在对象数组中向后循环 JavaScript
javascriptweb developmentobject oriented programming更新于 2025/10/29 16:44:17
我们有一个像这样的对象数组 −
let data = [
{id:1, Name: "Abe", RowNumber: 1 },
{id:2, Name: "Bob", RowNumber: 2 },
{id:3, Name: "Clair", RowNumber: 3 },
{id:4, Name: "Don", RowNumber: 3.0 },
{id:5, Name: "Edna", RowNumber: 3.1 },
{id:6, Name: "Frank", RowNumber: 3.2 },
{id:7, Name: "Gabe", RowNumber: 4 },
{id:8, Name: "Helen", RowNumber: 5 },
{id:9, Name: "Isabelle", RowNumber: 6 },
{id:10, Name: "Jane", RowNumber: 7 },
{id:11, Name: "Ken", RowNumber: 8 },
];
我们需要编写一个 JavaScript 函数，该函数接收此数组并返回一个字符串，该字符串的名称从最后一个对象开始一直到第一个对象，并以"，"分隔。
让我们来编写该函数的代码 −
示例
const data = [
{id:1, Name: "Abe", RowNumber: 1 },
{id:2, Name: "Bob", RowNumber: 2 },
{id:3, Name: "Clair", RowNumber: 3 },
{id:4, Name: "Don", RowNumber: 3.0 },
{id:5, Name: "Edna", RowNumber: 3.1 },
{id:6, Name: "Frank", RowNumber: 3.2 },
{id:7, Name: "Gabe", RowNumber: 4 },
{id:8, Name: "Helen", RowNumber: 5 },
{id:9, Name: "Isabelle", RowNumber: 6 },
{id:10, Name: "Jane", RowNumber: 7 },
{id:11, Name: "Ken", RowNumber: 8 },
];
const buildString = arr => {
let str = '';
for(let i = arr.length-1; i > -1; i--){
str += `${arr[i]["Name"]}, `;
};
return str.substring(0, str.length-2);
};
console.log(buildString(data));
输出
控制台中的输出将是 −
Ken, Jane, Isabelle, Helen, Gabe, Frank, Edna, Don, Clair, Bob, Abe
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有用资源
javascript 参考教程 - 该教程包含有关 javascript 的更多信息:https://www.cainiaomax.com/javascript/
