function plus(a, b)
{
    return a + b;
}

console.log(plus(2,3));


function curried_plus(a)
{
    return function(b) { return plus(a,b); };
}

console.log(curried_plus(2)(3));


function partial_plus(b)
{
    return plus(2, b);
}

console.log(partial_plus(3));	// 5



var _ = require('lodash');

var result = _.map([3,2,9,6], function(e) { return plus(2, e); });
console.log(result);			// [ 5, 4, 11, 8 ]

var result = _.map([3,2,9,6], curried_plus(2));
console.log(result);

var lodash_curried_plus = _.curry(plus);
var result = _.map([3,2,9,6], lodash_curried_plus(2));

var result = _.map([3,2,9,6], _.curry(plus)(2));
console.log(result);



function plus3(a, b, c)
{
    return a+b+c;
}

curried_plus3 = _.curry(plus3);


var result = _.map([3,2,9,6], curried_plus3("a")("b"));
console.log(result);			// [ 'ab3', 'ab2', 'ab9', 'ab6' ]
var result = _.map([3,2,9,6], curried_plus3("a", "b"));
console.log(result);			// [ 'ab3', 'ab2', 'ab9', 'ab6' ]

var result = _.map([3,2,9,6], curried_plus3("a")(_, "b"));
console.log(result);			// [ 'a3b', 'a2b', 'a9b', 'a6b' ]
var result = _.map([3,2,9,6], curried_plus3(_, "a")(_, "b"));
console.log(result);			// [ '3ab', '2ab', '9ab', '6ab' ]


function plus4(a,b,c,d)
{
    return a+b+c+d;
}
console.log(_.curry(plus4)('a')('b')(_,'c')('d'));	 // abdc
console.log(_.curry(plus4)('a')(_, 'b')('c')('d'));	 // acbd
console.log(_.curry(plus4)(_,'a')('b')('c')('d'));	 // bacd


// partial
var result = _.map([3,2,9,6], _.partial(plus3, 'a', 'b'));
console.log(result);			// [ 'ab3', 'ab2', 'ab9', 'ab6' ]

var result = _.map([3,2,9,6], _.partial(plus3, 'a', _, 'b'));
console.log(result);			// [ 'a3b', 'a2b', 'a9b', 'a6b' ]

var result = _.map([3,2,9,6], _.partial(plus3, _, 'a', 'b'));
console.log(result);			// [ '3ab', '2ab', '9ab', '6ab' ]



// bind
function Person(name, age)
{
	this.name = name;
	this.age = age;
	this.add_age = function (n) { return this.age + n; };
}
var user = new Person('taro', 30);
console.log(_.map([3, 2, 9, 6], _.bind(user.add_age, user)));
// [ 33, 32, 39, 36 ]