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- var A = [3 ,4 ,1 ,4 ,1];
- let h = {}
- for(let i =0;i<=A.length-1;i++){
- if(h[A[i]]!=null){
- h[A[i]]+=1
- }
- else{
- h[A[i]]=1
- }
- }
- for (var key in h) {
- if(h[key]>1){
- console.log(key)
- }
- }
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