if [",${var}," = *",${groups},"* ]; then echo"$var is in the list" else echo"$var is not in the list" fi 尝试这个,它仍然不匹配确切的字符串,因为我需要它。 相关讨论 这是什么语言? BASH脚本… 你能加个"bash"标签吗? 怎么样?stackoverflow.com/questions/229551/string-contains-in...
2. 另请参见:Bash String Comparison: Find Out IF a Variable Contains a Substring
The uses of the “-z” and “-n” option to test the string values using the “if” statement in Bash are shown in this tutorial. Using the “If -Z” Statement Sometimes, it is required to check if a string variable is empty or if it contains a string of zero length. There are...
The pattern will match if it matches any part of the string. Anchor the pattern using the ‘^’ and ‘$’ regular expression operators to force it to match the entire string. The array variable BASH_REMATCH records which parts of the string matched the pattern. The element of BASH_REMATC...
Thepatternwillmatchif itmatchesanypartofthe string. Anchor thepatternusingthe ‘^’and‘$’ regular expression operatorstoforce ittomatchthe entire string. Thearrayvariable BASH_REMATCH records which partsofthe string matched the pattern. The elementofBASH_REMATCHwithindex0containstheportionofthe string...
它会扩展成 值中以 为开始,长为 个字符的字符串。...它的使用方法为:借助 cut 命令可以使用 命令来将文件中每一行或者变量中的一部分删掉。...它的语法为:想了解更多请阅读 bash 的 man 页:另请参见:Bash String Comparison: Find Out IF a Variable Contains a Substring 1.8K90 如何在 Bash Shell ...
Unlike many other programming languages, Bash does not segregate its variables by "type." Essentially,Bash variables arecharacter strings, but, depending on context, Bash permits arithmetic operations and comparisons on variables. The determining factor is whether the value of a variable contains only...
/bin/bash # declare STRING variable STRING="Hello World" #print variable on a screen echo $STRING Navigate to a directory where your hello_world.sh is located and make the file executable: $ chmod +x hello_world.sh Now you are ready to execute your first bash script:...
if [[ $string2 = *"Bash"* ]] then printf "Contains word 'Bash'. \n" else printf "Does not contain the word. \n" fi 如何把for语句放在一行里执行? #!/bin/bash # For statement in multiple lines for((i=1;i<10;i+=2))
-R varname True if the shell variable varname is set and is a name reference. -z string True if the length of string is zero. -n string True if the length of string is non-zero. string1 == string2string1 = string2 True if the strings are equal. It will perform pattern matching...