不幸的是,它附带了bashVersion3.1,所以当我尝试在shell脚本中做一些事情时,比如在$y是正则表达式的情况下,我得到消息“条件二进制运算符期望”在`=~附近是否有一个版本的bash.exe是bash3.2或更高版本?如果不是,我如何根据3.1中的模式测试字符串? 浏览0提问于2013-09-09得票数 1 回答已采纳 1回答 调用带参数...
Whenever we upper-bound such a dependency, we should always comment why we are doing it - i.e. we should have a good reason why dependency is upper-bound. And we should also mention what is the condition to remove the binding.
Aproportional–integral–derivative (PID) controlleris a control loop feedback mechanism used throughout industry for controlling systems. It efficiently brings a measurable condition, such as temperature, to a desired state (setpoint). A well-tuned PID controller can raise to a setpoint quickly, ha...
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syntax of if condition in ksh is wrong The syntax of 'if' conditionals in bash and ksh seems different. I am trying to check for a particular version using 'if' in ksh. This very simple syntax gives syntax error. I have tried many variants, but no go. Please correct the syntax. La...
echo "The string \"$input_str\" is not a palindrome.": Prints a message indicating that the input string is not a palindrome if the condition is false. 10. Write a Bash script that checks if a user is logged in and if they are, prints their username, otherwise prints "User is not...
| $container = New-PesterContainer ` -Path 'deploy/Website.Tests.ps1' ` -Data @{ HostName = '$(appServiceAppHostName)' } Invoke-Pester ` -Container $container ` -CI - task: PublishTestResults@2 name: PublishTestResults displayName:...
untilis a loop control structure in Bash that executes the loop as long as the condition[ $count -le 0 ]is false. In this case, the loop continues until the value ofcountis less than or equal to 0. ((count=count-1))decrements the value ofcountby 1. It subtracts 1 from the curre...
In contrast, a terminating error signifies a condition in which execution cannot possibly continue and the command is terminated. The core of the error-handling system is exposed by the trap keyword. The keyword is always followed by a script block that contains instructions for what to do when...