angularjs將json對象轉換為數組

Question

嗨，我有這樣的json返回對象

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

我如何將其轉換為

color_selected = [4,3]

感謝您的幫助和建議

Answer 1

您可以像這樣遍歷它：

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

將Array.map（）方法與ES6 Arrow運算符一起使用。

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