The following code will give difference results with macOS and Linux.
let formatter = NumberFormatter()
formatter.negativeFormat = "#.#########"
formatter.positiveFormat = "#.#########"
var a = 0.5
print(formatter.string(from: NSNumber(value: a)))
masters3d
(Chéyo Jiménez)
2
Can you share the results and versions? Also looks like a bug repot?
1 Like
I got follow results
macOS, swift 5
output: 0.5
Docker swift:4.1
output: 0
Docker vapor/swift:5.0
output: 0
I donât know is it a bug. The status page of Foundation lib just say NumberFormatter is âMostly Completeâ. I put my code on server and found that the formatter round all the NSNumber to integer.
Martin
(Martin R)
4
From the implementation at NumberFormatter.swift is seems that the negativeFormat and positiveFormat are not actually implemented. They set private properties which are otherwise unused. Therefore your formatter behaves (on non-Apple platforms) as if no number format was set at all.
You probably have to control the output format with other properties, for example:
let formatter = NumberFormatter()
formatter.minimumFractionDigits = 4
var a = 0.5
print(formatter.string(from: NSNumber(value: a)))
// Optional("0.5000")
I have workaround by converting Double to Decimal and print Decimal out. This works perfectly.
If you donât mind, filing a bug at https://bugs.swift.org would be much appreciated
1 Like
