Regex to Add a Character in a Space Pattern

Question

I have something like-

[[59],
[73 41],
[52 40 09],
[26 53 06 34],
[10 51 87 86 81],
[61 95 66 57 25 68]]

I need to add a comma before every space to be like -

[[59],
[73, 41],
[52, 40, 09],
[26, 53, 06, 34],
[10, 51, 87, 86, 81],
[61, 95, 66, 57, 25, 68]]

What would be regex string for that?

Answer 1

This depends on what regex flavor you are using but in general, looking for matches would be

(\d+)\s

and replacing would be

\1,

Answer 2

Judging from your data, you may just replace a space ' ' by a comma followed by a space ', '. You do not need a regex for that.

Answer 3

s/\( \)/,\1/g

And, as an afterthought:

s/ /, /g

Why bother with substitution replacement? :)

Answer 4

In Notepad++, open up the find control window with Ctrl+H.

• In Find What put a single space character
• In Replace With put a comma followed by a space character

This gives the expected output, but isn't very interesting as far as Regexes go.

Answer 5

Replace (\d)\s(\d) with \1, \2