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10.1.2 Regex (Regulare Expressions (Regex) (Commands (\d (any digit), \D…
10.1.2 Regex
Regulare Expressions (Regex)
A language used to extract text from data
Commands
\d
any digit
\D
any non-digit
\w
any alphanumeric character
\W
any non-alphanumeric character
.
Finds any character
?
makes a character optional (must be behind character)
\s
any white space
\S
any non-white space
[...]
looks for only things inside the brackets
[^...]
looks for things not in brackets
ab|cd
finds string on the right or the left
^
specifies the it must be in the beginning
$
Specifies string must be at the end
*
when after character, it may have none or more
+
must have at least one or more of the character this follows
{...}
shows the number or repeats
{2,4}
repeats between 2 and 4 times
()
captures a string the fits the pattern