• Andrei Alexandrescu (3/3) Aug 06 2013 Vote up!
• bearophile (6/7) Aug 06 2013 It's an interesting article, but I wrote some comments. Not even
• =?UTF-8?B?QWxpIMOHZWhyZWxp?= (17/20) Aug 06 2013 This article is excellent.
• Jos van Uden (7/10) Aug 07 2013 If I understand it correctly "chunkBy" cannot accept a string lambda, du...
• Nick Sabalausky (4/8) Aug 09 2013 Great article. Even as an experienced D user, it really gave me a lot

Andrei Alexandrescu <SeeWebsiteForEmail erdani.org> writes:

Vote up!

http://www.reddit.com/r/programming/comments/1jtzez/component_prog
amming_with_ranges/ 


Andrei

"bearophile" <bearophileHUGS lycos.com> writes:

Andrei Alexandrescu:

 http://www.reddit.com/r/programming/comments/1jtzez/component_programming_with_ranges/

It's an interesting article, but I wrote some comments. Not even 
some answers before posting that to Reddit?

http://forum.dlang.org/thread/20130802052432.GA495 quickfur.ath.cx#post-ibbicmqochwtirxdbmud:40forum.dlang.org

Bye,
bearophile

=?UTF-8?B?QWxpIMOHZWhyZWxp?= <acehreli yahoo.com> writes:

On 08/06/2013 12:56 PM, Andrei Alexandrescu wrote:
 Vote up!

 http://www.reddit.com/r/programming/comments/1jtzez/component_programming_with_ranges/


 Andrei

This article is excellent.

Some notes:

1) More recent versions of std.datetime makes it possible to write 
1.days instead of dur!"days"(1)

From:

         .recurrence!((a,n) => a[n-1] + dur!"days"(1))

To:
         .recurrence!((a,n) => a[n-1] + 1.days)

2) It is mildly annoying that sometimes it is more convenient to do 
non-trivial processings in .front rather than .popFront. The problem of 
doing so is that the user of the code may call .front multiple times 
assuming that the result is a reference to an already processed data 
when in fact each call consumes CPU cycles.

3) I haven't compiled the code but it looks like some of the signature 
constraints can be simplified by taking advantage of isDateRange() more.

Ali

Jos van Uden <usenet fwend.com> writes:

On 6-8-2013 21:56, Andrei Alexandrescu wrote:
 Vote up!

 http://www.reddit.com/r/programming/comments/1jtzez/component_programming_with_ranges/

 Andrei

If I understand it correctly "chunkBy" cannot accept a string lambda, due to the
template constraint. Therefore the line

    alias attr = unaryFun!attrFun;

seems unnecessary to me.

By the way, when I try the code from github, it only prints the first 3 months.
DMD32 D Compiler v2.063 (win7 64)

Nick Sabalausky <SeeWebsiteToContactMe semitwist.com> writes:

On Tue, 6 Aug 2013 12:56:48 -0700
Andrei Alexandrescu <SeeWebsiteForEmail erdani.org> wrote:

 Vote up!
 
 http://www.reddit.com/r/programming/comments/1jtzez/component_prog
amming_with_ranges/ 
 

Great article. Even as an experienced D user, it really gave me a lot
to think about.