将ID添加到对象数组 [英] Add id to array of objects

问题描述

我有一个对象数组.如何从1开始向他们添加ID密钥.

I have an array of objects. How do I add an id key to them starting from 1.

[
{
    color: "red",
    value: "#f00"
},
{
    color: "green",
    value: "#0f0"
},
{
    color: "blue",
    value: "#00f"
},
{
    color: "cyan",
    value: "#0ff"
},
{
    color: "magenta",
    value: "#f0f"
},
{
    color: "yellow",
    value: "#ff0"
},
{
    color: "black",
    value: "#000"
}
]

所以，就像

[
{
    color: "red",
    value: "#f00",
    id: 1
},
{
    color: "green",
    value: "#0f0",
    id: 2
},
{
    color: "blue",
    value: "#00f",
    id: 3
},
{
    color: "cyan",
    value: "#0ff",
    id: 4
},
{
    color: "magenta",
    value: "#f0f",
    id: 5 
},
{
    color: "yellow",
    value: "#ff0",
    id: 6
},
{
    color: "black",
    value: "#000",
    id: 7
}
]

我尝试使用 forEach ，但是它返回了 id 作为长度-数组内所有对象的1值.

I tried using forEach but it was returning the id as the length - 1 value for all the objects inside the array.

我有很多对象，也可以使用 lodash .

I have a large number of objects and can use lodash too.

推荐答案

您可以使用

const source = [{
    color: "red",
    value: "#f00"
  },
  {
    color: "green",
    value: "#0f0"
  },
  {
    color: "blue",
    value: "#00f"
  },
  {
    color: "cyan",
    value: "#0ff"
  },
  {
    color: "magenta",
    value: "#f0f"
  },
  {
    color: "yellow",
    value: "#ff0"
  },
  {
    color: "black",
    value: "#000"
  }
];

source.forEach((item, i) => {
  item.id = i + 1;
});

console.log(source);

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