The code is reduced from a map that needs to hold both correspondences
(ith to jth and jth to ith). But thanks for the point, it does apply to
the simplified case.
Andrei
Steve Schveighoffer wrote:
Fixed version:
import std.math, std.stdio;
void main() {
auto a = [ 4, 4, 2, 3, 2 ];
float avgdist = 0;
uint count;
foreach (i, e1; a[0 .. $-1]) {
foreach (j, e2; a[i+1 .. $]) {
if (e1 != e2) continue;
count++;
avgdist += j+1;
}
}
writeln(count, " ", avgdist / count);
}
:) I'm sure that's not what you were asking though...
-Steve
----- Original Message ----
From: Andrei Alexandrescu <[email protected]>
To: Discuss the phobos library for D <[email protected]>
Sent: Wed, January 20, 2010 11:50:20 PM
Subject: [phobos] [Fwd: "Unsigned-related bugs never occur in real code."]
Is there anything we can do about this?
Andrei
-------- Original Message --------
Subject: "Unsigned-related bugs never occur in real code."
Date: Wed, 20 Jan 2010 20:42:50 -0800
From: Andrei Alexandrescu
Organization: Digital Mars
Newsgroups: digitalmars.D
"It's an academic problem. Don't worry about it and move on."
That's what Walter kept on telling me. Yet I've spent the better part of
an hour reducing a bug down to the following:
import std.math, std.stdio;
void main() {
auto a = [ 4, 4, 2, 3, 2 ];
float avgdist = 0;
uint count;
foreach (i, e1; a) {
foreach (j, e2; a) {
if (i == j) continue;
if (e1 != e2) continue;
++count;
avgdist += abs(i - j);
}
}
writeln(count, " ", avgdist / count);
}
May this post be an innocent victim of the war against unsigned-related
bugs.
Andrei
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