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transform_values

⚙️ Transforming Values with transform_values​

Ruby's Hash#transform_values lets you apply a block to each value and return a new hash with the same keys. This is ideal for normalizing, casting, or formatting all values at once.

prices = { apple: "1.20", banana: "0.50" }
# Convert string prices to floats
float_prices = prices.transform_values { |v| v.to_f }
# => { apple: 1.2, banana: 0.5 }

# Increase all prices by 10%
increased = float_prices.transform_values { |v| (v * 1.1).round(2) }
# => { apple: 1.32, banana: 0.55 }