How do you find a regex for all items between certain characters? (e.g. between [ ] or between ( )). Below is an example that finds anything between @ and .
use case: email.... using it on "hahah@trefis.com" will find "trefis"
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REGEX
(?<=@)(.*?)(?=\.)
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SAMPLE SET
This is my first sentence. This is my second sentence.
haha@gmail.com
hello how are you
123@haha.co
This is my first sentence
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EXPLANATION
(?<=@)TEST ....positive lookbehind. Find anything where "@" is just behind TEST
(.*?) ....find all characters (.), one ore more (*), make it nongreedy so it stops at the first not last result (?)
(?=\.) .....positive lookahead. It must have a lookahead character that is a ".". backslash needed so activate the character itself
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https://regex101.com/r/eZ1gT7/1637
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| screenshot of regex in action |