24 lines
745 B
Text
24 lines
745 B
Text
let median = (arr) =>
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{
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let float_compare = (a, b) => {
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let diff = a -. b
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if diff == 0.0 { 0 } else
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if diff > 0.0 { 1 } else { -1 }
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}
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let _ = Js.Array2.sortInPlaceWith(arr, float_compare)
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let count = Js.Array.length(arr)
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// find the middle value, or the lowest middle value
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let middleval = ((count - 1) / 2)
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let median =
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if (mod(count, 2) != 0) { // odd number, middle is the median
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arr[middleval]
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} else { // even number, calculate avg of 2 medians
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let low = arr[middleval]
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let high = arr[middleval+1]
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((low +. high) /. 2.0)
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}
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median
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}
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Js.log(median([4.1, 5.6, 7.2, 1.7, 9.3, 4.4, 3.2]))
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Js.log(median([4.1, 7.2, 1.7, 9.3, 4.4, 3.2]))
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