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Add equality minus epsilon comparison for Doubles #21

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Merged
merged 1 commit into from
Dec 2, 2024
Merged

Add equality minus epsilon comparison for Doubles #21

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11 changes: 4 additions & 7 deletions Sources/Number/Float+NYPLAdditions.swift → Sources/Number/Double+NYPLAdditions.swift
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Original file line number Diff line number Diff line change
@@ -1,26 +1,23 @@
//
// StdLib+NYPLAdditions.swift
// Simplified
//
// Created by Ettore Pasquini on 6/17/20.
// Copyright © 2020 NYPL. All rights reserved.
// Copyright © 2024 The New York Public Library. All Rights Reserved.
//

import Foundation

infix operator =~= : ComparisonPrecedence

public extension Float {
public extension Double {

/// Performs equality check minus an epsilon
/// - Returns: `true` if the numbers differ by less than the epsilon,
/// `false` otherwise.
static func =~= (a: Float, b: Float?) -> Bool {
static func =~= (a: Double, b: Double?) -> Bool {
guard let b = b else {
return false
}

return abs(a - b) < Float.ulpOfOne
return abs(a - b) < Double.ulpOfOne
}

func roundTo(decimalPlaces: Int) -> String {
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