regexrubyfluentd
Named capturing group to different names
I'm working on a logging stack based on Banzai Cloud ClusterFlow, we've a log that is currently parsed with a regular expression and placed in a specific name; however we would like to deprecate that name and replace it with a new one, let's say the pattern is just like the following one:
^(?<someName>[^ ]*) (?<someNameWeWishToDeprecate>[^ ]*)$
supposing we receive a log line such as
prop1 prop2
it will produce two properties in our parsed log:
someName=prop1
someNameWeWishToDeprecate=prop2
What we would like to obtain is instead
someName=prop1
someNameWeWishToDeprecate=prop2
someNewFancyNae=prop2
As you can see we'd like to keep the old name but also have the new one; is this possible by elaborating the regular expression?
FYI: the regular expression engine is ruby-based
Solution
You can nest the named capturing groups and use
^(?<someName>[^ ]*) (?<someNewFancyNae>(?<someNameWeWishToDeprecate>[^ ]*))$
Or,
^(?<someName>\S+)\s+(?<someNewFancyNae>(?<someNameWeWishToDeprecate>\S+))$
See the regex demo.
- How to combine all the words of a sentence extracted with a regex?
- How can I detect all symbols on mathematical operators on PHP using regex?
- RegEx for combining "match everything" and "negative lookahead"
- How to validate an Instagram username
- Parse video id and start time from differently formatted youtube URL strings
- Python - regex to grab specific lines from text
- how to escape texts for formatting in python
- Regex not correctly rejecting invalid music note values
- regex - error with result - too many occurence
- Parse a formatted, single-line string into an array of associative arrays with predefined column names
- How to split a string by any of multiple delimiters?
- std::regex escape special characters for use in regex
- Does lookbehind work in sed?
- Regex for complex delimited string with multiple parse patterns
- Parsing PDF tables into csv with php
- RegEx for "does not begin with"
- PHP regex starting and ending with < and > produces an unknown modifier warning
- Sanitize number by removing first digit then any consecutive zeros
- How to match one or more characters nominated in a regex character class?
- Sanitize a number which may include dollar symbols, hyphens and dots
- Validate a numeric filename which may only be between 01 and 12, then the file extension
- Regex for number check below a value (12)
- Validate a string containing a number, underscore, then an number with a maximum of 12 digits
- Regular expression that allows only a specific special character when it has a specific length
- java - regex pattern matching days, hours, minutes, seconds
- Regex pattern for matching words between two delimiters
- Matching a String in Python using regex
- How to match and extract string matching regular expression
- Problem subsetting a string from a filename
- Remove all non-alphanumeric characters but keep float values