Question

96

rated 0 times [ 99] [ 3] / answers: 1 / hits: 81036 / 11 Years ago, wed, may 15, 2013, 12:00:00

I have a JSON string as:

  var Str=[{ 'label': 'Month'},{ label: 'within'},{ label: 'From'},

         { label: 'Where'},];

I converted it into an objects by eval:

      var tagString = eval(Str);

I want to get the index of month without a loop.

Is there a better way to get the index of an object in an array without using loops?

Thanks in advance!

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4 Years ago

answered 11 Years ago irvingcarloe · Accepted Answer

If those are all labels, you could change the structure like this, so it's An array of labels which, in my opinion, would be more proper.

var Str = '[Month,within,From,Where]';

Then parse it them with JSON.parse, or since you are using jQuery, $.parseJSON to get it to work on more browsers:

var labels = JSON.parse(Str);

labels should now be an array, which you can use Array.indexOf.

var index = labels.indexOf('Month');

It's ES5 and most modern browsers support it. For older browsers, you need a polyfill which unfortunately... also uses a loop.