How to compare variables using Javascript?

Question

I use a lot of variable comparison. Example:

 if (item[l].item[0] == 'tipoRescisao') {
                log.info('Tipo Rescisão: ' + item[l].item[1])
                if (
                    (item[l].item[1] == (1))
                        || (item[l].item[1] == 01)
                        || (item[l].item[1] == 08)
                        || (item[l].item[1] == 10)
                        || (item[l].item[1] == 12)
                        || (item[l].item[1] == 13)
                    ) {
                    prazo = dataDesligamento + 24;
                }
            }

There is another way to make these comparisons more succinctly?

Answer 1

I believe the easiest way would be to search in a array of the values to be compared. If array is because the variable is worth at least one of these values. There are people who even have some function to abstract it.

if ([1, 8, 10, 12, 13].indexOf(item[l].item[1]) > -1) {
    prazo = 20;
}

var prazo = 0;
var x = 8;
if ([1, 8, 10, 12, 13].indexOf(x) > -1) prazo = 20;
console.log(prazo);
var prazo = 0;
var x = 7;
if ([1, 8, 10, 12, 13].indexOf(x) > -1) prazo = 20;
console.log(prazo);

I put in the Github for future reference.

Answer 2

You can make this type of checking simpler by using indexOf.

first create a array as all the possibilities you want.

['1', '01', '08', '10', '12', '13']

After just check if the value you are looking for is inside this array through the indexOf

['1', '01', '08', '10', '12', '13'].indexOf(item[l].item[1])

If the result found is -1 then the value does not exist in the array research.

So yours if would be :

// Função simples
function inArray(value, array){
  return array.indexOf(value) != -1;
}

console.log(inArray('01', ['01', '10']));

// Aplicada ao prototype de string
String.prototype.inArray = function(array){
  return inArray(this.toString(), array);
}

console.log('01'.inArray(['01', '10']));

Answer 3

You will need to check which type of value item[l].item[1].

Type string: If it’s "01," you’ll have to do it this way

if(valor item[l].item[1] === "01")...

Type Int: If it’s 1, you’ll have to do it this way

if(valor item[l].item[1] === 1)...