Re: How I can check number?


#1

In einer eMail vom 01.06.2006 12:21:49 Westeuropäische Normalzeit
schreibt
removed_email_address@domain.invalid:

How I can simplify it:
params[:value] =~ /^\d+$|^-\d+$|^\d+.\d+$|^-\d+.\d+$/

OK, so, you want to extract the numbers that can by either floats or
integers from some
text.
You can use a * after something you don’t necessarily need in your
Regexp,
and you can
use that on groups of characters, enclosed in brackets:

text=‘my bank account is -100000000.09 dollars, but I earn 1 dollar a
day,
which is better than earning 0.50 dollars or 0 dollars.’
words=text.split
numbers=[]
words.each{|x|
if x=~ /^-\d+(.\d+)$/
numbers<<x
end
}
p ‘all the numbers that were there:’
p numbers

Best regards,

Axel