Here lies all the regular expressions that I found useful
regex101: build, test, and debug regex
get anything to the right of --
/(?<=\-\-).*/
get anything to the left of --
/^.*(?=\-\-)/
get anything between [ ]
/(?<=\[).*(?=\])/
finds string between ]( & ) → used to find string between ]( & ) i.e. [link](http://this.com)
/(?<=\]\().*(?=\))/g
replace any special characters that OS's don't like
STRING.replace(/[&#\@\!, +()$~%'":*?<>{}]/g, '_')
Only alphabet characters are allowed for this field. NO spaces
/^[aA-zZ]+$/,
phone number validation
/^([+]?\d{1,2}[-\s]?|)\d{3}[-\s]?\d{3}[-\s]?\d{4}$/
Standard Password
/^(?=.*[A-Z])(?=.*[!@#{{CODE_BLOCK_7}}*])(?=.*[0-9])(?=.*[a-z].*[a-z].*[a-z]).{8,40}$/
^ Start anchor
(?=.*[A-Z].*[A-Z]) Ensure string has two uppercase letters.
(?=.*[!@#{{CODE_BLOCK_8}}*]) Ensure string has one special case letter.
(?=.*[0-9].*[0-9]) Ensure string has two digits.
(?=.*[a-z].*[a-z].*[a-z]) Ensure string has three lowercase letters.
.{8} Ensure string is of length 8.
$ End anchor.
Find a every line that starts with (with wildcard). Useful with iTunes XML Playlist to m3u Converter
# don't forget to excape any slashes \/
^\/Volumes\/edata\/iMusicLibrary\/.*$
# select any line that starts with "#EXTINF:" could have any number after colon, and ends with comma.
# examples that are removed: "#EXTINF:177,", "#EXTINF:246,", "#EXTINF:192,"
^#EXTINF:.*?,
get file name extension
let file = url.match(/?<=\.)[^.\\/:*?"<>|\r\n]+$/)
console.log(file[0])
remove file extension from path
filePath.replace(/\.[^/.]+$/, '')
[[http
const regex = \[\[(http.*?)\]\]
// replace string
[link]($1)
// `---
{"dg-publish":true,"permalink":"/developer/Regex/","created":"2024-02-29T22:19:55.735-06:00","updated":"2024-03-01T00:21:37.000-06:00"}
---
Here lies all the regular expressions that I found useful
[regex101: build, test, and debug regex](https://regex101.com/)
get anything to the right of `--`
```js
/(?<=\-\-).*/
get anything to the left of --
/^.*(?=\-\-)/
get anything between [ ]
/(?<=\[).*(?=\])/
finds string between ]( & ) → used to find string between ]( & ) i.e. [link](http://this.com)
/(?<=\]\().*(?=\))/g
replace any special characters that OS's don't like
STRING.replace(/[&#\@\!, +()$~%'":*?<>{}]/g, '_')
Only alphabet characters are allowed for this field. NO spaces
/^[aA-zZ]+$/,
phone number validation
/^([+]?\d{1,2}[-\s]?|)\d{3}[-\s]?\d{3}[-\s]?\d{4}$/
Standard Password
/^(?=.*[A-Z])(?=.*[!@#{{CODE_BLOCK_7}}*])(?=.*[0-9])(?=.*[a-z].*[a-z].*[a-z]).{8,40}$/
^ Start anchor
(?=.*[A-Z].*[A-Z]) Ensure string has two uppercase letters.
(?=.*[!@#{{CODE_BLOCK_8}}*]) Ensure string has one special case letter.
(?=.*[0-9].*[0-9]) Ensure string has two digits.
(?=.*[a-z].*[a-z].*[a-z]) Ensure string has three lowercase letters.
.{8} Ensure string is of length 8.
$ End anchor.
Find a every line that starts with (with wildcard). Useful with iTunes XML Playlist to m3u Converter
# don't forget to excape any slashes \/
^\/Volumes\/edata\/iMusicLibrary\/.*$
# select any line that starts with "#EXTINF:" could have any number after colon, and ends with comma.
# examples that are removed: "#EXTINF:177,", "#EXTINF:246,", "#EXTINF:192,"
^#EXTINF:.*?,
get file name extension
let file = url.match(/?<=\.)[^.\\/:*?"<>|\r\n]+$/)
console.log(file[0])
remove file extension from path
filePath.replace(/\.[^/.]+$/, '')
[[http
find replace string between `[`and `](`
```js
const regex = \[(.*)\]\((.*)\)
replace string --> $1
An <input> element with type="email" that must be in the following order: characters@characters.domain (characters followed by an @ sign, followed by more characters, and then a "."
After the "." sign, add at least 2 letters from a to z:
<form action="/action_page.php">
<label for="email">Email:</label>
<input type="email" id="email" name="email"
pattern="[a-z0-9._%+\-]+@[a-z0-9.\-]+\.[a-z]{2,}$">
<input type="submit">
</form>