AngularJS – angular.isArray() 函数
AngularJS 中的 angular.isArray() 函数主要用于检查一个引用是否是数组。如果函数中传入的引用是数组类型,此方法将返回 True,否则将返回 False。
语法
angular.isArray(value)
示例 − 检查引用是否是数组
在您的 Angular 项目目录中创建一个 “isArray.html” 文件,然后粘贴以下代码片段。
<!DOCTYPE html> <html> <head> <title>angular.isArray()</title> <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.2/angular.min.js"></script> </head> <body ng-app="app" style="text-align:center"> <h1 style="color:green"> Welcome to Tutorials Point </h1> <h2>AngularJS | angular.isArray()</h2> <div ng-controller="example"> <b>Value: {{value}}</b> <br><br> {{isArray}} <br><br> <b>Value: {{value2}}</b> <br><br> {{isArray1}} <br><br> <b>Value: {{value3}}</b> <br><br> {{isArray2}} <br><br> <b>Value: {{value4}}</b> <br><br> {{isArray3}} </div> <!-- Script for passing the values and checking... --> <script> var app = angular.module("app", []); app.controller('example',['$scope', function ($scope) { // Defining the keys & values $scope.value = []; $scope.value2 = null; $scope.value3 = [{id:'1'},{id:'2'},{id:'3'},{id:'4'},{id:'5'}]; $scope.value4 = [1,2,3,4,5]; $scope.isArray = angular.isArray($scope.value) == true ? "$scope.array is an Array." : "$scope.array is not an Array."; $scope.isArray1 = angular.isArray($scope.value2) == true ? "$scope.array is an Array." : "$scope.array is not an Array."; $scope.isArray2 = angular.isArray($scope.value3) == true ? "$scope.array is an Array." : "$scope.array is not an Array."; $scope.isArray3 = angular.isArray($scope.value4) == true ? "$scope.array is an Array." : "$scope.array is not an Array."; }]); </script> </body> </html>
输出
要运行以上代码,只需转到您的文件并将其作为普通 HTML 文件运行即可。您将在浏览器窗口中看到以下输出。
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