Taking care of nested arrays during conversion

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I'm working on a problem involving nested arrays and string conversion. My array contains both strings and arrays, and I want to build a string representation that preserves the nested structure, similar to the example provided by scaler in this post.

This is my code:

JavaScript

let data = ["apple", ["banana", "cherry"], "date"];
let result = data.join(", ");
console.log(result);

What I have tried:

My intention was to receive apple, banana, cherry, and date, but instead, I got apple, banana,cherry, and date. The space around "banana" is gone, and it's unclear where the nested arrays start and stop. How can I modify the code to handle nested arrays correctly during conversion?

Any insights would be much appreciated. Thank you very much!

Posted 30-Aug-23 23:32pm

Syed Mubashshir Hasan

Updated 13-Sep-23 3:59am

Deeksha Shenoy

v3

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Andre Oosthuizen · Accepted Answer · 2023-08-30T23:49:00

The missing space is due to the way you are joining the data. It concatenates the array elements with the specified separator, but it doesn't add spaces automatically after the comma. You should use -

JavaScript

let data = ["apple", ["banana", "cherry"], "date"];
let result = data.map(item => Array.isArray(item) ? item.join(", ") : item).join(", ");
console.log(result);

The output will be -

Output

"apple, banana, cherry, date"

a Working fiddle - Correct Joining Method [^]