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Variable declarations
Hi, A quite basic question I'm afraid. Somehow I had got it into my head that in C all variables must be declared at the start of a function block. Certainly this is convention and I would go so far as to say good practice. But from a quick test using a couple of different compilers it... -
Checking if a file exists
To expand slightly the file operators are generally unary boolean operators. i.e. they take a single argument (a scalar which evaluates to a filename or filehandle) and return true or false. -
Checking if a file exists
They are not command line switches! "perl -e" does something quite different. The code in my first post could be used as it is to form part of a perl program. -
Checking if a file exists
Yes, there are a number of file test operators - -w for a writeable file, -r for readable and so on. No doubt there's a complete list somewhere in the perl documentation. -
Checking if a file exists
Try something like: my $filename = "/usr/bin/perl"; -e $filename or warn "Perl is not installed correctly"; -
piping
izivt I am not a perl programmer in any way shape or form, but just a suggestion which may help. When used in the way you have the at command submits the at-job and writes scheduled time and at-job-id to standard error, not STDOUT. In order to capture standard error as well as STDOUT use |&...
