Curried javascript functions example

curried-functions.js

#!/usr/bin/env node

function add(param1){

    return function(param2){
        return param1+param2;
    }
}

function substract(param1){
    
    return function(param2){
        return param1-param2;
    }
}

function swap(fn){
    return function(b,c){
        return fn(c)(b);
    }
}


function evaluate(operation){
    return function(param1){
        var myOperation = operation(param1);
        return function(param2){
            return myOperation(param2);
        }
    }
}

var value = swap(substract) (evaluate(substract)(evaluate(add)(8)(1))(2),evaluate(substract)(evaluate(add)(6)(2))(2));
console.log('( ( 6 + 2 ) - 2 ) - ( ( 8 + 1 ) - 2 ) = '+value);