使用JSON从对象数组创建属性数组

function Person(name, favouriteColour) {
   this.Name = name;
   this.FavouriteColour = favouriteColour;
}

var group = [];

group.push(new Person("Bob", "Green"));
group.push(new Person("Jane", "Red"));
group.push(new Person("Jack", "Blue"));

What could I do to get an array of Names from group?

我怎样才能从组中获取一系列名称?

group.??? -> ["Bob", "Jane", "Jack"]

In c#, the same as: group.ConvertAll<string>(m => m.Name)

在c#中,与:group.ConvertAll 相同(m => m.Name)

4 个解决方案

#1

I'll offer the obvious one with straight javascript that works in all browsers:

我将提供明显的一个直接javascript,适用于所有浏览器:

var names = [];
for (var i = 0; i < group.length; i++) {
    names.push(group[i].Name);
}

Or with jQuery (using it's .map utility method):

或者使用jQuery(使用它的.map实用程序方法):

var names = $.map(group, function(item) {return(item.Name);});

Or, if you install a .map shim to make sure the .map Array method is available in all browsers:

或者,如果您安装.map填充程序以确保所有浏览器都可以使用.map Array方法:

var names = group.map(function(item) {return(item.Name);});

#2

I think you'll just have to loop over the array and get the names that way.

我认为你只需循环遍历数组并获得这样的名称。

function getKeysArray(key, objArray) {
    var result = [], l = objArray.length;
    for (var i = 0; i < l; i++) {
        result.push(objArray[i][key]);
    }
    return result;
}

alert(getKeysArray("Name", group));

JSFiddle Example

You could also try a seperate library like LINQ to JavaScript which looks quite useful.

您也可以尝试一个单独的库,如LINQ to JavaScript,看起来非常有用。

#3

You could use .map, but it's not available in older browsers.

您可以使用.map,但它在旧版浏览器中不可用。

// names is group's Name properties
var names = group.map(function(value) { return value.Name; });

#4

In JavaScript 1.6 and later:

在JavaScript 1.6及更高版本中:

group.map(function(p) { return p.Name; });

group.map(function(p){return p.Name;});

#1