Array - Check Duplicates
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function checkArrayDuplicates(num){
let mySet = new Set();
let output=false;
num.forEach(n =>{
if(mySet.has(n)){
output=true;
return;
}else{
mySet.add(n);
}
});
console.log(output);
}
checkArrayDuplicates([1,1,3,4,4]);
JavaScript
INFO