Catching line numbers in ruby exceptions

Question

Consider the following ruby code

test.rb:

begin

  puts
  thisFunctionDoesNotExist
  x = 1+1
rescue Exception => e
  p e
end

For deb

Answer 1

You can access the backtrace from an Exception object. To see the entire backtrace:

p e.backtrace

It will contain an array of files and line numbers for the call stack. For a simple script like the one in your question, it would just contain one line.

["/Users/dan/Desktop/x.rb:4"]

If you want the line number, you can examine the first line of the backtrace, and extract the value after the colon.

p e.backtrace[0].split(":").last