filter

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filter keeps items where the callback returns true.

What does filter return?

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const xs=[1,2,3,4];
console.log(xs.filter(x=>x%2===0).join(','));

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const xs=[1,2,3,4];
console.log(xs.filter(x=>x%2===0).join(','));

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const xs=[1,2,3,4];
console.log(xs.filter(x=>x%2===0).join(','));

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