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练习

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狼叔叔

#1 Created at ... [Delete] [Delete and Lock User]
return arr.filter(function (el) {
if (el === 1) {
    return false;
} else {
    for (let i = 2; i < el; i++) {
            if (el % i === 0) {
            return false;
            };
        };
        return true;
}
});

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