Regular Expressions Cheatsheet

\          escape prefix character
.         "wildcard" – matches any character
+        quantifier: "one or more"
*         quantifier: "zero or more"
^         beginning-of-line (except when used within a range)
$        end-of-line
?        quantifier: "zero or one" (more about this in the next section)
|         logical OR, among subpatterns within a group
[,]       start-of-range and end-of-range
(,)      start-of-group and end-of-group
{,}      start, end of min/max quantifier


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