Hello fellow seekers of perl wisdom,

To me the following awk code is a piece of art. I got it from
http://www.unix.com/shell-programming-scripting/130349-fgrep-grep-awk-help-scanning-delimiters.html
I wonder if it is possible to make an equally easy to understand and fast perl oneliner:

 awk 'NR==FNR {a[$1];next} $1 in a {print RS$0}' file1 RS=">" file2 > output 
cat file1 
name1
name2
name3

cat file2
>name3
text text
text text
>name1
some kind 
of text

cat output
>name1
text text
text text
>name3
some kind
of text

[download]

The task is to extract the names that are present in file1 from file2 plus all the text that follows it until the next ">" character. Speed is of importance as files may well be several hundred MB big. I would be eager to hear any comments on this.

cheers space_agent

In reply to awk 2 perl oneliner by space_agent

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