NaN or Not a Number?
Read OriginalThis technical blog post delves into JavaScript's NaN (Not a Number) value. It explains what NaN is, how it arises from impossible math operations, and its surprising classification as a 'number' type. The article contrasts the global isNaN() function with Number.isNaN(), demonstrating their different coercion behaviors through code examples. Finally, it discusses practical implications for filtering arrays to ensure only valid numbers are retained, highlighting common pitfalls.
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