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...
str="Hello World" if [[ "$str" == *"Hello"* ]]; then echo "String contains 'Hello'" else echo "String does not contain 'Hello'" fi
[ STRING1 > STRING2 ] 如果 “STRING1” sorts after “STRING2” lexicographically in the current locale则为真。 [ ARG1 OP ARG2 ] “OP” is one of -eq, -ne, -lt, -le, -gt or -ge. These arithmetic binary operators return true if “ARG1” is equal to, not equal to, less than,...
...AAAAABBAAA"; String b="B"; int count= (res.length()-res.replace(b,"").length())/b.length(); 原理很简单,用空格代替特定字符...,然后计算与以前字符串的长度差,再除以 特定字符的长度,即可得出A中所占b的个数。...=0; while (res.contains(b)){ res=res.substring(res.indexOf(b)+...
$ if [[ ${var} != ${var,,} ]]; then echo "The string contains uppercase letters." else echo "The string contains only lowercase letters." fi The string contains uppercase letters. Here, we compare${var}with${var,,}. The${var}variable holds the original string, while the${var,...
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) ...
if [[ "$1" =~ "$2" ]]; then echo \"$1\" contains \"$2\" else echo \"$1\" does not contain \"$2\" fi } check_substr "$1" "$2" 这个脚本判断传入的第二个参数是否为第一个参数的子字符串。 具体执行结果如下: $ ./check_substr.sh "This is a test string" "test string...
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...
string1="Hello World!" string2="Hello Bash!" if [[ $string1 == "Hello World!" ]] then printf "Same! \n" else print "Different! \n" fi if [[ $string2 = *"Bash"* ]] then printf "Contains word 'Bash'. \n" else printf "Does not contain the word. \n" ...
因此,你需要一组更复杂的测试代码 — 为了测试所有的情况,使用if-elif-else结构中的elif语句: [student@studentvm1 testdir]$ File="TestFile1" ; if [ -s $File ] ; then echo "$File exists and contains data." ; fi [student@studentvm1 testdir]$ ...