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Hizenberg469
2024-11-21 22:56:37 +05:30
parent 847beb446f
commit 5759f3f807
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Bash-Scripting.txt
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@@ -297,4 +297,42 @@
[[ $STR1 =~ $regex ]] [[ $STR1 =~ $regex ]]
-> Wildcards (globbing patterns)
|-----------------------------------------------------------------------|
| Symbol | Description | Example | Example matches |
|-----------------------------------------------------------------------|
| ? | Single | hel? | help, hell, |
| | character | | hel1.... |
|-----------------------------------------------------------------------|
| * | Any number of | ca* | car,ca,carpet, |
| | characters | | carpenter,car112.. |
| | (including zero)| | |
|-----------------------------------------------------------------------|
| [] | Single character| file[0-2] | file0,file1,file2 |
| | from range | [hd]ello | hello or dello |
|-----------------------------------------------------------------------|
| {} | Comma seperated | {*.txt, | hello.txt,doc.txt, |
| | terms | *.pdf} | source.pdf, book.pdf|
|-----------------------------------------------------------------------|
| [!] | Any character | file[!1] | file2,file3.... |
| | listed in | | |
| | brackets | | |
|-----------------------------------------------------------------------|
* some useful character classes: (use it within [])
|-------------------------------------------|
| [:upper:] | Uppercase character |
| [:lower:] | Lowercase character |
| [:alpha:] | Alphabetic character |
| [:digit:] | Number character |
| [:alnum:] | Alphanumric character |
| | (alpha + digit) |
| [:space:] | whitespace character |
| | (space, tab, newline) |
|-------------------------------------------|
* [[ $STRING == pattern_with_wildcards ]]
* [[ $STRING == file[0-9].txt ]]
* [[ $STRING == rich* ]]