JSFiddle - React, Tailwind, and code Playground
by Alexander
HTML
<div id="app" ng-app="myApp" >
<div ng-controller='myCtrl'>
<div>{{tarray.indexOf("5")}}
</div>
</div>
JavaScript
var myApp = angular.module('myApp', []);
myApp.controller('myCtrl', function ($scope) {
$scope.tarray=[["1"],["2"],["5"]];
});