如何在 NodeJs 中将字符串转换为数组答案

【问题标题】：How to convert string in to Array in NodeJs如何在 NodeJs 中将字符串转换为数组
【发布时间】：2020-08-23 07:46:20
【问题描述】：

我有这个字符串：

    var d = [
    '[(not set),20200409,103,0.0]',
    '[(not set),20200410,112,0.0]',
    '[(not set),20200411,56,0.0]',
    '[(not set),20200412,58,0.0]',
    '[(not set),20200413,108,0.0]',
    '[(not set),20200414,91,0.0]'];

但是我想要这种类型的数组通过转换字符串d 处理后的样子。

    var processd_array = [
     ['(not set)',20200409,103,0.0],
     ['(not set)',20200410,112,0.0],
     ['(not set)',20200411,56,0.0],
     ['(not set)',20200412,58,0.0],
     ['(not set)',20200413,108,0.0],
     ['(not set)',20200414,91,0.0] ];

如何在 Nodejs 中做到这一点？

【问题讨论】：

你应该展示你已经尝试过的东西。见stackoverflow.com/help/how-to-ask。
您的字符串语法错误，并且在处理数组语法后也是错误的。您在错误的地方使用了反引号！

标签： javascript arrays node.js string

【解决方案1】：

首先让我们将d 数组中的每个元素拆分为多个片段。

var d= [
  '[(not set),20200409,103,0.0]',
  '[(not set),20200410,112,0.0]',
  '[(not set),20200411,56,0.0]',
  '[(not set),20200412,58,0.0]',
  '[(not set),20200413,108,0.0]',
  '[(not set),20200414,91,0.0]'];
 
const result = d.map(item => item.split(','));

console.log(result);

这可行，但它不会从每行的开头和结尾删除[] 字符。

让我们解决这个问题：

var d= [
  '[(not set),20200409,103,0.0]',
  '[(not set),20200410,112,0.0]',
  '[(not set),20200411,56,0.0]',
  '[(not set),20200412,58,0.0]',
  '[(not set),20200413,108,0.0]',
  '[(not set),20200414,91,0.0]'];

// remove [] characters from a string  
const removeUnwantedCharacters = str => str.replace(/(\[|\])/, '');

const result = d.map(item => item.split(',').map(removeUnwantedCharacters));

console.log(result);

【讨论】：

感谢您的清晰解释，尽管问题很不清楚
感谢 Ervin 的回答，您建议的解决方案对我有用。