How to check if Object has empty arrays with underscore.js or jQuery

Question

Is there a "better" way to check if an object has empty arrays (0-*) than this:

emptyArr: function() {
        var obj = getObj();
        return obj.abc.length == 0 || obj.def.length == 0 || obj.ghi.length == 0 || obj.jkl.length == 0 …………;
}

Edit: Here is how the object looks like:

- Object
  - abc = []
  - def = []
  - ghi = []
  - jkl = []
  - …

I want to check if the object contains any empty arrays.

Any help would be greatly appreciated.

Can't you loop through them and break out of loop as soon as you hit an empty array? — Huangism
– Huangism, Commented Sep 15, 2014 at 19:34

joews · Accepted Answer · 2014-09-15 19:34:18Z

5

Is the question "Check if an object has any empty array members"?

If so:

function hasEmptyArrays(obj) {
  var emptyArrayMembers = _.filter(obj, function(member) { 
    return _.isArray(member) && _.isEmpty(member)
  });

  return emptyArrayMembers.length > 0;
}

edited Sep 15, 2014 at 19:34

answered Sep 15, 2014 at 19:28

joews

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