Ruby - Methods
You want to write a method that accepts any number of arguments and returns a hash where keys are the arguments and values are their types as strings. Which method correctly does this?
You want to write a method that accepts any number of arguments and returns a hash where keys are the arguments and values are their types as strings. Which method correctly does this?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand how to create a hash from an array
Usingmapto create pairs and thento_hconverts to a hash.Step 2: Evaluate each option
def types_hash(*args) args.map { |a| [a, a.class.to_s] }.to_h end correctly maps each argument to a pair [argument, type string] and converts to hash. def types_hash(*args) args.to_h { |a| [a, a.class] } end does not convert class to string. def types_hash(*args) args.each { |a| [a, a.class.to_s] } end useseachwhich returns original array, not hash. def types_hash(*args) args.collect { |a| a.class } end returns array of classes, not a hash.Final Answer:
def types_hash(*args) args.map { |a| [a, a.class.to_s] }.to_h end -> Option BQuick Check:
Use map + to_h to build hash from *args [OK]
Quick Trick: Use map to create pairs, then to_h to build hash [OK]
Common Mistakes:
- Using each instead of map for transformation
- Incorrect block syntax with to_h
- Returning array instead of hash
Master "Methods" in Ruby
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore Ruby Quizzes