Beefy Boxes and Bandwidth Generously Provided by pair Networks
The stupid question is the question not asked
 
PerlMonks  

Re: Unexpected difference in whitespace parsing in subroutine calls.

by pg (Canon)
on Jul 10, 2005 at 16:19 UTC ( [id://473763]=note: print w/replies, xml ) Need Help??


in reply to Unexpected difference in whitespace parsing in subroutine calls.

The usual suggestion, "use strict; use warnings;". if you d that, you will get warnings, which might lead you to think of something else in this case.

As for the problem, your f() had two different uses in different cases:

  1. Being used before sort is called. In this case, it returns 1, and that 1 is then sorted.
  2. Being used as call back of sort to determine the order. In your examples, this is not significant, as your list only have one member.

Look at this very simple example, it shows how the call back is used.

use strict; use warnings; print sort f (1,2,3); sub f {1}

Another one (guess output first):

use strict; use warnings; print sort f (1,2,3,4,5,6); sub f {($b % 2) <=> ($a % 2)}

Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Node Status?
node history
Node Type: note [id://473763]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this?Last hourOther CB clients
Other Users?
Others pondering the Monastery: (7)
As of 2024-03-28 18:42 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found