Swift CodeUnit to String

Question

As stated in Apple Docs:

An arbitrary Unicode scalar, written as \u{n}, where n is a 1–8 digit hexadecimal number with a value equal to a valid Unicode code point

let dollarSign = "\u{24}" // $, Unicode scalar U+0024

my question is if I have the hexadecimal digit how could I turn it into string. So if I have the following :

let dollarSignHex = 24

How can I map it to let dollarSignString = ????

Martin R · Accepted Answer · 2015-11-12 08:47:54Z

3

24 is a decimal integer constant. If you want the Unicode code point with the hexadecimal number 24 then you have to start with

let dollarCode = 0x24

or

let dollarCode = 36

Then you can create a string from that integer value with

let dollarSignString = String(UnicodeScalar(dollarCode)) // $

Alternatively, start with a string containing the hexadecimal representation of the code point, and convert that to a number and then to a string:

let dollarSignHex = "24"
let dollarCode = UInt32(dollarSignHex, radix: 16)! // 36
let dollarSignString = String(UnicodeScalar(dollarCode)) // $

answered Nov 12, 2015 at 8:47

Martin R

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