re = /^\$?([0-9]{1,3},([0-9]{3},)*[0-9]{3}|[0-9]+)(\.[0-9][0-9])?$/m
str = '$500
$5,00
$5,000
$5.0
$5.
$5.00
$5.000
$5,.5
500
5,000
5,00
5,0
5.0
5.00
5.000
5.23
2.342
$5,5,5
$5,000
$5,000,0
$5,000,00
$5,000,000
$5,0000'
# Print the match result
str.scan(re) do |match|
puts match.to_s
end
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Ruby, please visit: http://ruby-doc.org/core-2.2.0/Regexp.html