Beefy Boxes and Bandwidth Generously Provided by pair Networks
good chemistry is complicated,
and a little bit messy -LW

Re: Parsing file and joining content into string

by LanX (Chancellor)
on Jan 15, 2013 at 18:33 UTC ( #1013439=note: print w/replies, xml ) Need Help??

in reply to Parsing file and joining content into string

> I am not asking for anyone to write any code here but I am looking for good advice

great! =)

> I need to start at the # of each entry and finish at the END

2 possible approaches

1. you change the INPUT_RECORD_SEPARATOR to 2 linebreaks $/="\n\n"

Iterating now with  while ( $chunk = <$INPUT>) will give you multiple lines to process in chuncks.

2. you use the flip-flop operator '..' to read all lines between from start till end pattern

if ( $line =~ /^# \d+ \d+\.\d+$/ .. $line =~ /^END$/ ) { $chunk.=$line; } else { process($chunk) if $chunk; $chunk='': }

You're free to directly process($line) and to skip the '$chunk'-part completely.

> join the contents of the data into one complete string keeping the ";" separators.

well $chunk is a complete string now, do a regex that substitutes ";\n" with ";"

If you process line-by-line try chomp $line to kill all '\n'

> I need to do this for each occurrence of data which falls between # and END.

You need to get rid of start and end line?

Then substitute them away with patterns given. see s///

Or extend the flip-flop expression and add  and not //

'//' defaults to matching the last successful pattern, in your case first and last line. not excludes them

So I'm curious to see your code and I hope others won't take the fun away! =)


Cheers Rolf

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1013439]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others chilling in the Monastery: (3)
As of 2016-10-24 04:52 GMT
Find Nodes?
    Voting Booth?
    How many different varieties (color, size, etc) of socks do you have in your sock drawer?

    Results (303 votes). Check out past polls.