Regular Expressions 101

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`
\[((?P<serial>\d{14}){0,1}[\.\w]*-(?P<pccode>[\dA-Z]{8}))\] +
`
g
\[ matches the character [ with index 9110 (5B16 or 1338) literally (case sensitive)
1st Capturing Group
((?P<serial>\d{14}){0,1}[\.\w]*-(?P<pccode>[\dA-Z]{8}))
Named Capture Group serial
(?P<serial>\d{14}){0,1}
{0,1} matches the previous token between zero and one times, as many times as possible, giving back as needed (greedy)
A repeated capturing group will only capture the last iteration. Put a capturing group around the repeated group to capture all iterations or use a non-capturing group instead if you're not interested in the data
\d
matches a digit (equivalent to [0-9])
{14} matches the previous token exactly 14 times
Match a single character present in the list below
[\.\w]
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
\. matches the character . with index 4610 (2E16 or 568) literally (case sensitive)
\w matches any word character (equivalent to [a-zA-Z0-9_])
- matches the character - with index 4510 (2D16 or 558) literally (case sensitive)
Named Capture Group pccode
(?P<pccode>[\dA-Z]{8})
Match a single character present in the list below
[\dA-Z]
{8} matches the previous token exactly 8 times
\d matches a digit (equivalent to [0-9])
A-Z matches a single character in the range between A (index 65) and Z (index 90) (case sensitive)
\] matches the character ] with index 9310 (5D16 or 1358) literally (case sensitive)
matches the character with index 3210 (2016 or 408) literally (case sensitive)
Global pattern flags
g modifier: global. All matches (don't return after first match)
Your regular expression does not match the subject string.

Regular Expression
No Match

`
`
g

Test String

Code Generator

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Generated Code

Loading code sample...
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report.
For a full regex reference for Golang, please visit: https://golang.org/pkg/regexp/

Regular Expressions 101

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