如何比较两个函数不同的数组？

Question

 var app2 = angular.module("webApp2", []) .controller("webCtrl2", function ($scope, $window, $state, $http) { console.log("hi " + $state.params.usermail); $scope.uName = $state.params.usermail; $scope.useriden = $state.params.user; console.log("hbdhakkdjf" + " " + $scope.uName) //$scope.data = $window.sessionStorage.getItem("Mydata"); //console.log("data "+$scope.data); var usersList = []; var frndsAdded = []; $http.get("http://192.168.2.3:3000/userslist") .then(function (response) { usersList = response.data; //$scope.friendsList = response.data; //................................................................. $http.get("http://192.168.2.3:3000/sendfriendrequests/" + $scope.uName) .then(function (response) { frndsAdded = response.data; }, function (response) { console.log("error"); }); // console.log("array print" + JSON.stringify($scope.usersList)); }, function (response) { console.log("response"); }); console.log(frndsAdded); console.log("print userid" + $scope.useriden); $scope.addFrnd = function (frnd, index) { var data = { "userId": $scope.useriden, "requestname": frnd, "username": $scope.uName }; console.log(data); var req = { method: 'POST', url: 'http://192.168.2.3:3000/friendrequests', data: data } $http(req).then(function (response) { console.log("hjhuhjh" + JSON.stringify(response.data)); $scope.usersList.splice("index"); }, function (response) { console.log(JSON.stringify(response)); }); } $scope.logoutFn = function () { $state.go("signup"); } }); 

 <nav class="navbar navbar-default well well-sm"> <div class="container-fluid"> <div class="navbar-header"> <a class="navbar-brand" href="#">WebChat</a> </div> <ul class="nav navbar-nav pull-right"> <li><a href="#">Home</a></li> <li style = margin-top:5%> <div class = "dropdown"> <a href="#" data-toggle="dropdown"> <i class="glyphicon glyphicon-user"></i>Add Friends<span class = "caret"></span> </a> <ul class = "dropdown-menu list-group" style = " overflow: scroll"> <!--<li class = "list-group-item" ng-repeat = "seeFrnd in usersList track by $index" ng-bind = "seeFrnd.username">name <button class = "btn btn-primary" ng-click = "addFrnd()">Add Friend</button> </li>--> <li class = "list-group-item" ng-repeat = "seeFrnd in usersList track by $index"><span ng-bind="seeFrnd.username"></span> <button class = "btn btn-primary btn-sm" ng-click = "addFrnd(seeFrnd.username,$index)" class = "buttn" style="float: right">Add Friend</button> </li> </ul> </div> </li> <li> <a href="#" ng-bind="uName"></a> </li> <li><a href="#" ng-click="logoutFn()">Logout</a></li> </ul> </div> </nav> <div ui-view></div> 

我在这里做聊天应用程序，我得到两个数组。一个数组用于用户列表，另一个数组用于朋友列表。两个数组的功能不同。我需要比较两个数组。我该怎么做？

Answer 1

angular.forEach(arr1, function(value1, key1) {
        angular.forEach(arr2, function(value2, key2) {
            //Comparison logic
        });
    });

Answer 2

在$ scope上定义两个数组。 在获取第二个数组值之后，必须使用逻辑比较第二个API调用中的两个数组。 如果要在外部执行此操作，则必须等待异步API调用完成，以便获得完整的数组。

 $scope.usersList = [];
    $sccope.frndsAdded = [];
    $http.get("http://192.168.2.3:3000/userslist").then(function(response) {
        $scope.usersList = response.data;
        //$scope.friendsList = response.data;
        //.................................................................
        $http.get("http://192.168.2.3:3000/sendfriendrequests/" + $scope.uName).then(function(response) {
            $scope.frndsAdded = response.data;
            //Comaprison Logic
            for (var i = 0; i < $scope.usersList.length; i++) {
                for (var j = 0; j < $scope.frndsAdded.length; j++) {
                    if ($scope.usersList[i].request == $scope.frndsAdded[j].request)
                    //ur logic
                }
            }
        }, function(response) {
            console.log("error");
        });
        // console.log("array print" + JSON.stringify($scope.usersList));
    }, function(response) {
        console.log("response");
    });