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41 lines
1.1 KiB
JavaScript
41 lines
1.1 KiB
JavaScript
/*
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* Median: https://en.wikipedia.org/wiki/Median
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*
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* function averageMedian
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* to find the median value of an array of numbers
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* the numbers in an array will be sorted in ascending order by the function sortNumbers
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* if the length of the array is even number, the median value will be the average of the two middle numbers
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* else if the length of the array is odd number, the median value will be the middle number in the array
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*/
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/*
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* Doctests
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*
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* > averageMedian([8, 9, 1, 2, 5, 10, 11])
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* 8
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* > averageMedian([15, 18, 3, 9, 13, 5])
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* 11
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* > averageMedian([1,2,3,4,6,8])
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* 3.5
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*/
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function averageMedian(numbers) {
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let median = 0, numLength = numbers.length
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numbers = numbers.sort(sortNumbers)
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if (numLength % 2 === 0) {
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median = (numbers[numLength / 2 - 1] + numbers[numLength / 2]) / 2
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} else {
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median = numbers[(numLength - 1) / 2]
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}
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return median
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}
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function sortNumbers(num1, num2) {
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return num1 - num2
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}
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console.log(averageMedian([8, 9, 1, 2, 5, 10, 11]))
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console.log(averageMedian([15, 18, 3, 9, 13, 5]))
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console.log(averageMedian([1,2,3,4,6,8])) |