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Discussion on: 1 line of code: How to clean an Array

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Replies for: Interesting is that all these filtered can be coerced to false, and only the number 0 and false can, too. That would simplify the filter to: arr...

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Jon Randy 🎖️ • • Edited

Why not just this?

arr.filter(i=>i)
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Alex Lohr •

Because it was explicitly stated that false and 0 should not be filtered. Your code would filter them.

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Jon Randy 🎖️ • • Edited

Ah, I misread - you want to keep 0 and false. In which case, you can shorten to:

arr.filter(item => item || item === 0 || item === false)
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The !! is unnecessary.