• =?UTF-8?B?Tm9yZGzDtnc=?= (2/2) Apr 26 2016 How do I lazily generate a sequence of random instances of type
• =?UTF-8?B?Tm9yZGzDtnc=?= (6/8) Apr 26 2016 Ahh, I found it:
• Seb (5/14) Apr 26 2016 Btw if you do random generation at the moment, you should always
• =?UTF-8?B?Tm9yZGzDtnc=?= (2/5) Apr 26 2016 So should I pass it by ref or const ref then?
• =?UTF-8?B?Tm9yZGzDtnc=?= (2/7) Apr 26 2016 Doh. Const ref is of no use... just by ref then, right?
• Seb (5/10) Apr 26 2016 I guess both work fine, but this was just a warning for other

=?UTF-8?B?Tm9yZGzDtnc=?= <per.nordlow gmail.com> writes:

How do I lazily generate a sequence of random instances of type 
`T` as an `InputRange`?

=?UTF-8?B?Tm9yZGzDtnc=?= <per.nordlow gmail.com> writes:

On Tuesday, 26 April 2016 at 10:31:22 UTC, Nordlöw wrote:
 How do I lazily generate a sequence of random instances of type 
 `T` as an `InputRange`?

Ahh, I found it:

         import std.range : generate, take;
         import std.random : uniform;
         auto randomSamples = generate!(() => uniform!Key).take(n);

I should have guessed that...

Seb <seb wilzba.ch> writes:

On Tuesday, 26 April 2016 at 10:50:27 UTC, Nordlöw wrote:
 On Tuesday, 26 April 2016 at 10:31:22 UTC, Nordlöw wrote:
 How do I lazily generate a sequence of random instances of 
 type `T` as an `InputRange`?

 Ahh, I found it:

         import std.range : generate, take;
         import std.random : uniform;
         auto randomSamples = generate!(() => 
 uniform!Key).take(n);

 I should have guessed that...

Btw if you do random generation at the moment, you should always 
be aware that it's super-easy to do an implicit copy if you pass 
around the rndGen, see:

http://dconf.org/2015/talks/wakeling.html

=?UTF-8?B?Tm9yZGzDtnc=?= <per.nordlow gmail.com> writes:

On Tuesday, 26 April 2016 at 11:09:42 UTC, Seb wrote:
 Btw if you do random generation at the moment, you should 
 always be aware that it's super-easy to do an implicit copy if 
 you pass around the rndGen

So should I pass it by ref or const ref then?

=?UTF-8?B?Tm9yZGzDtnc=?= <per.nordlow gmail.com> writes:

On Tuesday, 26 April 2016 at 17:38:33 UTC, Nordlöw wrote:
 On Tuesday, 26 April 2016 at 11:09:42 UTC, Seb wrote:
 Btw if you do random generation at the moment, you should 
 always be aware that it's super-easy to do an implicit copy if 
 you pass around the rndGen

 So should I pass it by ref or const ref then?

Doh. Const ref is of no use... just by ref then, right?

Seb <seb wilzba.ch> writes:

On Tuesday, 26 April 2016 at 17:38:33 UTC, Nordlöw wrote:
 On Tuesday, 26 April 2016 at 11:09:42 UTC, Seb wrote:
 Btw if you do random generation at the moment, you should 
 always be aware that it's super-easy to do an implicit copy if 
 you pass around the rndGen

 So should I pass it by ref or const ref then?

I guess both work fine, but this was just a warning for other 
case.
The example that  WebDrake mentioned on his slides can happen too 
easily - a reason why we should fix it (which is on my agenda).