Combine array in JavaScript with underscore character

Question

 Var a = "837297,870895"
 Var b = "37297,36664"

OutPut = "837297_37297,870895_36664

I tried multiple script but does not working

Your question is not combining arrays. Your question is about replacing the comma with an underscore and then concatenating the strings with a comma between. — Heretic Monkey
– Heretic Monkey, Commented Feb 14, 2022 at 21:33
Does this answer your question? replace one string with another in javascript and Joining two strings with a comma and space between them — Heretic Monkey
– Heretic Monkey, Commented Feb 14, 2022 at 21:38

JaivBhup · Accepted Answer · 2022-02-14 21:13:43Z

0

You can split and map the splitted array as such:

var a = "837297,870895" 
var b = "37297,36664"

var output = a.split(',').map((e,i)=> e+"_"+b.split(',')[i])
console.log(output.toString())

For ES2015 or lower

var a = "837297,870895" 
var b = "37297,36664"

var output = a.split(',').map(function(e,i){return e+"_"+b.split(',')[i]})
console.log(output.toString())

edited Feb 14, 2022 at 21:13

answered Feb 14, 2022 at 21:01

JaivBhup

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4 Comments

Rahul Over a year ago

@jaivBhp Getting error - Error at line 6, character 31: This language feature is only supported for ECMASCRIPT_2015 mode or better: arrow function.

Andy Over a year ago

Rahul, it's 2022. Maybe time to update your development profile.

JaivBhup Over a year ago

Yes but you can also not use the arrow function. But i suggest to update you javascript to latest ecmascript

Heretic Monkey Over a year ago

Better yet, understand what the functions do, so that you can do them without the specific functionality available.

PeterKA · Accepted Answer · 2022-02-15 16:28:00Z

-1

You can start by converting the two strings (lists) into arrays using .map() and .split() methods. Then use .map() and .join() methods to produce the desired string (list):

const a = "837297,870895";
const b = "37297,36664";

const [c,d] = [a,b].map(e => e.split(','));

const output = c.map((e,i) => `${e}_${d[i]}`).join();

console.log( output );

edited Feb 15, 2022 at 16:28

answered Feb 14, 2022 at 21:26

PeterKA

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