Change strings in Javascript with replace() based on index

Question

I have the following string

let string = "01,15,01,45"

Which i want to turn to this

string = "01:15 - 01:45"

but i'm only able to come up with

"01,15,01,45".replace(/,/g, ':') // Gives "01:15:01:45"

but then i'm not sure how to get the index of the 5th position in string and replace it to ' - '

Any suggestion will be helpful.

if the length is known, you can just do "01,15,01,45".replace(/(\d\d),(\d\d),(\d\d),(\d\d)/, "$1:$2 - $3:$4") — ASDFGerte
– ASDFGerte, Commented Jul 26, 2020 at 12:54

Niet the Dark Absol · Accepted Answer · 2020-07-26 12:53:44Z

3

Don't try doing things in one step when it would be clearer as multiple steps.

let string = "01,15,01,45";
let parts = string.split(",");
let result = `${parts[0]}:${parts[1]} - ${parts[2]}:${parts[3]}`;

answered Jul 26, 2020 at 12:53

Niet the Dark Absol

326k86 gold badges480 silver badges604 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

fedesc Over a year ago

When you get so fixated on solving your problamatic approach and you forget other simpler solutions. Thank you so much.

Ubaid Shaikh · Accepted Answer · 2020-07-26 13:06:16Z

1

let string = "01,15,01,45";

stringArray=string.split(',');

firstInterval=stringArray.slice(0, stringArray.length/2);

Output: ["01", "15"]

secondInterval=stringArray.slice(stringArray.length/2,stringArray.length);

Output:["01", "45"]

firstIntervalString=firstInterval[0]+":"+firstInterval[1];

Output: "01:15"

secondIntervalString=secondInterval[0]+":"+secondInterval[1];

Output: "01:45"

completeInterval=firstIntervalString+" - "+secondIntervalString;

Output: "01:15 - 01:45"

I think the code is self-explanatory. Still, please feel free to let me know if any part is not clear.

answered Jul 26, 2020 at 13:06

Ubaid Shaikh

4533 silver badges7 bronze badges

Comments

Nina Scholz · Accepted Answer · 2020-07-26 16:13:15Z

1

Another approach with matching pairs and replacing leftover commas.

let string = "01,15,01,45",
    result = string.match(/\d\d,\d\d/g).map(p => p.replace(/\,/, ':')).join(' - ');

console.log(result);

answered Jul 26, 2020 at 16:13

Nina Scholz

388k26 gold badges367 silver badges417 bronze badges

1 Comment

fedesc Over a year ago

Thanks @Nina Scholz

Collectives™ on Stack Overflow

Change strings in Javascript with replace() based on index

3 Answers 3

1 Comment

Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

1 Comment

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related