Question

我想比较这两个函数的variable值。不幸的是，我试图制作variables global，但我不断获得undefined。

'use strict';

/**
 * @ngdoc function
 * @name dashyAppApp.controller:Dashy3Ctrl
 * @description
 * # Dashy3Ctrl
 * Controller of the dashyAppApp
 */

angular.module('dashyAppApp')
  .controller('Dashy3Ctrl', function ($rootScope, $scope, employees, $interval) {
   var _this = this;

  $scope.getData = function() { // getDATA function
    employees.getEmployees().then(function(response){
        _this.items = response.data;
        $scope.items = _this.items;

       callmecrazy(response.data);
    });

  }// End getDATA function
  $scope.getData();

  $scope.getDataB = function() {
  employees.getEmployees().then(function(response){
    _this.items = response.data;
     callmecrazier(response.data);
  });
 }
 $interval(function(){
 $scope.getDataB();
 }, 10000);

 function callmecrazier(response1){
   callmecrazierVal = response1.countries;
    return callmecrazierVal;
 }

 function callmecrazy(response){
  callmecrazyVal = response.countries;
  return callmecrazyVal;
 }

 if(!angular.equals(callmecrazierVal(), callmecrazyVal())) {
    //trigger some other function
  }
});

我想查看是否callmecrazierVal !== callmecrazyVal。这是我上面的完整controller代码。

if(callmecrazierVal !== callmecrazyVal){
  //trigger some other function
}

Answer 1

您应该从功能中返回一些内容。返回的值将被比较。

function callmecrazier(response1){
   var callmecrazierVal = response1.countries;
    return callmecrazierVal;
 }

 function callmecrazy(response){
  var callmecrazyVal = response.countries;
  return callmecrazyVal;
 }

然后将它们比作：

if(callmecrazierVal() !== callmecrazyVal()){
  //trigger some other function
}

Answer 2

如果函数返回的值不是原语，则应该：

if(!angular.equals(callmecrazier(), callmecrazy()) {
   //trigger some other function
}

修改我假设你想以10秒的间隔命中api并检查是否有任何变化，对吧？（否则，请澄清你想要达到的目标）。如果需要，您需要链接异步调用，然后进行比较，如下所示：

'use strict'; /** * @ngdoc function * @name dashyAppApp.controller:Dashy3Ctrl * @description * # Dashy3Ctrl * Controller of the dashyAppApp */ angular.module('dashyAppApp') .controller('Dashy3Ctrl', function($rootScope, $scope, employees, $interval) { var _this = this; $scope.getData = function() { // getDATA function return employees.getEmployees().then(function(response) { return response.data; }); } // End getDATA function $scope.getData() .then(function(data1){ $scope.items = data1; $interval(function() { $scope.getData() .then(function(data2){ if (!angular.equals($scope.items, data1) { //trigger some other function } }); }, 10000); }); });

Answer 3

function callmecrazier(response1){
   var callmecrazierVal = response1.countries;
   return callmecrazierVal;
}

function callmecrazy(response){
   var callmecrazyVal = response.countries;
   return callmecrazyVal;
}

if(callmecrazier(response1) !== callmecrazy(response)){
   //Your code...........
}

如何比较这两个函数之间的值？

3 个答案: