//JS ShortHand:

// 1- ternary operator
    //- longHand
    if (var1 > var2) {
        resultado = 'Ok';
    }
    else {
        resultado = 'error';
    }
    //- shortHand
    resultado = var1 > var2 ? 'Ok' : 'Error';

// 2 - Null, Undefined, Empty
    //- longHand
    if (var1 === null || var1 === undefined || var1 === '') {
        var2 = 'Sin valor';
    } else {
        var var2 = var1;
    }
    //- shortHand
    var var2 = var1  || 'Sin valor';

// 3 - execute function if condition is true
    function myfunction(){...}
    //- longHand
    if (result) {
        myfunction();
    }
    //- shortHand
    result && myfunction();

// 4 - loop for
    //- longHand
    for (var i = 0; i < allItems.length; i++)
    //- shortHand
    for(var i in allItems)