/*
Compare two float arrays element-by-element using a tolerance.
Floating‑point values often differ slightly due to rounding,
so two numbers are considered "equal" when their absolute
difference is below the chosen threshold.
*/
import Foundation
/// Compares two float arrays and returns true if all elements match within tolerance.
func compareFloatArrays(_ a: [Float], _ b: [Float], tolerance: Float) -> Bool {
// If lengths differ, arrays cannot be equal
guard a.count == b.count else { return false }
// Compare each element using absolute difference
for i in a.indices {
let diff: Float = abs(a[i] - b[i])
// If any element differs more than tolerance, arrays are not equal
if diff > tolerance {
return false
}
}
// All elements matched within tolerance
return true
}
/// Prints the comparison result.
func printComparison(_ result: Bool) {
if result {
print("Arrays are equal within tolerance.")
} else {
print("Arrays differ.")
}
}
func main() {
// Example arrays
let floatArr1: [Float] = [
12314.9872,
3.14,
12387.91371,
8876.579013
]
let floatArr2: [Float] = [
12314.9872,
3.14,
12387.91372,
8876.579013
]
// Tolerance chosen for comparison
let tolerance: Float = 0.001
// Perform comparison
// Note: function parameters are (_ a: [Float], _ b: [Float], tolerance: Float)
let result: Bool = compareFloatArrays(floatArr1, floatArr2, tolerance: tolerance)
// Output result
printComparison(result)
}
main()
/*
run:
Arrays are equal within tolerance.
*/
