Checks if String contains a search String, handling null. This method uses String.indexOf(String). A null String will return false. StringUtils.contains(null, *) = false StringUtils.contains(*, null) = false StringUtils.contains("", "") = true StringUtils.contains("abc", "") = true Str...
在Bash中,if条件语句用于根据条件的真假执行不同的代码块。 当使用if条件在比较特定字符串时不匹配时,可能是由于以下原因: 字符串比较时未使用正确的语法:在Bash中,字符串比较应使用双括号[[ ]]或双方括号[ ],并且在比较运算符周围使用空格。例如,正确的语法是[[ $string == "specific_string" ]]或...
str="Hello World" if [[ "$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。
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. Any part of the pattern may be quoted to force the quoted portion to be matched as a string. 即,使用=~操作符时...
var="$(cut -d' ' -f 4 <<< $u)" echo"${var}" 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 想了解更多请阅读 bash 的 man 页: 复制 manbash mancut 1. 2. 另请参见:Bash String Comparison: Find Out IF a Variable Contains a Substring...
File contains at last on occurence of root4.一个if/then结构可以包含多级比较和tests(嵌套)if[ condition -true] then command1command2...else#可选 command3command4... fi 当if和then在一个条件测试的同一行时,必须用";"来终止if表达式(因为:if和then都是关键字) ...
String digest = "111电子元件电子元器件,电子元件电子元器件,电子元件电子元器件[bankDepositExp]"; if(digest.contains("[bankDepositExp]")){ digest = digest.replace("[bankDepositExp]","银行存款支出"); }如果[bankDepositExp]前面有数据则在前面加逗号,如果后面有 ...
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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))
string1="Hello World!" string2="Hello Bash!" if [[ $string1 == "Hello World!" ]] then printf "Same! \n" else print "Different! \n" fi if [[ $string2 = *"Bash"* ]] then printf "Contains word 'Bash'. \n" else printf "Does not contain the word. \n" ...