Debug Ruby code
- gem install ruby-debug (Ruby 1.8) or gem install debugger (Ruby 1.9)
- Start your server with script/server --debugger.
- Set a breakpoint by invoking debugger anywhere in your code.
- Open your application in the browser and run the code path that crosses the breakpoint.
Besides, what is pry for Ruby?
Pry is an interactive shell for the Ruby programming language. It is notable for its Smalltalk-inspired ability to start a REPL within a running program. This lets programmers debug and modify the current state of a system.
Beside above, what is pry coding? pry is essentially 'prying' into the current binding or context of the code, from outside your file. So when you place the line binding. pry in your code, that line will get interpreted at runtime (as your program is executed).
In this way, how do I read stack trace Ruby?
Stack traces
- On the first line in the stack trace above, we can see that a ZeroDivisionError was raised with “divided by 0” as its message.
- The stack trace's second line shows where the / method was called from.
- The last line shows that divide was called from <main> , which refers to the initial context of a Ruby application.
How do I run Ruby code?
- Press Ctrl twice to invoke the Run Anything popup.
- Type the ruby script. rb command and press Enter .
- (Optional) To run scratch files or scripts outside the project root, hold down the Alt key before running the command (in this case, the dialog title is changed to Run in Context ).
