true if the String contains the search character, false if not or null string input 判断是否包含另外的子串 org.apache.commons.lang.StringUtils contains方法 写道 public static boolean contains(String str, String searchStr) Checks if String contains a search String, handling null. This method uses ...
if [[ $str =~ [0-9]+ ]]; then 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]{...
搜索字符串是第一个参数，其余的是数组元素：containsElement () { local e match="$1" ...
[[ string1 =~ regex ]]上面的语法中,regex是一个正则表示式,=~是正则比较运算符。下面是一个例子。#!/bin/bash INT=-5 if [[ "$INT" =~ ^-?[0-9]+$ ]]; then echo "INT is an integer." exit 0 else echo "INT is not an integer." >&2 exit 1 fi上面代码中,先判断变量INT的字符...
str="Hello World" if [[ "$str" == *"Hello"* ]]; then echo "String contains 'Hello'" else echo "String does not contain 'Hello'" fi 这些方法可以帮助你在Bash中正确比较变量和字符串。请注意,变量在比较时需要使用双引号括起来,以避免由于特殊字符引起的错误。相关...
在上述代码中,首先将原始字符串和子串都转换为小写,然后使用${string%%substring}的语法来删除尾随子串。${string%%substring}表示从字符串的末尾开始,删除最长匹配的子串。 运行以上脚本,输出结果为Hello,即删除了尾随子串"world"。 对于Bash脚本的更多详细信息,可以参考腾讯云的产品文档:Bash脚本。
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...
valint() #@ USAGE: valint INTEGER case ${1#-} in ## Leading hyphen removed to accept negative numbers *[!0-9]*) false;; ## the string contains a non-digit character *) true ;; ## the whole number, and nothing but the number esac 如果函数体用括号括起来,那么它是在子 shell ...
- Test if a given string conforms the specified glob/regex: [[ $variable ==|=~ pattern ]] - Test if a given variable is [eq]ual/[n]ot [e]qual/[g]reater [t]han/[l]ess [t]han/[g]reater than or [e]qual/[l]ess than or [e]qual to the specified number: ...
The Regular Expression conditional operator =~ takes a string value on the left side and a Bash extended regular expression on the right side of the operator. Syntax: *string1* =~ *regex*. The operator return an exit code 0 (True) if the strings match the regular expression regex. ...