[Solved] Find the bug in this Ruby code: def check_type(obj) if obj.is_a?(Array) puts "Array detected" elsif obj.class == Hash puts "Hash detected" else puts "Unknown type" end end class MyHash < Hash;... | Ruby

Ruby - Variables and Data Types

Find the bug in this Ruby code:

def check_type(obj)
  if obj.is_a?(Array)
    puts "Array detected"
  elsif obj.class == Hash
    puts "Hash detected"
  else
    puts "Unknown type"
  end
end

class MyHash < Hash; end

check_type(MyHash.new)

ANo bug, code works correctly

BMissing return statement in method

CUsing obj.class == Hash instead of obj.is_a?(Hash)

DWrong method call syntax

Step-by-Step Solution

Solution:

Step 1: Understand type checks used
First condition uses .is_a?(Array), second uses .class == Hash.
Step 2: Identify inconsistency and potential bug
.class == Hash fails if obj is subclass of Hash; .is_a?(Hash) is safer and consistent.
Final Answer:
Using obj.class == Hash instead of obj.is_a?(Hash) -> Option C
Quick Check:
Use .is_a? for subclass-safe checks [OK]

Quick Trick: Prefer .is_a? over .class == for type checks [OK]

Common Mistakes:

MISTAKES

Mixing .class == with .is_a?
Ignoring subclass behavior
Assuming no bug if code runs

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Find the bug in this Ruby code:

Step 1: Understand type checks used

Step 2: Identify inconsistency and potential bug

Final Answer:

Quick Check:

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