Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl: the Markov chain saw
 
PerlMonks  

Re: Reg Ex exercise

by thundergnat (Deacon)
on Dec 05, 2012 at 16:26 UTC ( #1007321=note: print w/ replies, xml ) Need Help??


in reply to Reg Ex exercise

Seems like fairly arbitrary specs for what is or isn't a number. Ah well. Don't expect this to work for scientific notation, complex numbers, or anything else that isn't explicitly tested here.

printf "%s is %sa number.\n", $_, /^-?\d+(?:\.\d+)?$/ ? '' : 'NOT ' for qw/4 -7 0.656 -67.35555 5. 56F .32 -.04/;
4 is a number.
-7 is a number.
0.656 is a number.
-67.35555 is a number.
5. is NOT a number.
56F is NOT a number.
.32 is NOT a number.
-.04 is NOT a number.


Comment on Re: Reg Ex exercise
Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1007321]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others lurking in the Monastery: (19)
As of 2015-07-07 21:44 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (93 votes), past polls