Given a hash scores = { alice: 85, bob: 42, carol: 75, dave: 30 }, how do you select only the key-value pairs where the value is greater than 50?

hard📝 Application Q8 of 15

Ruby - Enumerable and Collection Processing

Given a hash scores = { alice: 85, bob: 42, carol: 75, dave: 30 }, how do you select only the key-value pairs where the value is greater than 50?

Ascores.select { |k, v| v > 50 }

Bscores.filter { |k| k > 50 }

Cscores.select { |v| v > 50 }

Dscores.map { |k, v| v > 50 }

Step-by-Step Solution

Solution:

Step 1: Understand filtering a hash with select
When filtering a hash, select takes two block variables: key and value.
Step 2: Use correct block variables and condition
scores.select { |k, v| v > 50 } correctly uses { |k, v| v > 50 } to filter pairs with values greater than 50.
Final Answer:
scores.select { |k, v| v > 50 } -> Option A
Quick Check:
Use two block variables for hash select [OK]

Quick Trick: Use |key, value| to filter hashes with select [OK]

Common Mistakes:

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