regex(){# Usage:regex"string""regex"[[$1=~$2]]&&printf'%s\n'"${BASH_REMATCH[1]}"} 示例用法: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 $ # Trim leading white-space.$ regex' hello''^\s*(.*)'hello $ # Validate a hex color.$ regex"#FFFFFF"'^(#?([a-fA-F0-9]{...
accordingly (as in regex(3)). The return value is 0 if the string matches the pattern, and 1 otherwise. If the regular expression is syntactically incorrect, the conditional expression’s return value is 2. If the shell option nocasematch is enabled, the match is performed without regard t...
if [[ "$config" =~ $WorkingDirPattern ]]; then WorkingDir="${BASH_REMATCH[1]}" # get the contents of the first capture group echo "WorkingDir is $WorkingDir" else echo "No WorkingDir found" >&2 fi 本站已为你智能检索到如下内容,以供参考: 🐻 相关问答7个 1、regex lookback中的...
echo "The string contains a digit." else echo "The string does not contain a digit." fi Example 3: 提取正则匹配 =~操作符也可用于提取匹配项。假设有一个日期字符串,我们想提取 day 、month 和 year #!/bin/bash date="23-05-2023" regex="([0-9]{2})-([0-9]{2})-([0-9]{4})" ...
[[$str=~ 200[0-5]+ ]] &&echo"regex_matched" 一旦Bash 解释器执行了一个正则表达式匹配,它通常会将所有匹配结果存储在 BASH_REMATCH shell 变量中。这个变量是一个只读数组,并将整个匹配的数据存储在第一个索引中。如果使用子模式,则 Bash 会逐步将这些匹配项存储在其他索引中: ...
使用expr match 进行正则表达式匹配 expr match "$STR" "$REGEX" expr "$STR" : "$REGEX" 打印与正则表达式匹配的长度。 man expr 写道 STRING : REGEXP anchored pattern match of REGEXP in STRING match STRING REGEXP same as STRING : REGEXP [root@jfht ~]# STR=Hello [root@jf...
使用String.matches方法判断是否包含子串,注意正则表达式元字符的转义 boolean matches(String regex) Tells whether or not this string matches the given regular expression. if (str.matches(".*"+sub+".*")) { // do something } StringUtils.contains ...
regex() { # Usage: regex "string" "regex" [[ $1 =~ $2 ]] && printf '%s\n' "${BASH_REMATCH[1]}" } 示例 $ regex "Hello, World!" "(Hello), (World)!" Hello $ regex "Hello, World!" "(HelloE), (World)!" 函数的输入参数如下:$1:需要应用正则表达式的字符串;$2:正则表达...
if [[ "$string" =~ ^regex$ ]]; then echo "Matched" else echo "Did not match" fi 这里^regex$表示匹配以regex开头的字符串,并且该字符串以regex结尾。 正则表达式在Bash中通常与grep、sed、awk等工具结合使用,用于文本搜索、替换和验证等操作。 示例 通配符匹配示例: bash # 列出当前目录下所有.txt...
When the == and != operators are used, the string to the right of the operator is considered a pattern and matched according to the rules described below under Pattern Matching. The return value is 0 if the string matches or does not match the pattern, ...