Re: md5 return toHexString

[tcak via Digitalmars-d-learn]

On Friday, 24 April 2015 at 17:50:03 UTC, AndyC wrote:
Hi All, I cannot seem to understand whats wrong with this:
// main.d
import std.stdio;
import std.digest.md;
import std.file;


string md5sum(const string fname)
{
    MD5 hash;

    File f = File(fname, "rb");
    foreach( ubyte[] buf; f.byChunk(4096))
    {
        hash.put(buf);
    }

    string s = toHexString!(LetterCase.lower)(hash.finish());
    writeln(s);   //This is correct
    return s;
}

void main()
{
    string crc = md5sum("main.d");
    writeln(crc);  //This is garbage
}


The writeln in md5sum prints correctly, but the "return s" 
seems to mess it up?  What's going on?

Thanks for you time,

-Andy

Just do that "return s.dup()". Then it works for me. That's 
probably due to the fact that s is in stack. But I am not sure 
how "toHexString" works.