On Sunday, 1 December 2013 at 08:22:41 UTC, Ali Çehreli wrote:
On 11/30/2013 05:53 PM, bioinfornatics wrote:
> I write a function with Lambda expression + safe + pure wich
do same
> (close) as countUntil
>
> http://www.dpaste.dzfl.pl/63d03540
>
> but i fail to use lambda expression into my function. I try
by two way
> - alias this pred … (to get a default lambda)
> - function(…) pred
>
> both way i fail, could you take a look to code please.
>
> Goal is to get a pure and safe function
>
> thanks
The obvious problem in the code is the fact that although the
intent and the lambda expression itself is written to take two
parameters, the lambda is called without any arguments:
1) The default lambda takes two parameters:
auto search( alias pred = (a,b) => a == b, R,T,S=T)( const
ref R toSearch, in T toMatch ) pure
2) and the provided lambda takes two parameters:
assert( arrStruct.search!( (a,b) => a.id == b )( 8uL ) == 7 );
3) However, the call itself takes no arguments:
if( pred() ){
So, I would start with that call to debug and pass the two
arguments that are appropriate (toSearch.front and toMatch,
perhaps?)
Ali
Thanks Ali,
that works now, i was close. http://www.dpaste.dzfl.pl/63d03540
