Ruby - File IO
What is the output of this Ruby code?
require 'json'
json_str = '{"age":30,"city":"NY"}'
ruby_obj = JSON.parse(json_str)
puts ruby_obj["city"]What is the output of this Ruby code?
medium📝 Predict Output Q13 of 15
Step-by-Step Solution
Solution:
Step 1: Parse JSON string into Ruby hash
The string{"age":30,"city":"NY"}is parsed into a Ruby hash with keys "age" and "city".Step 2: Access the value for key "city"
Usingruby_obj["city"]returns the string "NY".Final Answer:
NY -> Option DQuick Check:
JSON.parse + key access = value [OK]
Quick Trick: Parse JSON then access keys like a hash [OK]
Common Mistakes:
- Expecting numeric output instead of string
- Using symbol keys instead of string keys
- Forgetting to require 'json'
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