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...
= 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, respectively, and 1 otherwise. Any part of the pattern...
stringItem="Hello" #This will match since it is looking for an exact match with $stringItem if [[ $stringItem = "Hello" ]] then echo "The string is an exact match." else echo "The strings do not match exactly." fi #This will utilize the then statement since it is not looking fo...
if[[$str=~ 200[0-5]+ ]];thenecho"regex_matched"fi 如果你想的话,也可以用内联条件语句来替换 if 语句,如下所示: [[$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...
if [[ ${#string} != ${#string_two} ]]; then run commandfi Bash—获取命令(字符串)的值,并查看它是否与另一个字符串匹配 您检查的是返回码(一个数字),而不是文本。 这可能会奏效: VPN_status="$(cyberghostvpn --status)"echo $VPN_statusif [[ $VPN_status == "No VPN connetions found....
STRING True if string is not empty. 即,test命令使用-z STRING操作符来判断STRING字符串的长度是否为 0。 如果为 0,就是空字符串,会返回 true。 具体写法是test -z STRING,使用[命令则写为[ -z STRING ]。 -n STRING操作符判断STRING字符串的长度是否为 0。
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]...
{ x: 10, y: 20 }; //模式匹配 let Point { x, y } = p...("x=2"), //"_"相当于java中switch的default _ => println!...另外_在模式匹配中,还可以避免所有权转移: let s = Some(String::from("hello")); //由于_不关注值,所以s的所有权不会move到_ if let...("p中的x,y匹配...
string1 != string2 True if the strings are not equal. string1 =~ regex True if the strings match the Bash regular expression regex. Captured groups are stored in the BASH_REMATCH array variable. string1 < string2 True if string1 sorts before string2 lexicographically. ...
match(string,regexp)在字符串string中寻找符合regexp的最长、最靠左边的子字符串。返回值是regexp在string的开始位置,即index值。match函数将会设置系统变量RSTART等于index的值,系统变量RLENGTH等于符合的字符个数。如果不符合,则会设置RSTART为0、RLENGTH为-1。