Difference between revisions of "Regular Expressions"
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== Random == | == Random == | ||
* '''Filename''' | * '''Filename''' | ||
== Useful RegEx == | |||
== Useful/Standard RegEx == | |||
{|cellpadding="2" cellspacing="0" border="1" | {|cellpadding="2" cellspacing="0" border="1" | ||
|- style="background-color:#bbddff;" | |- style="background-color:#bbddff;" | ||
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| <code><nowiki> \b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}\b </nowiki></code> | | <code><nowiki> \b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}\b </nowiki></code> | ||
|} | |} | ||
== Examples == | |||
=== Logfile Name === | |||
''' <code> \d{4}-[A-Za-z]{3}-Week\d{1}.log </code> ''' | |||
Example matches... | |||
* <code> 2010-Feb-Week4.log </code> | |||
* <code> 2009-Dec-Week2.log </code> | |||
* <code> 1234-aBc-Week0.log </code> | |||
=== Between Parentheses === | |||
''' <code> (?<=\[)(.*?)(?=\]) </code> ''' | |||
Matches everything between <code> [ </code> and <code> ] </code>, so for example... | |||
* <code> VMFS_SCSI_DS_01 </code> is matched from <code> [VMFS_SCSI_DS_01] My_VM/MyVM.vmdk | |||
Its essentially done via three chunks of the regex... | |||
# <code> (?<=\[) </code> | |||
#* Requires that <code> [ </code> immediately proceeds the match | |||
# <code> (.*?) </code> | |||
#* Matches everything | |||
# <code> (?=\]) </code> | |||
#* Requires that <code> [ </code> immediately follows the match | |||
Revision as of 15:24, 3 November 2010
Random
- Filename
Useful/Standard RegEx
| Matches | Expression |
|---|---|
| IP Address | ^\b((25[0-5]|2[0-4]\d|[01]\d\d|\d?\d)\.){3}(25[0-5]|2[0-4]\d|[01]\d\d|\d?\d)\b
|
| Hostname (no domain) | \A(\w|-)+
|
| Email address | \b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}\b
|
Examples
Logfile Name
\d{4}-[A-Za-z]{3}-Week\d{1}.log
Example matches...
2010-Feb-Week4.log2009-Dec-Week2.log1234-aBc-Week0.log
Between Parentheses
(?<=\[)(.*?)(?=\])
Matches everything between [ and ] , so for example...
VMFS_SCSI_DS_01is matched from[VMFS_SCSI_DS_01] My_VM/MyVM.vmdk
Its essentially done via three chunks of the regex...
(?<=\[)
- Requires that
[ immediately proceeds the match
(.*?)
- Matches everything
(?=\])
- Requires that
[ immediately follows the match