Function to print a diamond shape

[Vladimir Panteleev]

On Friday, 21 March 2014 at 12:32:58 UTC, Sergei Nosov wrote:
> On Thursday, 20 March 2014 at 21:25:03 UTC, Ali Çehreli wrote:
>> This is a somewhat common little exercise: Write a function 
>> that takes the size of a diamond and produces a diamond of 
>> that size.
>>
>> When printed, here is the output for size 11:
>>
>>     *
>>    ***
>>   *****
>>  *******
>> *********
>> ***********
>> *********
>>  *******
>>   *****
>>    ***
>>     *
>>
>> What interesting, boring, efficient, slow, etc. ways are there?
>>
>> Ali
>
> Probably, the most boring way is
>
> foreach(i; 0..N)
> {
>     foreach(j; 0..N)
>         write(" *"[i + j >= N/2 && i + j < 3*N/2 && i - j <= 
> N/2 && j - i <= N/2]);

write(" *"[abs(i-N/2) + abs(j-N/2) <= N/2]);

>     writeln;
> }