angularjs将json对象转换为数组

Question

嗨，我有这样的json返回对象

color_selected = [
                { id: 4}, 
                { id: 3} 
    ];

我如何将其转换为

color_selected = [4,3]

感谢您的帮助和建议

Answer 1

您可以像这样遍历它：

var newArray = [];
for(var i = 0; i < color_selected.length; i++) {
    newArray.push(color_selected[i].id);
}

Answer 2

您可以使用javascript map功能

var newArray = color_selected.map(o=> o.id)

 var color_selected = [ { id: 4}, { id: 3} ]; var newArray = color_selected.map(o=> o.id) console.log(newArray) 

Answer 3

color_selected = [
            { id: 4}, 
            { id: 3} 
];

您可以使用lodash

//在3.10.1中

_.pluck(color_selected, 'id'); // → [4, 3]
_.map(color_selected, 'id'); // → [4, 3]

//在4.0.0中

_.map(color_selected, 'id'); // → [4, 3]

Answer 4

将Array.map（）方法与ES6 Arrow运算符一起使用。

 var color_selected = [ { id: 4}, { id: 3} ]; color_selected = color_selected.map(item => {return item.id }); console.log(color_selected);