Ruby - Hashes
Find the bug in this Ruby code:
```ruby
def print_info(opts = {})
puts "Name: #{opts[:name]}"
puts "Age: #{opts[:age]}"
end
print_info(name: 'Bob', age: 40, city: 'NYC')
```
Find the bug in this Ruby code: ```ruby def print_info(opts = {}) puts "Name: #{opts[:name]}" puts "Age: #{opts[:age]}" end print_info(name: 'Bob', age: 40, city: 'NYC') ```
medium📝 Debug Q7 of 15
Step-by-Step Solution
Solution:
Step 1: Understand hash parameter flexibility
Ruby methods accept hashes with extra keys without error.Step 2: Confirm output behavior
Only :name and :age keys are used; :city is ignored safely.Final Answer:
No bug; extra keys in hash are ignored safely -> Option AQuick Check:
Extra hash keys do not cause errors [OK]
Quick Trick: Extra keys in hash do not cause errors [OK]
Common Mistakes:
- Expecting error on unknown keys
- Thinking method must list all keys explicitly
- Confusing hash keys with method parameters
Master "Hashes" in Ruby
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