[SOLVED] a simple regex problem

validator456 · 04-27-2014, 02:51 AM

This should be easy but I cannot wrap my brains around it.
I tried to use regex on this:
33 eidkei eikeiek eiekek
34 eiekek eiekek ekeek
35 eiekek ekekek ekekke

I want to turn it into:
3.3 eidkei eikeiek eiekek
3.4 eiekek eiekek ekeek
3.5 eiekek ekekek ekekke

\d\d makes a match but how do I put a dot in between the numbers?

pan64 · 04-27-2014, 02:55 AM

what kind of regexp did you try? dot is usually \. or [.] just see documentation about that.

allend · 04-27-2014, 02:56 AM

Code:

bash-4.3$ echo "33 eidkei eikeiek eiekek " | sed 's/\(^.\)/\1\./' 
3.3 eidkei eikeiek eiekek

validator456 · 04-27-2014, 03:45 AM

I have been using the text-editor Geany. I have been trying all along and I have found a workaround. Not slick. But it works.

First. Replace the first 3's with dots:
Search for:3
Replace with:.

You get:
.3 eidkei eikeiek eiekek
.4 eiekek eiekek ekeek
.5 eiekek ekekek ekekke

Then another regex.
Search for:[/.]
Replace with:3.

Thank you for your replies.

grail · 04-27-2014, 03:54 AM

Here are some alternatives:

Code:

echo "33 eidkei eikeiek eiekek " | sed 's/^./&./'

echo "33 eidkei eikeiek eiekek " | awk -F "" '$1=$1"."' OFS=""

echo "33 eidkei eikeiek eiekek " | ruby -ne 'puts $_.sub(/^./,"\\&.")'

allend · 04-27-2014, 04:00 AM

I love losing to grail because I always learn something.