Digression: Value vs. Reference Parameters

• Value parameters (Object foo)

  • copies parameter
  • no side effects

• Reference parameters (Object & foo)

  • shares parameter
  • can affect actual value
  • use when the value needs to be changed

• Const reference parameters (const Object & foo)

  • shares parameter
  • cannot affect actual value
  • use when the value is too intricate for pass-by-value

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