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--- bash:how_to:start [2018/08/02 22:31]
Rob Stroess
+++ — (current)
@@ Line 1: / Line 1: @@
-===== bash: "How To"=====
-^operation^what^code^example export TST="abcabcaa"^result^
-|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

on the occasion of the current invasion of Russia in Ukraine