Exceptions

exceptions.rb

# credits goes to SKORKS
# http://www.skorks.com/2009/09/ruby-exceptions-and-exception-handling/

# raise an exception
raise TypeError, 'You must give me truth' if value == false

# raise RuntimeError
raise "Hello"

# basic block
begin
  raise "foo"
rescue StandardError => e # or rescue => e
  puts e.message
  puts e.backtrace
ensure
  puts "Hello World"
end

# create your own

class MyCrazyException < StandardError
end
 
raise MyCrazyException, "I am a crazy new exception"


# Ruby hierarchy
```
Exception
 NoMemoryError
 ScriptError
   LoadError
   NotImplementedError
   SyntaxError
 SignalException
   Interrupt
 StandardError
   ArgumentError
   IOError
     EOFError
   IndexError
   LocalJumpError
   NameError
     NoMethodError
   RangeError
     FloatDomainError
   RegexpError
   RuntimeError
   SecurityError
   SystemCallError
   SystemStackError
   ThreadError
   TypeError
   ZeroDivisionError
 SystemExit
 fatal
 ```