Ruby - Advanced Metaprogramming
In Ruby DSL building, what happens if you define multiple keys with the same name in a hash inside the DSL block?
In Ruby DSL building, what happens if you define multiple keys with the same name in a hash inside the DSL block?
hard📝 Conceptual Q10 of 15
Step-by-Step Solution
Solution:
Step 1: Recall Ruby hash behavior
Ruby hashes overwrite earlier values when duplicate keys are assigned.Step 2: Apply to DSL context
DSL hashes behave the same; last key-value pair wins silently.Final Answer:
The last key-value pair overwrites previous ones -> Option DQuick Check:
Duplicate hash keys overwrite previous values [OK]
Quick Trick: Duplicate keys in hashes overwrite earlier entries silently [OK]
Common Mistakes:
- Expecting error on duplicate keys
- Assuming values accumulate automatically
- Thinking first key is preserved
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