01-19-2007
Delete Portion of a file
hi i would like to know whether i can delete a part of a file in C
for eg. if my file contained
1234567890
and i want to delete
456
so that it becomes
1237890
is there a way i can do this.
well, one way i can achieve this is by creating a new file, copy whatever i want, then delete the old file and rename the new file with the name of the old file.
but i was wondering whether it can be done in directly, i.e. without doing any copies.
plz help
regards
Edit/Delete Message
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LEARN ABOUT DEBIAN
path::dispatcher::rule::under
Path::Dispatcher::Rule::Under(3pm) User Contributed Perl Documentation Path::Dispatcher::Rule::Under(3pm)
NAME
Path::Dispatcher::Rule::Under - rules under a predicate
SYNOPSIS
my $ticket = Path::Dispatcher::Rule::Tokens->new(
tokens => [ 'ticket' ],
prefix => 1,
);
my $create = Path::Dispatcher::Rule::Tokens->new(
tokens => [ 'create' ],
block => sub { create_ticket() },
);
my $delete = Path::Dispatcher::Rule::Tokens->new(
tokens => [ 'delete', qr/^d+$/ ],
block => sub { delete_ticket(shift->pos(2)) },
);
my $rule = Path::Dispatcher::Rule::Under->new(
predicate => $ticket,
rules => [ $create, $delete ],
);
$rule->match("ticket create");
$rule->match("ticket delete 3");
DESCRIPTION
Rules of this class have two-phase matching: if the predicate is matched, then the contained rules are matched. The benefit of this is less
repetition of the predicate, both in terms of code and in matching it.
ATTRIBUTES
predicate
A rule (which must match prefixes) whose match determines whether the contained rules are considered. The leftover path of the predicate is
used as the path for the contained rules.
rules
A list of rules that will be try to be matched only if the predicate is matched.
perl v5.12.4 2011-08-30 Path::Dispatcher::Rule::Under(3pm)