var arr=[1,1,2,2,4,5,6,7,8]
for(var i=0;i<arr.length;i++){
fof(var j=i+1;j<arr.length;j++){
if(arr[j]==arr[i]){
arr.splice(j,1);
}
}
}
console.log(arr[i]);
var arr=[1,1,2,2,4,5,6,7,8]
for(var i=0;i<arr.length;i++){
fof(var j=i+1;j<arr.length;j++){
if(arr[j]==arr[i]){
arr.splice(j,1);
}
}
}
console.log(arr[i]);