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Map vs forEach: Understanding the Core Difference for JavaScript Developers

  • JavaScript developers often encounter the dilemma of choosing between map() and forEach() methods when iterating over arrays.
  • forEach() is used for executing side effects and does not return anything, while map() is used for transforming data and returns a new array.
  • forEach() is suitable for tasks like logging or updating external variables, while map() is perfect for data transformation without mutating the original array.
  • Understanding the differences between map() and forEach() helps in writing cleaner and more efficient JavaScript code.

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