Using RegEx
Full RE2 syntax reference at > https://github.com/google/re2/wiki/Syntax
Go RegExp doc at > https://golang.org/pkg/regexp/
More about general concepts > http://www.regular-expressions.info
Basics of Regular Expressions
Match
Don't match
Match A or B
You can match a word by putting it between two brackets.
As example, this will only match the word "Dinosaur":
(Dinosaur)
Using
?:
after opening parenthesis of a capturing group creates a non-capturing group. Useful for example with template function reFindAllSubmatches
.This will not sub-match the words "red, blue, green":
{{ reFindAllSubmatches `(?:color=)(red|blue|green)` "color=red beautiful" }}
To clarify more - it will not show
dateid,
because it's a whole match:
{{ slice (index (reFindAllSubmatches `(?:dateid=)([0-9]{5})` "dateid=12345") 0) 1 }}
You may also want to catch multiple options, for that we use a "Vertical bar" or also known as a "Pipe" between linux users.
As example, this will match if either "Cat" or "Dog" is present:
(Cat|Dog)
To match anything of any length, use
.*
.Character classes
Words
Characters
Special Characters
To match a word, you put it between two brackets.
Example:
(Banana)
Sometimes you have to use special characters but it may cause conflicts. In this case, you will have to use an escape character.
For example, this is a star that doesn't interfere with other matches
\*
.If you still do not know what Regex are or want to know more. Check out the cheat sheet on the site below.
Last modified 1mo ago