javascript - 当第二个元素应该被推送时，json 键被分配一个数字而不是数组

Question

我正在尝试生成一个 JSON 对象，我希望它看起来像这样:

{
 "sreddy-vm-1":["MyDatabase-1"],
 "sreddy-vm-2":["MyDatabase-2"], 
 "sreddy-vm-3":["MyDatabase-3", "MyDatabase-4", "MyDatabase-5"]
} 

但是它生成了这个

{"sreddy-vm-1":["MyDatabase-1"],"sreddy-vm-2":["MyDatabase-2"], "sreddy-vm-3":3}

生成正确的 json，直到每个键在数组中都有一个元素，将第二个元素添加到 sreddy-vm-3 数组中时，它会分配 2，然后在下一个(最后一个)循环最终分配 3。我不明白发生了什么事。总的来说，我对 Javascript 很陌生。请帮忙。谢谢!

代码

// part of the code
$scope.forests = ["MyDatabase-1", "MyDatabase-2", "MyDatabase-3", "MyDatabase-4", "MyDatabase-5"];
$scope.forestsOnHosts = {};
angular.forEach($scope.forests, function(forest, key){
    $scope.forestsOnHosts[host] = function () {
        if ($scope.forestsOnHosts[host] === undefined || $scope.forestsOnHosts[host] === null) {
            console.log('******************');
            return new Array(forest);
        } else {
            console.log(JSON.stringify($scope.forestsOnHosts[host]));
            var arr = new Array($scope.forestsOnHosts[host]);
            return arr.push(forest);
        }
    }.call();
}
console.log(JSON.stringify($scope.forestsOnHosts));

Answer 1

return arr.push(forest);

这不会返回一个数组，正如您所期望的那样。

arr.push(forest);
return arr;