function mergeArrays(arr1, arr2) { let commonArray = arr1.concat(arr2); let sortComArr = commonArray.sort((a, b) => a - b); let result = sortComArr.filter((current, i) => { return sortComArr.indexOf(current) === i; }) return result } console.log(mergeArrays([1, 1, 3, 5, 7, 9], [10, 8, 6, 4, 2]))
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