Beefy Boxes and Bandwidth Generously Provided by pair Networks
Don't ask to ask, just ask
 
PerlMonks  

Re^3: convert rows to columns

by Athanasius (Chancellor)
on Nov 27, 2012 at 01:43 UTC ( #1005778=note: print w/replies, xml ) Need Help??


in reply to Re^2: convert rows to columns
in thread convert rows to columns

No, I did mean =, for assignment.

On each iteration of the while loop, the default variable $_ is implicitly assigned the next line read from the DATA handle. This $_ variable becomes the implicit argument to chomp, and then it’s implicitly bound to the regex match.

So, the code I gave is equivalent to this:

while ($_ = <DATA>) { chomp $_; my @pairs = $_ =~ /(..)/g; ...

but more compact and “Perlish”. See perlvar#General-Variables.

Hope that helps,

Athanasius <°(((><contra mundum

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1005778]
help
Chatterbox?
and all is quiet...

How do I use this? | Other CB clients
Other Users?
Others examining the Monastery: (11)
As of 2017-10-20 13:13 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    My fridge is mostly full of:

















    Results (263 votes). Check out past polls.

    Notices?