how to get the \uxxxx unicode code from a char

[ketmar via Digitalmars-d-learn]

On Tue, 14 Oct 2014 19:46:57 +0000
jicman via Digitalmars-d-learn <digitalmars-d-learn at puremagic.com>
wrote:

> char[] s = "ABCabc";
> foreach (char c; s)
> {
>    // how do I convert c to something an Unicode code? ie. \u9999.
> 
> }
  string res;
  foreach (dchar ch; s) res ~= "\\u%04X".format(ch);
  // here we have the result in res

note "dchar" instead of "char". with "dchar" foreach() does utf-8
decoding (as 's' is in utf-8).
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