grouping(_:)
Modifies the format style to use the specified grouping.
Declaration
func grouping(_ group: FloatingPointFormatStyle<Value>.Configuration.Grouping) -> FloatingPointFormatStyle<Value>Parameters
- group:
The grouping to apply to the format style.
Return Value
A floating-point format style modified to use the specified grouping.
Discussion
The following example creates a default FloatingPointFormatStyle for the en_US locale, and a second style that never uses grouping. It then applies each style to an array of floating-point values. The formatting that the the modified style applies eliminates the three-digit grouping usually performed for the en_US locale.
let defaultStyle = FloatingPointFormatStyle<Double>(locale: Locale(identifier: "en_US"))
let neverStyle = defaultStyle.grouping(.never)
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 neverNums = nums.map { neverStyle.format($0) } // ["100.1", "1000.2", "10000.3", "100000.4", "1000000.5"]