Add static .random(in:) method (#9)

Co-authored-by: Sindre Sorhus <[email protected]>
sindresorhus · Jul 6, 2020 · ac33f86 · ac33f86
1 parent 02d818c
commit ac33f86
Showing 1 changed file with 12 additions and 0 deletions.
diff --git a/Sources/Percentage/Percentage.swift b/Sources/Percentage/Percentage.swift
@@ -106,6 +106,18 @@ public struct Percentage: Hashable, Codable {
 	```
 	*/
 	public func of(_ value: Double) -> Double { value * rawValue / 100 }
+
+	/**
+	Returns a random value within the given range.
+
+	```
+	Percent.random(in: 10%...20%)
+	//=> Can be 10%, 11%, 12%, 19.98%, etc.
+	```
+	*/
+	public static func random(in range: ClosedRange<Self>) -> Self {
+		self.init(fraction: .random(in: range.lowerBound.fraction...range.upperBound.fraction))
+	}
 }
 
 extension Percentage: RawRepresentable {