Beefy Boxes and Bandwidth Generously Provided by pair Networks
go ahead... be a heretic

Re: Interesting line which I read from Monk's snippets

by davidrw (Prior)
on Jan 31, 2006 at 04:39 UTC ( #526658=note: print w/replies, xml ) Need Help??

in reply to Interesting line which I read from Monk's snippets

First, start with substr($0, 0, 1) ... perlvar tells us that $0 is the name of the program running .. perlfunc tells us about substr, and so this clause is getting the first letter of the program being run.

Now, let's look at {qw(a - b = c ~ d ^)} .. This is creating a hashref, with a, b, c, d as the keys and the characters: - = ~ ^ as the values.. to see this, do:
perl -MData::Dumper -e 'print Dumper {qw(a - b = c ~ d ^)}' # OUTPUT: $VAR1 = { 'a' => '-', 'b' => '=', 'c' => '~', 'd' => '^' };

And putting those together, you end up w/$pat being one of those four values characters if the first letter of $0 is a, b, c, or d. Otherwise it will be undef.

why is this being done? I dunno -- would have to see the context.

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://526658]
and all is quiet...

How do I use this? | Other CB clients
Other Users?
Others drinking their drinks and smoking their pipes about the Monastery: (4)
As of 2018-03-25 00:42 GMT
Find Nodes?
    Voting Booth?
    When I think of a mole I think of:

    Results (299 votes). Check out past polls.