[英]How to concatenate or merge two arrays
I have two array variables: var1
and var2
. 我有两个数组变量:
var1
和var2
。
$scope.var1 = {
"0":{"subjectId":"1","subjectShortName":"English","subjectCode":null,"IsSelected":true},
"1":{"subjectId":"2","subjectShortName":"Hindi","subjectCode":null,"IsSelected":true}
};
$scope.var2 = {"classId":"3","typeOfSubject":"main"}
How I can merge or concatenate these two arrays to get the kind of array below? 我如何合并或连接这两个数组以获得下面的那种数组? Basically I want to add all
subjectId
as Key to second array. 基本上我想将所有
subjectId
添加为第二个数组的Key。
$scope.var2 = {"classId":"3","typeOfSubject":"main", "subjectId":"{1,2}"}
In your exemple you are using objects not arrays. 在你的例子中,你使用的是对象而不是数组。 But I leave here how to join two objects.
但我离开这里如何加入两个对象。 https://docs.angularjs.org/api/ng/function/angular.extend
https://docs.angularjs.org/api/ng/function/angular.extend
In your case: 在你的情况下:
$scope.new_var = angular.extend({}, $scope.var1, $scope.var2)
. 。
If you intend to use array I do not know a native function in angularjs. 如果你打算使用数组,我不知道angularjs中的原生函数。
You can use jquery > http://api.jquery.com/jquery.merge/ 你可以使用jquery > http://api.jquery.com/jquery.merge/
Or javascript 或者javascript
var hege = ["Cecilie", "Lone"];
var stale = ["Emil", "Tobias", "Linus"];
var children = hege.concat(stale);
Your expectation is not clear. 你的期望不明确。 Anyway following your request here it is.
无论如何,按照你的要求,它是。 It will add the subjectIds of
var1
into var2
as a list of integers. 它会将
var1
的subjectIds作为整数列表添加到var2
中。
var subjectIds = [];
for(var k in $scope.var1) {
subjectIds.push(parseInt($scope.var1[k].subjectId));
}
$scope.var2.subjectId = subjectIds.join(', ');
Results into 结果成
{ classId: '3', typeOfSubject: 'main', subjectId: "1, 2" }
It looks like you want to merge these objects so the result looks like: 看起来您想要合并这些对象,结果如下所示:
{
"classId": "3",
"typeOfSubject": "main",
"subjectId": {
"1": {"subjectId": "1", "subjectShortName": "English", ...}
"2": {"subjectId": "2", "subjectShortName": "Hindi", ...}
}
}
This doesn't require any angular support to accomplish, but you can use angular.forEach
to iterate your var1
object easily: 这不需要任何角度支持,但您可以使用
angular.forEach
轻松迭代var1
对象:
$scope.var2.subjectId = {};
angular.forEach($scope.var1, function(subject){
this[subject.subjectId] = subject;
}, $scope.var2.subjectId); //set "this" to the member of var2 we're populating
These are objects, not array.. note that array have this []
brackets, while objects are {}
just like your code.. in this case you want to join a new object into your constructed object.. 这些是对象,而不是数组..请注意,数组有这个
[]
括号,而对象就像你的代码一样.. {}
在这种情况下,你想要将一个新对象加入到你构造的对象中。
Your problem has already been solved in this post here 你的问题已经在这篇文章中解决了
But if you wish to see a smaller code.. would be using extends
function in AngularJS
according to the docs here 但是如果你希望看到一个更小的代码..根据这里的文档,将在
AngularJS
使用extends
函数
angular.extends(yourObject, objectToJoin, ...);
note that this function is inherited from jQuery
and you can check the jQuery
docs version in here 请注意,此函数继承自
jQuery
,您可以在此处查看jQuery
文档版本
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