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bash:how_to:start [2018/08/02 22:41] Rob Stroess working on it, lots still to come ... |
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- | ===== bash: "How To"===== | ||
- | ^operation^what^code^example using:\\ export TST='abcabcaa'^result from \\ abcabcaa^ | ||
- | |remove|first occurence of characters '__xyz__' in string|STR=${STR/'__xyz__'}|echo ${TST/'bc'}|aabcaa| | ||
- | |:::|all characters '__xyz__' in string|STR=${STR%%//%%'__xyz__'}|echo ${TST%%//%%'bc'}|aaaa| | ||
- | |:::|characters '__xyz__' at end of string|STR=${STR/%__x__}|echo ${TST%'bcaa'}|abca| | ||
- | |:::|first __n__ characters|STR=${STR:__n__}|echo ${TST:2}|cabcaa| | ||
- | |:::|last __n__ characters|STR=${STR:-__n__}|echo ${TST::-3}|abcab| | ||
- | |extract|all characters after position __n__|STR=${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| | ||
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