# now cut out the last char rval=`echo -n "$1" | cut -b $numofchar` } chop() { # remove the last character in string and return it in $rval if [ -z "$1" ]; then # empty string rval="" return fi # wc puts some space behind the output this is why we need sed: nu...
# empty string rval="" return fi # wc puts some space behind the output this is why we need sed: numofchar=`echo -n "$1" | wc -c | sed 's/ //g' ` # now cut out the last char rval=`echo -n "$1" | cut -b $numofchar` } chop() { # remove the last character in...
_upword() #@ USAGE: upword STRING { local word=$1 while [ -n "$word" ] ## loop until nothing is left in $word do to_upper "$word" _UPWORD=$_UPWORD$_UPR word=${word#?} ## remove the first character from $word done } upword() { _upword "$@" printf "%s\n" "$_UP...
character integer string javascript 转载 编程小达 8月前 181阅读 bash字符串截取的8种方法 Linux 的字符串截取很有用。有八种方法。 假设有变量 var=http://www.aaa.com/123.htm. 1. # 号截取,删除左边字符,保留右边字符。 复制代码代码如下: echo ${var#*//} 其中 var 是变量名,# 号是运算符,*/...
Notably, we had to escape each of the two double quotes enclosing an empty string within thegsub()function. Additionally, we’ve escaped each of the three quotation characters within the character class so that their interpretation is literal. ...
character integer string javascript 转载 编程小达 8月前 166阅读 字符串截取java字符串截取js 这篇主要说一说截取字符串的方法,用于帮助自己缕清方法的作用,参数的意义,返回值,是否对于原来的字符串进行了操作等。 在javascript中,常见的截取字符串的方法有slice()、substring()、substr()这三种方法,我主要为了捋...
Let’s break down what’s going on in the Bash script you just created. Bash executes programs in order from the first line in your file to the last line. Theexprcommand can be used toevaluateBashexpressions. An expression is just a valid string of Bash code that, when run, produces ...
Use regex on a stringThe result of bash's regex matching can be used to replace sed for a large number of use-cases.CAVEAT: This is one of the few platform dependent bash features. bash will use whatever regex engine is installed on the user's system. Stick to POSIX regex features if...
!n 执行第n个命令!!执行上一个命令!STRING 执行最近一次以STRING开头的命令## 执行历史命令# !! 运行上一条命令# !88 运行第88条命令# !ca 运行上一个包含ca的命令## 搜索历史命令使用ctrl+r搜索历史中的字符串,重复按ctrl+r可以在历史命令列表中不断的向前搜索包含字符串的命令,回车就会执行查找的命令 ...
OPTIONS In addition to the single-character shell options documented in the description of the set builtin command, bash inter- prets the following options when it is invoked: -c string If the -c option is present, then commands are read from string. If there are arguments after the string...