[ngRepeat:dupes] Duplicates in a repeater are not allowed. Use 'track by' expression to specify uniq

angularjs 使用ng-repeat报错

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1.       
2. <div ng-init="words = ['高校','高校','高校']" ng-repeat="word in words">  
3.     {{word}}  
4. </div>  

[ngRepeat:dupes] Duplicates in a repeater are not allowed. Use 'track by' expression to specify unique keys

  发现是因为相同的内容重复引起，解决方案

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1. <div ng-init="words = ['高校','高校','高校']" ng-repeat="word in words track by $index">  
2.     {{word}}  
3. </div>  

在ng-repeat后面加上

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1. track by $index