2021年3月3日
Learning_the_bash_Shell_Third_Edition 8/n
摘要： Command Substitution The command inside the parentheses is run, and anything the command writes to standard output is returned as the value of the exp 阅读全文
posted @ 2021-03-03 18:01 碧水东流至此回 阅读(80) 评论(0) 推荐(0)
Learning_the_bash_Shell_Third_Edition 7/n(chapter 4, page[117|99])
摘要： Extended Pattern Matching Operator Meaning *(patternlist) Matches zero or more occurrences of the given patterns. +(patternlist) Matches one or more o 阅读全文
posted @ 2021-03-03 11:09 碧水东流至此回 阅读(64) 评论(0) 推荐(0)
Learning_the_bash_Shell_Third_Edition 6/n(chapter 4, page[117|99])
摘要： Length Operator(chapter 4, page[117|99]) There is one remaining operator on variables. It is ${#varname}, which returns the length of the value of the 阅读全文
posted @ 2021-03-03 11:08 碧水东流至此回 阅读(47) 评论(0) 推荐(0)
Learning_the_bash_Shell_Third_Edition 5/n
摘要： Patterns and Pattern Matching wildcard(通配符) Operator Meaning ${variable#pattern} If the pattern matches the beginning of the variable’s value, delete 阅读全文
posted @ 2021-03-03 10:47 碧水东流至此回 阅读(56) 评论(0) 推荐(0)