character_classes

🔢 Use Character Classes and Shorthand

Character classes let you match sets of characters concisely. You can combine shorthand classes like \d (digits) and custom ranges like [A-Fa-f] to fine-tune your patterns.

pattern = /[A-Za-z]\w{2,10}\d*/   # starts with a letter, 2–10 word chars, optional digits
'Hello123'.match?(pattern)          # => true
'1Hello'.match?(pattern)           # => false

Use \s, \S, \w, \W, \d, and \D to cover common classes without lengthy lists.