Regular expressions (or “regexes”) are sequences of characters used to find matches in text. For example, [a-z]+ matches any text made of lowercase characters a to z, or [0-9]+\.[0-9]+ matches any decimal number like 42.1.
Regular expressions (or “regexes”) are sequences of characters used to find matches in text. For example, [a-z]+ matches any text made of lowercase characters a to z, or [0-9]+\.[0-9]+ matches any decimal number like 42.1.