On 08/03/2013 12:02 AM, H. S. Teoh wrote:
On Thu, Aug 01, 2013 at 10:49:00PM -0700, Walter Bright wrote:
On 8/1/2013 10:24 PM, H. S. Teoh wrote:
Once this last bit worked, though, everything fell into place quickly.
After all unittests were passing, no more bugs were found!! The program
can print beautifully laid out calendars with no problems whatsoever.
I'm so in love with D right now... If I'd done this exercise in C or
C++, I'd be spending the next 2 days debugging before I could present
the code for the world to see. D ranges and unittest blocks are t3h
k00l.
I think this is awesome, and this + your previous post are
sufficient to create a great article!
OK, here's a draft of the article:
http://wiki.dlang.org/User:Quickfur/Component_programming_with_ranges
It looks like I may have to sort out some issues with compiler bugs
before officially posting this article, though, since the code
apparently fails to compile with many versions of DMD. :-(
T
Also, you may want to replace some of the manually implemented ranges
where this makes sense.
Eg, datesInYear can be expressed more to the point as:
auto datesInYear(int year){
return Date(year,1,1).recurrence!((a,n)=>a[n-1]+1.dur!"days")
.until!(a=>a.year>year);
}
(This closes over year though. The following version uses only closed
lambdas by embedding year in the returned range object:
auto datesInYear(int year){
return Date(year,1,1)
.recurrence!((a,n)=>a[n-1]+1.dur!"days")
.zip(year.repeat)
.until!(a=>a[0].year>a[1]).map!(a=>a[0]);
})
