return arr.filter(function(element) { if (element == 1) { return false } if (element == 2) { return true } for (var i = 2; i < element / 2 + 1; i++) { if (element % i == 0) { return false } } return true });
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杨子皓CDU
return arr.filter(function(element) { if (element == 1) { return false } if (element == 2) { return true } for (var i = 2; i < element / 2 + 1; i++) { if (element % i == 0) { return false } } return true });