If you hate the double loop you can avoid the map like this:
arr.reduce( (result, num) => (result[0] > num) ? result : (result[0] ==num) ? [result[0], result[1]+1] : [num,1], (arr[0],0))
This does it all in one pass.
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If you hate the double loop you can avoid the map like this:
This does it all in one pass.