如何在 javascript 中将整个数组转换为字符串

Question

I got a question in the interview that he asked to convert the whole array into a String. I tried with toString() but that's not worked for his output.

input

let a=['20','30','50']

expected output

"['20','30','50']"

Answer 1

Assuming the "output" is the content of this string you want, you can map the values first to wrap them in single-quotes, then join the array with commas and wrap the entire thing in "[...]" .

 const a = ['20','30','50']; const str = `"[${a.map(v=>`'${v}'`).join(",")}]"`; console.log(str);

Answer 2

Try this:

let arr = ['1','2','3'];

//this will convert it to string
let arrToString = JSON.stringify(arr);

//you can confirm its type using below code
console.log(typeof(arrToString))