if [[ "$config" =~ $WorkingDirPattern ]]; then WorkingDir="${BASH_REMATCH[1]}" # get the contents of the first capture group echo "WorkingDir is $WorkingDir" else echo "No WorkingDir found" >&2 fi 本站已为你智能检索到如下内容,以供参考: 🐻 相关问答7个 1、regex lookback中的...
TEMP=$(echo $SVAR | sed ‘s/.*\(regex\).*/\1/’) 这样就可以在变量SVAR中找到对应regex的内容,然后把它提取出来。regex两边的 \( 和 \) 用来把regex对应的内容形成一个组(group),然后 \1 表示把SVAR的所有内容替换成第一组的内容,也就是regex能够match的那一部分。如果找不到与regex对应的部分,那...
TEMP=$(echo $SVAR | sed 's/.*\(regex\).*/\1/') 这样就可以在变量SVAR中找到对应regex的内容,然后把它提取出来。regex两边的 \( 和 \) 用来把regex对应的内容形成一个组(group),然后 \1 表示把SVAR的所有内容替换成第一组的内容,也就是regex能够match的那一部分。如果找不到与regex对应的部分,那么...
#!/bin/bash input="<tag1><tag2>content</tag2></tag1>" regex="<tag2>(.*?)</tag2>" if [[ $input =~ $regex ]]; then echo "Matched content: ${BASH_REMATCH[1]}" else echo "No match found." fi 基础概念 正则表达式:一种强大的文本处理工具,用于搜索、替换、检查字符串是否符合某...
(echo"$date"|grep-Eq^regex$)&&echo"matched"||echo"did not match" 需要注意的是,上述正则表达式并不完全准确,因为它没有考虑到每个月实际的天数和闰年的情况。例如,它会匹配20240230这样的日期,尽管2月没有30日。 如果你需要更精确地匹配有效日期,可以使用如下方式做检查: ...
The output: Points: 1. if [[ $string =~ $regex ]]; then... The operator '=~' is for the regex comparation while '==' is for the value camparation. 2. just as other languages, we need backslashes to match special charators....
In addition to logical flags there are also logical operators. One of the most useful logical operators is the regex match operator=~. The regex match operator compares a string to a regular expression and if the string is a match for the regex then the expression is equivalent totrue, othe...
所以,最终的regex表达式: ([[:alpha:][:blank:]]*)- ([[:digit:]]*) - (.*)$ 三个圆括号包裹的子表达式,被映射到内置变量BASH_REMATCH数组中,数组第0项表示整条regex语句,其他分别按1、2、3等一一对应。它也是一个内置变量。 for CDTRACK in * do if [[ "$CDTRACK" =~ "([[:alpha:][:...
In order to look for an exact match, your regex pattern needs to add extra space before and after the value like (^|[[:space:]])"VALUE"($|[[:space:]]). [me@linux ~]$ [[ ${myAssociativeArray[*]} =~ (^|[[:space:]])"12"($|[[:space:]]) ]] && echo 'yes' || echo...
echo{1..$n}# Works in ksh, but not bash/dash/shecho{1..10}# Works in ksh and bash, but not dash/shecho-n 42# Works in ksh, bash and dash, undefined in shexpr match str regex# Unportable alias for `expr str : regex`trap'exit 42'sigint# Unportable signal speccmd &> file#...