command

问题 I'm using JRI to execute R from Java and I saw that JRI use the eval() method to execute the R commands. I have one R script for execution. How I can load this script in JRI and execute it? 回答1: You can run an entire script with the R command source() 来源： https://stackoverflow.com/questions/8037411/how-i-can-load-a-r-script-into-jri-and-execute-from-java

问题 I want to perform an action from a custom command. The forward method Controller.php class provides this function, but I do not know access it from the execute () method of the command file 回答1: Making the controller a service will result in performance overhead because of the request stack, as it then should return a HttpResponse . The Request scope will not be very usefull in the command. I'd advise you to refactor the action from the Controller to a separate service class definition, and

问题 It is often specified in the various tutorials of MVVM, that the goal of MVVM is not to eliminate the code-behind and that some event-handling may still be necessary in the code-behind. What are the scenarios in which you need to write events in code-behind rather than using commands in viewmodel? 回答1: In general, if your code pertains to UI logic, keep it in the view's XAML or code-behind. The view model is only responsible for bridging and binding data between the view and the model. An

问题 In the following command i want to search only only the directories which are non hidden how can i do this using the following command .Iwant to ignore hidden directories while searching the log file find /home/tom/project/ -name '.log.txt' ls /home/tom/project/ dir1 dir2 .backup .snapshot/ .ignore/ 回答1: Try find /home/tom/project -type d -name '.*' -prune -o -name .log.txt -print 回答2: This will find all files but ignore those that start with a dot so hidden files. find /home/tom/project/

问题 I want to create a batch file that writes the local IP address on a txt file. When i run a batch file with this code (file path is wrong but that's not the problem): ipconfig | find "IP Address" > \File.txt I get the whole windows IP configuration (I changed some numbers and stuff with xxx to not show all info) IP Address. . . . . . . . . . . . : 100.100.100.223 IP Address. . . . . . . . . . . . : 192.xxx.xxx.xxx I want to write to a file only 100.100.100.223 . I'm new to batch files and i

问题 I have installed Kafka as well zookeeper. Zookeeper is working fine. However, when I try to run Kafka server, I get the below error. Please help me with a solution for this problem. Thank you in advance!!! Command run from C:\kafka-0.9.0.1 : .\bin\windows\kafka-server-start.bat .\config\server.properties Error message: Classpath is empty. Please build the project first e.g. by running 'gradlew jarAll' 回答1: When you installed Kafka, did you download from a source download or a binary download?

问题 I have installed Kafka as well zookeeper. Zookeeper is working fine. However, when I try to run Kafka server, I get the below error. Please help me with a solution for this problem. Thank you in advance!!! Command run from C:\kafka-0.9.0.1 : .\bin\windows\kafka-server-start.bat .\config\server.properties Error message: Classpath is empty. Please build the project first e.g. by running 'gradlew jarAll' 回答1: When you installed Kafka, did you download from a source download or a binary download?

问题 Today I've just downloaded "dotnet-dev-osx-x64.1.0.0-preview1-002702.pkg" and installed it. After that I tried "dotnet" command in my terminal, nothing printed. I also tried Spotlight searching, seems nothing found. Where is this package installed at all? 回答1: The key thing is you need to locate the file dotnet.exe, then create a new Symbolic link to create a new shortcut link to that dotnet.exe file in the usr/local/bin folder. Sometimes you see this error "/usr/local/bin//dotnet: File

问题 I realize this might be a dumb question but I have a Centos-7 minimal server install and the "which" command does not exist or is missing. I have a script that needs it and I cannot find out what the yum package is that installs it. The code is below and is from a make file. which grep > /dev/null 2> /dev/null if test "$?" != "0" then echo "\"grep\" command not found." echo "Installation is aborted." exit 1 fi Any help would be appreciated... this is difficult if not impossible to google 回答1:

问题 Which is more proper to call INSERT/UPDATE/DELETE statements? Command or query? I would think "command," since "query" implies that you are asking a question and expecting to get your question answered (and more information than just "yes, this operation was performed successfully, and, optionally, here's your insert ID"). Just a question from a mid-level web application developer who was also an communications major and is one who enjoys specificity. :) 回答1: The generic term for a INSERT ,