Updating an AngularJS scope variable without the need for redundant re-repetition

Currently, I am facing an issue where I am assigning items to the scope like so:

$scope.items = [{
   name: 'one',
   value: 1
}{
   name: 'two',
   value: 2
}]

I am using ng-repeat to display these items. There's a service that updates the data in this scope variable every few seconds. However, the problem is that each update causes a re-iteration. I attempted to use angular.forEach to iterate through the existing data in the scope and the new data, updating values at corresponding keys. Unfortunately, this method does not seem to reflect the updated values that have already been iterated.

The constant re-iteration upon updates is causing issues with styles applied within a directive. The re-rendering process often overrides these style changes, making it quite inefficient as there may be only one or two items with actual updates. Does anyone have a viable solution for this dilemma?

Any help would be greatly appreciated!

Answer №1

Visit ngRepeat documentation

One of the fantastic features of ng-repeat is the "track by" option, which allows you to track objects with a unique identifier such as an `id`. Here's how you can implement it:

<span ng-repeat="item in items track by item.id">{{item.name}}</span>

I have extensively tested this feature and it works like a charm. Previously, I had to manually use $$hash, but now with "track by", everything runs smoothly.

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