Given a hash prices = { apple: 2, banana: 1, orange: 3 }, how can you use inject to calculate the total price?

hard📝 Application Q8 of 15

Ruby - Enumerable and Collection Processing

Given a hash prices = { apple: 2, banana: 1, orange: 3 }, how can you use inject to calculate the total price?

Aprices.inject(0) { |sum, price| sum * price }

Bprices.inject { |sum, price| sum + price }

Cprices.inject(1) { |sum, (fruit, price)| sum + fruit }

Dprices.inject(0) { |sum, (_, price)| sum + price }

Step-by-Step Solution

Solution:

Step 1: Understand hash iteration with inject
Inject on hash yields key-value pairs as two-element arrays, so block parameters should unpack key and value.
Step 2: Sum only the values starting from 0
prices.inject(0) { |sum, (_, price)| sum + price } correctly unpacks key and price, sums prices starting at 0.
Final Answer:
prices.inject(0) { |sum, (_, price)| sum + price } -> Option D
Quick Check:
Sum hash values with inject by unpacking pairs [OK]

Quick Trick: Unpack key,value pairs in block to sum hash values [OK]

Common Mistakes:

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