Given a hash scores = { alice: 90, bob: 75, carol: 85, dave: 60 }, how can you use reject to create a new hash excluding entries with scores less than 80?

hard📝 Application Q8 of 15

Ruby - Enumerable and Collection Processing

Given a hash scores = { alice: 90, bob: 75, carol: 85, dave: 60 }, how can you use reject to create a new hash excluding entries with scores less than 80?

Ascores.reject { |name, score| score < 80 }

Bscores.reject { |name| name < 80 }

Cscores.reject { |score| score < 80 }

Dscores.reject(&:score < 80)

Step-by-Step Solution

Solution:

Step 1: Understand hash reject block parameters
Reject block receives two parameters: key and value (name and score).
Step 2: Use correct condition on score
We want to reject entries where score is less than 80, so condition is score < 80.
Final Answer:
scores.reject { |name, score| score < 80 } -> Option A
Quick Check:
reject hash entries by value condition [OK]

Quick Trick: Hash reject block takes |key, value| parameters [OK]

Common Mistakes:

Using only one block parameter for hash
Trying to use symbol-to-proc with condition
Applying condition to key instead of value

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More Ruby Quizzes

Given a hash scores = { alice: 90, bob: 75, carol: 85, dave: 60 }, how can you use reject to create a new hash excluding entries with scores less than 80?

Step 1: Understand hash reject block parameters

Step 2: Use correct condition on score

Final Answer:

Quick Check:

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