Beefy Boxes and Bandwidth Generously Provided by pair Networks
Syntactic Confectionery Delight

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.

Log In?

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

How do I use this? | Other CB clients
Other Users?
Others imbibing at the Monastery: (5)
As of 2016-06-25 16:23 GMT
Find Nodes?
    Voting Booth?
    My preferred method of making French fries (chips) is in a ...

    Results (326 votes). Check out past polls.