[英]How to add new elements to the object of an array on javascript
I have an var arr = [{name:"Joe"}, {name:"Mark"}];
我有一个
var arr = [{name:"Joe"}, {name:"Mark"}];
I have the age array like var ageArr = [{age: 24}, {age: 30}]
我有一个年龄数组,如
var ageArr = [{age: 24}, {age: 30}]
I need to programatically add the respective age of the objects 我需要以编程方式添加对象的各自年龄
My array need to looks like var arr = [{name:"Joe", age: 24}, {name:"Mark", age: 30}];
我的数组需要看起来像
var arr = [{name:"Joe", age: 24}, {name:"Mark", age: 30}];
I am using javascript and included the library underscore.js. 我正在使用javascript,并包含了underscore.js库。
Is there a cleaner way to achieve this. 有没有更清洁的方法来实现这一目标。 could some one help with a code snippet for this.
有人可以为此提供帮助的代码段。
you can 您可以
var newArr = arr.map(function(v, i) {
return _.extend(v, ageArr[i]);
});
If you don't like using a free variable ageArr
and access by index - you could zip
them first: 如果您不喜欢使用自由变量
ageArr
并按索引访问-您可以先将其zip
:
var newArr = _.zip(arr, ageArr).map(function(v) {
return _.extend(v[0], v[1]);
});
JSFiddle: http://jsfiddle.net/wrq2Lo8m/ JSFiddle: http : //jsfiddle.net/wrq2Lo8m/
You can use simple Javascript code to achieve this. 您可以使用简单的Javascript代码来实现此目的。
var arr = [{name:"Joe"}, {name:"Mark"}]; var ageArr = [{age: 24}, {age: 30}] var newArr = [] for(var i =0 ; i < arr.length ; i++) { var newObj = new Object(); newObj.name = arr[i].name; newObj.age = ageArr[i].age; newArr.push(newObj) } alert(JSON.stringify(newArr))
Click on Run Code Snippet 单击运行代码片段
The most straightforward way: 最直接的方法:
// make sure names and ages are same length
function mapNameWithAge(names, ages) {
var len = names.length,
ans = [];
for(var i=0;i<len;i++) {
var obj = {
"name": names[i].name,
"age": ages[i].age
}
ans.push(obj);
}
return JSON.stringify(ans)
}
var arr = [{name:"Joe"}, {name:"Mark"}],
ageArr = [{age: 24}, {age: 30}];
var result = mapNameWithAge(arr, ageArr);
console.log(result);
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