Shell Programming and Scripting

Hi, i have updated in my previous post, Please check it.

Thanks very much Scrutinizer and rangarasan.
These 2 solutions works the way I need it.
How you make these codes I don't understand it, maybe I'm to old for to learn this but I'm trying.

---------- Post updated 03-16-12 at 12:39 AM ---------- Previous update was 03-15-12 at 12:57 AM ----------

I try to change [:alnum:] with [:a-z:] because the script may not joing lines ended with numbers but this doens't work.
Than I change with [ a-zA-Z ] but here the script do nothing.

152
456
I don't want to joing
lines ended with numbers.
-----------------------------
I want to convert this to
----------------------------
152
456
I don't want to joing lines ended with numbers.

I have to learn awk because I can't always ask questions here on this forum.
But thanks anyway.

Hi,

Try this one, There is little modification in my previous post.

Code:

awk -v inpf=35 -v inps=30 '{a[NR]=$0;}END{for(i=1;i<=NR;i++){f=length(a[i]);s=length(a[i+1]);if(f<inpf && s<inps && s!=0 && f!=0 && a[i] !~ /[0-9]$/){ORS="";}else{ORS="\n";}print a[i];}}' file

If current line not ends with Numeric and current line length is less than 35 and also next line lenth is less than 30 then, we are joining the two lines. Hope i covered all your requirement.

Cheers,
Ranga

Code:

awk '1;length<=m && /[[:alpha:][:space:],]$/ && getline p{print (length(p)<=n?FS:RS) p}{print RS}' m=20 n=15 ORS= infile

In this case that should have been a-zA-Z or [:alpha:]. The latter is preferable since it also works for other letters beside the standard letters...

---------- Post updated at 09:01 ---------- Previous update was at 08:29 ----------

Hi thailand, here is a clarifcation: