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Full Discussion: head & tail
Top Forums UNIX for Dummies Questions & Answers head & tail Post 57864 by svennie on Tuesday 9th of November 2004 06:40:33 AM
Old 11-09-2004
Question head & tail

I've a major file which includes other files and now I wanna 'cut' the file in several minor parts....like

....
find / -name "*.tmp" >filea
wc -l filea >fileb
sed -e '1s/ filea//' fileb >filec
AMOUNT=`cat filec`
if [ "$AMOUNT" = ??? ]; then
cat file a |head -100l (ell) |tail -100l >filec
cat file a |head -200l |tail -100l >filed
cat file a |head -300l |tail -100l >filee
....
fi

the number of the entries in filea are unknown. so getting them with wc, edit fileb, write the number in filec, make a variable AMOUNT.

now the problem is a loop. it should cut the first 100 (how making a loop like i+100?) , then the second 100, and so on and should stop if the filea is empty or when there is the EOF and the last part should have less then 100 entries.
also the files should be numbered or so....

thx for help...
 

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SVN::Simple::Edit(3)					User Contributed Perl Documentation				      SVN::Simple::Edit(3)

NAME
SVN::Simple::Edit - A simple interface for driving svn delta editors SYNOPSIS
my $edit = SVN::Simple::Edit->new (_editor => [SVN::Repos::get_commit_editor($repos, "file://$repospath", '/', 'root', 'FOO', &committed)], ); $edit->open_root($fs->youngest_rev); $edit->add_directory ('trunk'); $edit->add_file ('trunk/filea'); $edit->modify_file ("trunk/fileb", "content", $checksum); $edit->delete_entry ("trunk/filec"); $edit->close_edit (); ... $edit->copy_directory ('branches/a, trunk, 0); DESCRIPTION
SVN::Simple::Edit wraps the subversion delta editor with a perl friendly interface and then you could easily drive it for describing changes to a tree. A common usage is to wrap the commit editor, so you could make commits to a subversion repository easily. This also means you can not supply the $edit object as an delta_editor to other API, and that's why this module is named ::Edit instead of ::Editor. See SVN::Simple::Editor for simple interface implementing a delta editor. PARAMETERS
for constructor _editor The editor that will receive delta editor calls. missing_handler Called when parent directory are not opened yet, could be: &SVN::Simple::Edit::build_missing Always build parents if you don't open them explicitly. &SVN::Simple::Edit::open_missing Always open the parents if you don't create them explicitly. SVN::Simple::Edit::check_missing ([$root]) Check if the path exists on $root. Open it if so, otherwise create it. root The default root to use by SVN::Simple::Edit::check_missing. base_path The base path the edit object is created to send delta editor calls. noclose Do not close files or directories. This might make non-sorted operations on directories/files work. METHODS
Note: Don't expect all editors will work with operations not sorted in DFS order. open_root ($base_rev) add_directory ($path) open_directory ($path) copy_directory ($path, $from, $fromrev) add_file ($path) open_file ($path) copy_file ($path, $from, $fromrev) delete_entry ($path) change_dir_prop ($path, $propname, $propvalue) change_file_prop ($path, $propname, $propvalue) close_edit () AUTHORS
Chia-liang Kao <clkao@clkao.org> COPYRIGHT
Copyright 2003-2004 by Chia-liang Kao <clkao@clkao.org>. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See <http://www.perl.com/perl/misc/Artistic.html> perl v5.12.1 2005-02-23 SVN::Simple::Edit(3)
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