[Solved] Given an array of hashes representing products with keys ... Given an array of hashes representing products with keys :name and :price, how can you use inject to find the total price of all products? | Ruby

Ruby - Enumerable and Collection Processing

Given an array of hashes representing products with keys :name and :price, how can you use inject to find the total price of all products?

products = [
  { name: "Book", price: 12 },
  { name: "Pen", price: 3 },
  { name: "Notebook", price: 7 }
]

Aproducts.inject { |total, product| total + product.name }

Bproducts.inject(1) { |total, product| total * product[:price] }

Cproducts.inject(0) { |total, product| total + product[:price] }

Dproducts.inject(0) { |total, product| total + product.price }

Step-by-Step Solution

Solution:

Step 1: Access the price key correctly
Each product is a hash, so access price with product[:price].
Step 2: Sum prices starting at 0
Start with 0 and add each price to get total price.
Step 3: Check other options
products.inject { |total, product| total + product.name } uses dot notation which is invalid for hashes, C multiplies prices, D uses dot notation again.
Final Answer:
products.inject(0) { |total, product| total + product[:price] } -> Option C
Quick Check:
Sum prices with inject and hash keys = B [OK]

Quick Trick: Use hash keys with [:key] inside inject block [OK]

Common Mistakes:

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Given an array of hashes representing products with keys :name and :price, how can you use inject to find the total price of all products?