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Add proper footnotes to tutorial.md #1235

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858d8e7
Add proper footnotes to tutorial.md
rdwebdesign Apr 21, 2025
106633f
Changing footnotes placement
rdwebdesign Apr 26, 2025
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12 changes: 7 additions & 5 deletions docs/regex/tutorial.md
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Original file line number Diff line number Diff line change
Expand Up @@ -92,10 +92,10 @@ In addition to character groups, there are also some special character classes a
Character class | Equivalent | Pi-hole specific | Interpretation
--------------- | ---------------- | ---------------- | ---------------
`[[:digit:]]` | `[0-9]` | No | digits
`[[:lower:]]` | `[a-z]` | No | lowercase letters*
`[[:upper:]]` | `[A-Z]` | No | uppercase letters*
`[[:alpha:]]` | `[A-Za-z]` | No | alphabetic characters*
`[[:alnum:]]` | `[A-Za-z0-9]` | No | alphabetic characters* and digits
`[[:lower:]]` | `[a-z]` | No | lowercase letters[^*]
`[[:upper:]]` | `[A-Z]` | No | uppercase letters[^*]
`[[:alpha:]]` | `[A-Za-z]` | No | alphabetic characters[^*]
`[[:alnum:]]` | `[A-Za-z0-9]` | No | alphabetic characters[^*] and digits
`[[:blank:]]` | `[ \t]` | Yes | blank characters
`[[:cntrl:]]` | N/A | Yes | control characters
`[[:graph:]]` | N/A | Yes | all printable characters except space
Expand All @@ -104,7 +104,9 @@ Character class | Equivalent | Pi-hole specific | Interpretation
`[[:space:]]` | `[ \f\n\r\t\v]` | Yes | white-space characters
`[[:xdigit:]]` | `[0-9a-fA-F]` | Yes | hexadecimal digits

\* FTL matches case-insensitive by default as case does not matter in domain names
///Footnotes Go Here///

[^*]: FTL matches case-insensitive by default as case does not matter in domain names

Note that character classes are abbreviations, they need to be used in character groups, i.e., enclosed in `[]`. As such, the equivalent of `[0-9]` would be `[[:digit:]]`, *not* `[:digit:]`. It is allowed to mix character classes with classical character groups. For example, `[a-z0-9]` is identical to `[a-z[:digit:]]`.

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