Regex Cheatsheet
Anchors
^: start of the string or the start of a line in a multiline pattern$: end of the string or the end of a line in a multiline pattern\b: word boundary\B: not word boundary (opposite of\b)
Character sequences
.: any character except line breaks\w: any word character\W: any non-word character (opposite of\w)\s: any whitespace character\S: any non-whitespace character (opposite of\s)\d: any digit character\D: any non-digit character (opposite of\d)[abc]: a single character in the given set (here a, b or c)[^abc]: a single character not in the given set (opposite of[abc])[a-z]: a single character in the given range (here between a and z inclusive)[^a-z]: a single character not in the given range (opposite of[a-z])[a-zA-Z]: a single character in either of the given ranges
INFO
Use \ to escape special characters (e.g. \, /, [, ], (, ), {, } etc.).
Quantifiers
a?: zero or one of a (equal toa{0,1})a*: zero or more of a (equal toa{0,})a+: one or more of a (equal toa{1,})a{3}: exactly 3 of aa{3,}: 3 or more of aa{3,5}: between 3 and 5 of a (inclusive)
Groups
(ab): match and capture everything enclosed (here exactlyab)(a|b): match and capture either one character (hereaorb)(?:ab): match everything enclosed, without capturing
Flags
g: Globalm: Multilinei: Case insensitiveu: Unicode