To change the last two letters : sub with regular expressions « String « Ruby

To change the last two letters

x = "This is a test"
puts x.sub(/..$/, 'Hello')


Related examples in the same category

1.Basic Special Characters and Symbols Within Regular Expressions
2.Regular Expression Character and Sub-Expression Modifiers
3.To replace the first two characters of a string with 'Hello':
4.scan is the iterator method you require:
5.scan(/../): . means Any character
6.scan (/\w\w/): \w means Any letter, digit, or underscore
7.Index string by regular expression