How to join array of strings in Javascript

Question

I want to join an array of result = ["July"," ","1st"] into result = ["July 1st"]. I also want to have the comma removed.

I have tried result.join() and result.join(",") but it didn't work. In fact, nothing changes. Can anyone help me to solve this problem? Thanks.

Are you referencing the output? Those calls will not change the result variable. var joined = result.join(""); — user1106925
– user1106925, Commented Jun 22, 2016 at 3:10
Are you sure you want a single element result array? What good does this result do? — ggorlen
– ggorlen, Commented Mar 22, 2022 at 14:00

Azamantes · Accepted Answer · 2016-06-22 03:19:17Z

3

You just need to join it and put into an array...:

result = [result.join('')];

edited Jun 22, 2016 at 3:19

answered Jun 22, 2016 at 3:14

Azamantes

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3 Comments

Owennn Over a year ago

it works when I create a new variable and assign the result to it. I wonder why it didnt work this way result = result.join('');

Azamantes Over a year ago

Then just assign it to the result. I updated my answer.

Owennn Over a year ago

I see, so we have to put the result.join('') inside a [ ] to make it work. Thanks

Jagdish Idhate · Accepted Answer · 2016-06-22 03:11:51Z

1

You need to specify empty string in .join function

var result = ["July"," ","1st"]
result.join('') // "July 1st"

EDIT: and if you need output in array then it will

[result.join('')] // ["July 1st"]

answered Jun 22, 2016 at 3:11

Jagdish Idhate

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Comments

Rohit Shedage · Accepted Answer · 2016-06-22 03:12:29Z

0

var b ="";

result.forEach(function(a){b = b.concat(a);});

console.log(b);

answered Jun 22, 2016 at 3:12

Rohit Shedage

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Comments

Community · Accepted Answer · 2017-05-23 12:16:16Z

0

You can also use the javascript reduce() function as follows:

var result = [result.reduce(function(previousString, currentString) {
                return previousString + currentString 
             })];

For a more detailed explanation of how it works, check out this video by Mattias Petter Johansson

edited May 23, 2017 at 12:16

CommunityBot

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answered Jun 22, 2016 at 3:27

Kevin Lee

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