CODEWITHSUNDEEP
javascriptjqueryarrays
Martin Broder
Martin Broder

Reputation: 221

how to check an array.. within an array? jquery

I'd like to know how to check an array that got several variables in it.. something like that. I can explain better with the code shown:

// Ignore the words in here, they are just there to explan.
var $array = [
  alpha = {
    name : $('.a'),
    date : $('.b'),
    street: $('.c')
  },
  beta = {
    name : $('.x'),
    date : $('.y'),
    street: $('.z')
  }      
];

/* So now I got this arrays.. withing an array? is that correct?
 * or what is this called?
 * and now I want to check each object's length, if its 0 -> return false and
 * throw out an error, if >= 1 go on and check the next. */

// Check if all needed elements for the toggle to work are existent 
$.each( $array, function(key, value) {
  if ( !value.length ) {
    alert("Could not find "+ '"' + value.selector +'"!')
    return false
  };
});
// Well obviously this doesnt work..

Thanks in advance!

Upvotes: 0

Views: 134

Answers (1)

outis
outis

Reputation: 77400

You can loop over the names of properties of an object with a for (... in ...) loop:

/* since the array isn't a jQuery object, don't prefix the name with `$` */
var things = [
    /* array elements have integer, not string, indices. In any case, 
       "alpha = ..." is the wrong syntax to set properties. What it
       does is set a variable named "alpha".
     */
    {...},
    {...},
];

$.each(things, function(idx, item) {
  for (p in item) {
    if (! item[p].length) {
      /* alerts are disruptive; use other means of informing
         the user or developer.
       */
      //alert("Could not find "+ '"' + value.selector +'"!')
      return false;
    } /* blocks don't need semicolon separators */
  }
});

See also "For .. in loop?"

Upvotes: 1

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