Ruby regex - gsub only captured group

Question

I\'m not quite sure I understand how non-capturing groups work. I am looking for a regex to produce this result: 5.214. I thought the regex below would work, bu

Answer 1

You don't need regexp to achieve what you need:

'1,200.00'.tr('.','!').tr(',','.').tr('!', ',')

• Periods become bangs (1,200!00)
• Commas become periods (1.200!00)
• Bangs become commas (1.200,00)