filtering email addresses

[Luca Scaljery]

Hi All

I'm trying to filter email adresses like this

#! /usr/bin/ruby

email = "test_test.test"

if email.scan(/\@/)
p "yes"
end

For some reason my program always prints 'yes'

How would should I do this ?

thnx
LuCa

 

[Dejan Dimic]

Hi All

I'm trying to filter email adresses like this

#! /usr/bin/ruby

email = "test_test.test"

if email.scan(/\@/)
  p "yes"
end

For some reason my program always prints 'yes'

How would should I do this ?

thnx
LuCa

 

[Luca Scaljery]

thnx, makes sense

How do you, BTW, exlude matches ?

!str.scan(pattern) do
...
end

doesn't work. Also a regex like
/[^pattern]/

doesn't work

 

[David A. Black]

Hi --

thnx, makes sense

How do you, BTW, exlude matches ?

!str.scan(pattern) do
...
end

doesn't work. Also a regex like
/[^pattern]/

doesn't work

str =~ /@/

It's absolutely not a robust way to check for an email address, but it
will check for an at-sign

As for /[^pattern]/, that will match one character that is not a, e,
n, p, t, or r. For non-matching, try:

str !~ /pattern/

or maybe negative assertions in the regex.


David

 

[Luca Scaljery]

Hi --



str =~ /@/

thnx, I was looking for a String#method but this is OK too

As for /[^pattern]/, that will match one character that is not a, e,
n, p, t, or r. For non-matching, try:

my mistake

thnx a lot
LuCa

 

[David A. Black]

Hi --

thnx, I was looking for a String#method but this is OK too

=~ is a String method.


--------------------------------------------------------------
String#=~
str =~ obj => fixnum or nil
------------------------------------------------------------------------
Match---If _obj_ is a +Regexp+, use it as a pattern to match
against _str_,and returns the position the match starts, or +nil+
if there is no match. Otherwise, invokes _obj.=~_, passing _str_
as an argument. The default +=~+ in +Object+ returns +false+.

"cat o' 9 tails" =~ /\d/ #=> 7
"cat o' 9 tails" =~ 9 #=> false


David

 

[Luca Scaljery]

you're right (I still have to get used to that!)