Answers for "find first element repeating k times javascript"

5

items from first array that are not in the second array javascript

let difference = arrA.filter(x => !arrB.includes(x));
Posted by: Guest on September-24-2020
1

first duplicate javascript

function firstDuplicate(a) {
    let data = [];
    
    for (dup of a) {
        if (data[dup]) {
            return dup
        } else {
            data[dup] = dup
        }
    }
    return -1
}
Posted by: Guest on October-25-2020

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