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docs(minerr): Adds a description for ngRepeat.dupes #3439

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docs(minerr): Adds a description for ngRepeat.dupes #3439

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8 changes: 8 additions & 0 deletions docs/content/error/ngRepeat/dupes.ngdoc
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@name ngRepeat:dupes
@fullName Duplicate Repeater Key
@description

Occurs if there are duplicate keys in an ng-repeat expression. Duplicate keys are banned because AngularJS uses keys to associate DOM nodes with items.

By default, collections are keyed by value, so ng-repeat="value in [4, 4]" will trigger this error.

To resolve this error, use the 'track by' syntax for ng-repeat.
e.g. ng-repeat="value in [4, 4] track by $index" will cause the items to be
keyed by their position in the array instead of their value.
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@petebacondarwin petebacondarwin Aug 3, 2013

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Nice example! Lot's of people are likely to get caught out by this at some point.