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The JavaScript Interview Handbook: 100+ Interview Questions

Solution Review: Purify the Function

Explore the concept of pure functions in JavaScript by examining why certain functions are impure due to side effects like console output. Learn how to identify and remove these side effects to create pure, predictable functions. This lesson helps you understand functional programming principles vital for writing clean code and passing technical interviews.

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Solution review #

Javascript (babel-node)
const addAndPrint = (a, b) => { 
  const sum = a+b;
  return sum;
};

Explanation #

The solution to this ...