I'm looking for a simple way to check if a string really represents
a number in ruby/rails. I figured there would be a String.is_numeric?
but haven't found anything.
I've seen suggestions for roll-your-own functions the best of which
appears to be something like (verbosely):
def represents_number?(s)
begin
if Float(s)
return true
else
return false
end
rescue
return false
end
end
This relies on the fact that Float() throws an exception if it
gets a string that it can't convert.
The issue I have with this is that it feels a little hinky in
that it's relying on Float throwing an exception. Maybe that's
okay, but it feels just a shade side-effecty.
The other option is to craft a regexp, which would be tough
if I *really* wanted to be thorough.
Am I missing any simpler options?
Thanks...
-glenn
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