[Issue 5513] New: Erroneous example in std.algorithm

d-bugmail at puremagic.com d-bugmail at puremagic.com
Tue Feb 1 07:43:30 PST 2011


http://d.puremagic.com/issues/show_bug.cgi?id=5513

           Summary: Erroneous example in std.algorithm
           Product: D
           Version: D2
          Platform: Other
               URL: http://digitalmars.com/d/2.0/phobos/std_algorithm#schw
                    artzSort
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: websites
        AssignedTo: nobody at puremagic.com
        ReportedBy: simen.kjaras at gmail.com


--- Comment #0 from Simen Kjaeraas <simen.kjaras at gmail.com> 2011-02-01 07:41:15 PST ---
This examples is on the std.algorithm doc page:

uint hashFun(string) { ... expensive computation ... }
string[] array = ...;
// Sort strings by hash, slow
sort!("hashFun(a) < hashFun(b)")(array);
// Sort strings by hash, fast (only computes arr.length hashes):
schwartzSort!(hashFun, "a < b")(array);

As we all know, *naryFun can't access local symbols, so this example does not
compile.

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