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bash:how_to:start
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bash: "How To"
| operation | what | code | example using: export TST='abcabcaa' | result from abcabcaa |
|---|---|---|---|---|
| remove | first occurence of substring 'xyz' in string | STR=${STR/'xyz'} | echo ${TST/'bc'} | aabcaa |
| substring 'xyz' everywhere in string | STR=${STR//'xyz'} | echo ${TST//'bc'} | aaaa | |
| substring 'xyz' at very beginning of string | STR=${STR#'xyz'} | echo ${TST#'abca'} | bcaa | |
| substring 'xyz' at very end of string | STR=${STR/%xyz} | echo ${TST%'bcaa'} | abca | |
| first n characters | STR=${STR:n} | echo ${TST:2} | cabcaa | |
| last n characters | STR=${STR:-n} | echo ${TST::-3} | abcab | |
| extract | all characters after (!) position n (first char position: n=0) | STR=${STR:n} | echo ${TST:1} | bcabcaa |
| m characters after (!) position n | STR=${STR:n:m} | echo ${TST:1:5} | bcabc | |
| characters after (!) position n until end of string minus m | STR=${STR:n:-m} | echo ${TST:1:-1} | bcabca |
on the occasion of the current invasion of Russia in Ukraine
bash/how_to/start.1533243138.txt · Last modified: 2024/02/16 01:02 (external edit)
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