Beefy Boxes and Bandwidth Generously Provided by pair Networks
No such thing as a small change
 
PerlMonks  

Re^2: Converting a list of numbers to use a range operator

by Anonymous Monk
on Mar 24, 2013 at 13:22 UTC ( #1025141=note: print w/ replies, xml ) Need Help??


in reply to Re: Converting a list of numbers to use a range operator
in thread [Solved] Converting a list of numbers to use a range operator

OK, very short code, but why does this push @a,"inf" work? Where is this "inf" documented?


Comment on Re^2: Converting a list of numbers to use a range operator
Download Code
Re^3: Converting a list of numbers to use a range operator
by LanX (Canon) on Mar 24, 2013 at 14:18 UTC
    > but why does this push @a,"inf" work?

    inf and -inf are special numeric constants

    DB<159> $a=inf => "inf" DB<160> --$a => "inf" DB<161> ++$a => "inf"

    in this case they are handy, because $now+1 == inf won't raise a warning

    DB<116> use warnings;5=="inf" => "" DB<117> use warnings;5=="WhatEver" Argument "WhatEver" isn't numeric in numeric eq (==) at (eval 47)[mult +i_perl5db.pl:644] line 2.

    > Where is this "inf" documented?

    no idea, I scanned the perldocs for X<inf> w/o success.

    see also Infinity and Inf?

    Cheers Rolf

    ( addicted to the Perl Programming Language)

    UPDATE: deleted wrong example about incrementing inf

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1025141]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others surveying the Monastery: (8)
As of 2014-12-23 00:26 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    Is guessing a good strategy for surviving in the IT business?





    Results (133 votes), past polls