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• #REGEX FOR NUMBER WITH DECIMAL HOW TO#

Matches the preceding element zero or more times instead of zero or once.

It is great for finding optional characters.Ĭolou?r will match both color and colour. Matches the preceding element zero or one time (it will always match if the character was not found). Used to match characters at the end of a stringĬom$ will match or telecom but not computer. Used to match characters at the beginning of a string Or you can look for a range of characters by giving two characters and separating them by a hyphen for example, net will match neta, netw and netf but not net1. You can list characters individually for instance, net will match netw, netr and netx but not netz. For example, will match any of the characters n, e, t or $ ( $ is a metacharacter, but inside a character class it matches only $). Note that metacharacters (with one exception) are not active inside classes. For example will match any character except n this is called a negated character class. Inside a class, at the beginning, the ^ means exception from the search. Matches for anything inside the square brackets. Net.rix will match both and Character class The following table describes how each of these metacharacters functions. The following single characters are not interpreted as literals but instead have special meanings: Note that regular expressions are case sensitive, so www will not match WWW or wWw. LiteralsĪny single character, except for those reserved as metacharacters, is already a regular expression itself. Regex ComponentsĪ RegEx can include literals and metacharacters. For example, you can define a RegEx that will match email addresses, PII, PHI or credit card numbers. Using this little language, you specify rules that define the strings you want to match. Regular expressions are a small but highly specialized programming language they are basically wildcards on steroids. Data Classification for Compliance: Looking at the Nuances.

#REGEX FOR NUMBER WITH DECIMAL HOW TO#

Data Classification: What It Is, Why You Should Care and How to Perform It