Question

So I have this array:

[first_name: false, last_name: false, email: false, month: false, day: false, year: false, password: false, password2: false]

Now I if I do this console.log(arrayName.length) it will return 0; why? What I’m doing wrong?

//LE

This is how I do it:

var errors = {};
 $('.register-front').delegate('button','click',function(){
  var $this = $(this).parent().parent().parent();
  $this.find('input,select').each(function(){
    if(!$(this).val() || ($(this).val() == '-1'))
    {
      errors[$(this).attr('name')] = false;
    }
  });
  console.log(errors.length);
  return false;
 });

I made some changes but I still don’t get it….

Answer 1

Your notation seems odd. The square brackets are for an array, but the contents are object attribute/value notation. I don’t think that will work. You can turn your expression into an object by replacing the [] with {}, but then, objects don’t have length. You can get the number of keys in an object with:

Object.keys(obj).length

Alternatively, you can iterate through the object keys with:

for (var key in obj) {
    . . .
}

EDIT For the specific code you added, you can replace this line:

console.log(errors.length);

with:

console.log(Object.keys(errors).length);