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Re: Parsing file and joining content into string

by LanX (Abbot)
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! =)

HTH!

Cheers Rolf


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