Intellij doesn’t show run button
Right click on src directory and select option Mark Directory As > Sources Root.
main-method
Invoking Java main method with parameters from Eclipse
This answer is based on Eclipse 3.4, but should work in older versions of Eclipse. When selecting Run As…, go into the run configurations. On the Arguments tab of your Java run configuration, configure the variable ${string_prompt} to appear (you can click variables to get it, or copy that to set it directly). Every time … Read more
Is there a “main” method in Ruby like in C?
@Hauleth’s answer is correct: there is no main method or structure in Ruby. I just want to provide a slightly different view here along with some explanation. When you execute ruby somefile.rb, Ruby executes all of the code in somefile.rb. So if you have a very small project and want it to be self-contained in … Read more
Should I define a main method in my ruby scripts?
I usually use if __FILE__ == $0 x = SweetClass.new(ARGV) x.run # or go, or whatever end So yes, you can. It just depends on what you are doing.
Arguments to main in C [duplicate]
The signature of main is: int main(int argc, char **argv); argc refers to the number of command line arguments passed in, which includes the actual name of the program, as invoked by the user. argv contains the actual arguments, starting with index 1. Index 0 is the program name. So, if you ran your program … Read more