ArrayInfo

Extends Swift ArraySlice and Sequence with

info(_ options:ArrayInfo.Options = []) -> ArrayInfo<Element>

for Element types conforming to BinaryInteger&Codable and BinaryFloatingPoint&Codable.

Concrete type ArrayInfo contains trivial/statistical information about array/sequence and it's elements.

import ArrayInfo

let array = [1,2,4,8,16]
var info = array.info(.histogram)
print(info) // ArrayInfo<Int>(issues: Set([]), count: 5, isEmpty: false, sum: Optional(31.0), exactSum: Optional(31), _exactSumOverflow: false, _elementOverflow: false, allElementsEqual: false, avg: Optional(6.2), minValue: Optional(1), maxValue: Optional(16), minValueIndex: Optional(0), maxValueIndex: Optional(4), exactMinDelta: Optional(1), exactMaxDelta: Optional(8), minDelta: Optional(1.0), maxDelta: Optional(8.0), avgDelta: Optional(3.75), exactSumDelta: Optional(15), sumDelta: Optional(15.0), _exactSumDeltaOverflow: false, _exactMinMaxDeltaOverflow: false, isAscending: true, isStrictlyAscending: true, isDescending: false, isStrictlyDescending: false, hasConstantExactDelta: false, constantExactDelta: nil, median: Optional(4.0), histogram: Optional([4: 1, 8: 1, 2: 1, 16: 1, 1: 1]), mode: nil)

print(array[3...].info().sum) // Optional(24)
print(array.reversed().info().isAscending) // false

Performance

O(n), all information is collected on a single pass through the elements.