if(arr) {
return arr.filter(function (element){
var count=-1;
for(var i=1;i<element;i++) {
if(element%i === 0) {
count = count + 1;
} else {
count = count;
}
return !count;
});
return 0;
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困
if(arr) {
return arr.filter(function (element){
var count=-1;
for(var i=1;i<element;i++) {
if(element%i === 0) {
count = count + 1;
} else {
count = count;
}
}
return !count;
});
} else {
return 0;
}