scale(_:)
Modifies the format style to use the specified scale.
Declaration
func scale(_ multiplicand: Double) -> FloatingPointFormatStyle<Value>Parameters
- multiplicand:
The multiplicand to apply to the format style.
Return Value
A floating-point format style modified to use the specified scale.
Discussion
The following example creates a default FloatingPointFormatStyle for the en_US locale, and a second style that scales by a multiplicand of 0.001. It then applies each style to an array of floating-point values. The formatting that the modified style applies expresses each value in terms of one-thousandths.
let defaultStyle = FloatingPointFormatStyle<Double>(locale: Locale(identifier: "en_US"))
let scaledStyle = defaultStyle.scale(0.001)
let nums = [100.1, 1000.2, 10000.3, 100000.4, 1000000.5]
let defaultNums = nums.map { defaultStyle.format($0) } // ["100.1", "1,000.2", "10,000.3", "100,000.4", "1,000,000.5"]
let scaledNums = nums.map { scaledStyle.format($0) } // ["0.1001", "1.0002", "10.0003", "100.0004", "1,000.0005"]