将多个数组转换为字符串并用逗号连接它们

Posted 2023-05-09

【中文标题】将多个数组转换为字符串并用逗号连接它们

【英文标题】：convert multiple array into string and concat them with comma

【发布时间】：2021-09-14 16:13:36

【问题描述】：

我在一个数组中有一组数组，我想在数组内部进行转换，并用逗号和双引号分隔它，以便区分。

example:
var arr1 = [1,2,3,4,5,6,7,8,9,10];
var arr2 = [11,12,13,14,15,16,17,18,19,20];
var arr3 = [21,22,23,24,25,26,27,28,29,30];
var arr4 = [31,32,33,34,35,36,37,38,39,40];

this should converted and out should be

array["1,2,3,4,5,6,7,8,9,10","11,12,13,14,15,16,17,18,19,20","21,22,23,24,25,26,27,28,29,30","31,32,33,34,35,36,37,38,39,40"]

到目前为止我所做的是

var converArr1 = String(arr1);
var converArr2 = String(arr2);
var converArr3 = String(arr3);
var converArr4 = String(arr4);

var finalString = converArr1.concat(converArr2);
finalString = finalString.concat(converArr3);
finalString = finalString.concat(converArr4);

this is not concating it with double qoute

【问题讨论】：

您希望结果是 4 个字符串的数组，还是希望结果是字符串：array["1,2,3,4,5,6,7,8,9,10","11,12,13,14,15,16,17,18,19,20","21,22,23,24,25,26,27,28,29,30","31,32,33,34,35,36,37,38,39,40"]？

我希望结果是 4 个字符串的数组

查看我的答案的编辑。

这个要求似乎很奇怪。出于什么原因，您可能希望将子数组转换为字符串？这让他们更难合作。因此，这似乎是一个 XY 问题。

【参考方案1】：

从数组映射到数组的字符串表示形式（用引号括起来），然后用逗号 (,) 连接这些字符串表示形式，然后使用模板文字将 array[] 括起来。

var arr1 = [1,2,3,4,5,6,7,8,9,10];
var arr2 = [11,12,13,14,15,16,17,18,19,20];
var arr3 = [21,22,23,24,25,26,27,28,29,30];
var arr4 = [31,32,33,34,35,36,37,38,39,40];

let result = "";

result = `array[$[arr1, arr2, arr3, arr4].map(arr => `"$String(arr)"`).join(",")]`;

console.log(result);

如果您希望结果是 4 个字符串的数组：

    var arr1 = [1,2,3,4,5,6,7,8,9,10];
    var arr2 = [11,12,13,14,15,16,17,18,19,20];
    var arr3 = [21,22,23,24,25,26,27,28,29,30];
    var arr4 = [31,32,33,34,35,36,37,38,39,40];

    let result = "";

    result = [arr1, arr2, arr3, arr4].map(arr => String(arr));

    console.log(result);