialApply-14.js

return fn.partialApply.apply(null, args);

partialApply-15.js

var add = function(x, y, z) {
    return x + y + z;
}.partialApply();
var a = add(1, 2, 3); // yields 6
var b = add(1)(2)(3); // yields 6
var c = add(1)(2, 3); // yields 6

partialApply-2.js

var partialAdd = add(1); // yields a function that needs 2 more arguments
var result = partialAdd(2, 3);  // yields 6

partialApply-3.js

add(1, 2, 3); // yields 6
add(1)(2)(3); // yields 6

partialApply-4.js

function schonfinkelize(fn) {
     var slice = Array.prototype.slice,
        stored_args = slice.call(arguments, 1);
     return function () {
        var new_args = slice.call(arguments),
              args = stored_args.concat(new_args);
        return fn.apply(null, args);
     };
}

partialApply-5.js

var addSecondHalf = schonfinkelize(add, 1); // yields a function
addSecondHalf(2, 3); // yields 6 

partialApply-6.js

schonfinkelize(add, 1)(2)(3); // Doesn't work

partialApply-7.js

schonfinkelize(schonfinkelize(add, 1)(2))(3);  // yields 6

partialApply-8.js

add.length  // yields 3

partialApply-9.js

function partialApply(fn) {
    var slice = Array.prototype.slice;
    var curr_args = slice.call(arguments, 1);
    if(fn.length > curr_args.length) {
        return function() {
            var new_args = slice.call(arguments);
            var args = curr_args.concat(new_args);
            return partialApply.apply(null, [fn].concat(args));
        }
    }
    else {
        return fn.apply(null, curr_args);
    }
}