- const sortedDataSet = dataSet.slice().sort((a, b) => a - b)
- const middleIndex = Math.floor(sortedDataSet.length / 2)
- if (sortedDataSet.length % 2 === 0) {
- return sortedDataSet[middleIndex / 2]
- }
- return (sortedDataSet[middleIndex - 1] + sortedDataSet[middleIndex]) / 2
+ dataSet = dataSet.slice().sort((a, b) => a - b)
+ return (dataSet[(dataSet.length - 1) >> 1] + dataSet[dataSet.length >> 1]) / 2