playing around with inline rescues

inline_rescue.rb

#!/usr/bin/env ruby -wKU


# describe "enigma" do
#   it "fails, but why" do
#     lambda { begin; 2 / 0 rescue NoMethodError; end }.
#       should raise_error(ZeroDivisionError)
#   end

# the inline rescue is swallowing the ZeroDivisionError exception and 
# returning the NoMethodError class

# this is essentially the same as:
begin
  2 / 0 rescue NoMethodError # => NoMethodError
end

# to see it more clearly
begin
  2 / 0 rescue "NoMethodError" # => "NoMethodError"
end

# or
begin
  2 / 0 rescue "I've been rescued!" # => "I've been rescued!"
end

 
#   it "passes, but why" do
#     lambda { begin; 2 / 0; rescue NoMethodError; end }.
#       should raise_error(ZeroDivisionError)
#   end
# end

# here you are no longer dealing with an inline rescue
begin
  2 / 0
rescue NoMethodError
  "never sees the light of day"
end 
# ~> -:37:in `/': divided by 0 (ZeroDivisionError)
# ~> 	from -:37



# but...
begin
  2 / 0
rescue NoMethodError
  "never sees the light of day" # => 
rescue ZeroDivisionError
  "division by zero is undefined" # => "division by zero is undefined"
end