How to get the array index using AngularJS filter

Question

I get this filter:

userInfo = $filter('filter')(userArray, {userId: userId});

and got the userInfo object. Is there anyway that I can find out which array index of userArray. Thanks

Possible duplicate of AngularJS: find the index position of filtered value in the original array — Anurag Srivastava
– Anurag Srivastava, Commented Mar 1, 2019 at 13:13

mimetist · Accepted Answer · 2019-02-15 22:14:03Z

0

Following the docs, you can see that you can use a function instead of the object {userId: userId}. https://docs.angularjs.org/api/ng/filter/filter#filter-arguments

Right now your code should be equivalent to the following:

userInfo = $filter('filter')(userArray, function(element, index) {
    if (element.userId == userId) return true;
});

Note that the function added to the filter contains the index that you need.

You may change the function to make use of that index, but bear in mind that you must return true only for the elements that you want to pass the filter.

answered Feb 15, 2019 at 22:14

mimetist

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2 Comments

mimetist Over a year ago

You are welcome! But don't forget to mark my answer as correct! :-)

kim Over a year ago

Sorry, Another question. I really want to return the index because I need to use this index to update the data outside of this function(function(element, index) lll

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