In my case I have string with coma.
var stringWithComa = "1,2"
When I try to convert it to Float or Double I receive nil as expected.
Float(stringWithComa)//nil
Double(stringWithComa)//nil
But when I do Decimal(string: stringWithComa) I receive 1.
Why this issue is happening ?
Use Decimal(string:locale:) to parse a string containing a localized
number. Example:
print(Locale.current.decimalSeparator!) // ","
let stringWithComma = "1,2"
if let dec = Decimal(string: stringWithComma, locale: .current) {
print(dec) // 1.2
}
Otherwise the comma is considered as an invalid character.
Contrary to the Float and Double initializers, leading whitespace
and trailing “junk” is ignored. The conversion succeeds if at least
one valid character was found:
print(Decimal(string: " 1.23💣")) // Optional(1.23)
print(Decimal(string: "😈")) // nil
The Decimal(string: String) constructor in swift will keep on parsing the provided string. If It finds any invalid character which cannot be evaluated, it will stop parsing.
A few examples -
Decimal(string: "34234.43423.4343") => "34234.43423"
Decimal(string: "#343.43") => nil
Decimal(string:)just stops parsing as soon as an invalid character is found.Decimal(string: "1.23💣")returns1.23without exploding.Decimal(string: stringWithComma, locale: .current)