javascript multidimensional array loop

Question

I have some jquery code which I'm trying to re-write into basic javascript.

The problem is I have this multidimensional array and I'm not sure how I would write a for loop for this?

  $.each(wordcount, function(w, i) {
      if (i > 1) {
          constrain++;
          if (constrain <= 2) {
              topwords.push({
                  'word': w,
                  'freq': i
              });
          }
      }
  });

Can you provide an example of the values in the array?

Jordumus
– Jordumus

2016-04-29 10:18:18 +00:00
Commented Apr 29, 2016 at 10:18 — Jordumus
– Jordumus, Commented Apr 29, 2016 at 10:18

Rory McCrossan · Accepted Answer · 2016-04-29 10:19:03Z

2

You could do this with a single for loop:

for (var i = 0; i < wordcount.length; i++) {
    var w = wordcount[i];
    if (i > 1) {
        constrain++;
        if (constrain <= 2) {
            topwords.push({
               'word': w,
                'freq': i
            });
        }
    } 
}

answered Apr 29, 2016 at 10:19

Rory McCrossan

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3 Comments

Amy Neville Over a year ago

Oh yes I see - I can use .length :)

Praveen Kumar Purushothaman Over a year ago

@AmyNeville That's the traditional way of traversing or walking through Arrays.

Rory McCrossan Over a year ago

@AmyNeville Glad to help

Ravi Tiwari · Accepted Answer · 2016-04-29 10:31:43Z

1

We have Array.prototype.forEach method in JS. You could use it like

wordcount.forEach(function(w, i) {
    if (i > 1) {
      constrain++;
      if (constrain <= 2) {
          topwords.push({
              'word': w,
              'freq': i
          });
      }
    }
});

answered Apr 29, 2016 at 10:31

Ravi Tiwari

9729 silver badges18 bronze badges

2 Comments

Amy Neville Over a year ago

Interesting, is that just as compatible as JQuery?

Ravi Tiwari Over a year ago

Yes indeed. Even this is more of a functional style of writing and recommended way. I would suggest you to also look for Array.prototype.map and other methods

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