Trying to understand code that locates a unique number.
let counts = {};
for(let i = 0; i < arr.length; i++) {
if(counts[arr[i]] === undefined) {
counts[arr[i]] = 1;
} else {
counts[arr[i]] += 1;
}
}
let counts = {};
This line creates an empty object named counts. In JavaScri...
1x55.hashnode.dev2 min read