easy_problems.js

// create a function that accepts two arguments and return them reverted
function revert(a, b){
    return [b, a];
}

// create a function that no accepts arguments and return them reverted
function revert(){
    return [ arguments[1], arguments[0] ];
}

// create a function that reverse all arguments
function revert() { 
    var reversedArgs = [];

    for(i = arguments.length -1 ; i >= 0; i--){
        reversedArgs.push(arguments[i]);
    }
    return reversedArgs;
}

// create a function that return thar arguments incremented
function soma(a, b) {
    a++;
    b++;
    console.log(a, b);
}

// create a function that accepts two args: { a: 1}, { b: 2 } and increment
function incrementObjects(a, b){
    a.a++
    b.b++
    console.log(a, b);
}

// create a function same as 5 but not modify original objects
function incrementObject(a, b){
    var x a.a;
    var y = b.b;
    console.log(x++, y++);
}


function fn(foo, a, b){
    foo(a, b);
}


// 10
function fn(foo) {
    var inner = function() {};
    inner.foo = foo;
    return inner;
}

var ret = fn(console.log);
ret.foo === console.log;