smallest multifunctional composition

composition.js

var compose = function(array) {
    return array.reduce(function(a,b) { return function(c) { return b(a(c)) } })
}

var get = function(prop) {
    return function(obj) {
        return obj && obj[prop]
    }
}

var getpath = compose([ get('a'), get('b') ]);
console.log(getpath({ a: { b: 1 } }));

/* ============================================================= */

var composeArgs = function() {
  return [].reduce.call(arguments, function(a,b) { return function(c) { return b(a(c)) } })
}

var get = function(prop) {
    return function(obj) {
        return obj && obj[prop]
    }
}

var getpath = composeArgs(get('a'), get('b'));
console.log(getpath({ a: { b: 1 } }));

compositions.coffee

compose = (array) -> array.reduce (a, b) -> (c) -> b a(c)

get = (prop) -> (obj) -> obj and obj[prop]

getpath = compose [get('a'), get('b')]
alert getpath(a: b: 2)

# ============================================= #

composeArgs = -> [].reduce.call arguments, (a, b) -> (c) -> b a(c)

get = (prop) -> (obj) -> obj and obj[prop]

getpath = composeArgs get('a'), get('b')
alert getpath(a: b: 2)