Notepad++ - regex : replace first occurrence of a characters group in each line

Question

Someone would know the regex expression can be used (in notepad++) in order to replace the first occurence of a characters group in each line?

eg:

abcdefg//ijkl//m.
qsdflkj//sdqlmkf//jqsmdl.

to

abcdefg\\ijkl//m.
qsdflkj\\sdqlmkf//jqsmdl.

so replace // by \\ in each line, but only the first occurence of , not the next.

If regex can't achieve it, is there another method with notepad. If not, I will code a program to split line and do the job, but need more time.

Thnaks in advance.

^(.*?)(\/\/)(.*) with gm modifiers and substitution of $1\\$3 — ctwheels
– ctwheels, Commented Sep 18, 2017 at 20:28

Youssef13 · Accepted Answer · 2017-09-18 20:31:46Z

11

Enter this regex in Find what field

(.*?)//(.*)

Enter this in Replace with field

$1\\$2

Select Regular expression in Search Mode and Uncheck . matches newline

answered Sep 18, 2017 at 20:31

Youssef13

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3 Comments

ctwheels Over a year ago

Isn't this just a copy/rewording of my comment?

Youssef13 Over a year ago

Sorry, I didn't see it before I post this. Should I delete this answer ?

Orion Over a year ago

Great !! works perfectly. Big thanks to Youssef13 and so @ctwheels if he is the original author....

Toto · Accepted Answer · 2017-09-19 10:45:10Z

2

Ctrl+H
Find what: ^[^/]+\K//
Replace with: \\\\
check Wrap around
check Regular expression
Replace all

Explanation:

^               : begining of line
  [^/]+         : 1 or more any character that is not a slash
  \K            : forget all we have seen until this position
  //            : 2 slashes

Replacement:

\\\\     : 2 backslashes, each one must be escaped

Result for given example:

abcdefg\\ijkl//m.
qsdflkj\\sdqlmkf//jqsmdl.

answered Sep 19, 2017 at 10:45

Toto

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