CODEWITHSUNDEEP
regexvimviregex-lookarounds
Meninx - メネンックス
Meninx - メネンックス

Reputation: 6441

Commafication of a number using vim regex

While reading the book "Mastering regular expression", I tried to solve the problem of "commafication" of a number using the vim editor.

How is it possible to turn a number in a file from:

1234567891234

to

1,234,567,891,234

(this is what is called by commafication of a number)

there is a solution using the lookaround but I tried to solve it without using that. Unfortunately I still not come up with the right command and that's why I am here. Here is my command till now:

:%s/\(\d\)\(\(\d\d\d\)\+\)/\1,\2/gc

which produces:

1,234567891234

The problem is with \+ which takes the longest chain. How can I repeat that for the rest of the chain?

Upvotes: 2

Views: 193

Answers (1)

anubhava
anubhava

Reputation: 786349

In vim you can use this regex to insert comma after every 3 digits:

:%s/\v(^)@!((\d{3})+$)@=/,/g

This is assuming each number is on a separate line.

If you have more than one number per line then use:

:%s/\v(<)@!((\d{3})+>)@=/,/g

Here is RegEx Demo

PS: Tested on VIM - Vi IMproved 7.2 and VIM - Vi IMproved 7.4

Upvotes: 3

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