• ixid (22/22) Jan 28 2016 This is an idle thought hence putting it on the Learn-level
• =?UTF-8?Q?Ali_=c3=87ehreli?= (7/14) Jan 28 2016 It looks like Solomon E's recent collapse() is what we need here:
• ixid (9/30) Jan 28 2016 That's a much more limited version of what I'm suggesting in that

ixid <nuaccount gmail.com> writes:

This is an idle thought hence putting it on the Learn-level 
forum. An idea struck me for foreach to make working with more 
complicated data types or heavily nested data easier.


	uint[][] a = [[1,2,3],[4,5,6]];

	foreach(uint[] b; a)
		b.writeln;
	

At present you can specify the type of 'b' in this example. If 
you want to iterate over each uint you have to write (and 
obviously you can omit the type for 'b' and 'c'):

	
	foreach(uint[] b; a)
		foreach(uint c; b)
			c.writeln;
	
It would be nice if you could do something like this:

	foreach(uint c; a)
		c.writeln;

Where it will take the ForeachType of 'a' until it finds a match 
to the type of 'c' and iterate over all that data. It would make 
it much less messy to apply a function that takes uint to all the 
data rather than having to nest loops or map maps.

=?UTF-8?Q?Ali_=c3=87ehreli?= <acehreli yahoo.com> writes:

On 01/28/2016 05:33 AM, ixid wrote:
 This is an idle thought hence putting it on the Learn-level forum. An
 idea struck me for foreach to make working with more complicated data
 types or heavily nested data easier.


      uint[][] a = [[1,2,3],[4,5,6]];

[...]

 It would be nice if you could do something like this:

      foreach(uint c; a)
          c.writeln;

It looks like Solomon E's recent collapse() is what we need here:

   http://forum.dlang.org/post/xihlsfgfpykdvmvrggyr forum.dlang.org

     foreach(c; a.collapse)
         // ...

Ali

ixid <nuaccount gmail.com> writes:

On Thursday, 28 January 2016 at 15:38:20 UTC, Ali Çehreli wrote:
 On 01/28/2016 05:33 AM, ixid wrote:
 This is an idle thought hence putting it on the Learn-level

 forum. An
 idea struck me for foreach to make working with more

 complicated data
 types or heavily nested data easier.


      uint[][] a = [[1,2,3],[4,5,6]];

 [...]

 It would be nice if you could do something like this:

      foreach(uint c; a)
          c.writeln;

 It looks like Solomon E's recent collapse() is what we need 
 here:

   
 http://forum.dlang.org/post/xihlsfgfpykdvmvrggyr forum.dlang.org

     foreach(c; a.collapse)
         // ...

 Ali

That's a much more limited version of what I'm suggesting in that 
it just collapses until something isn't an array any more, 
sometimes you might only want to collapse two levels and get up 
with something that's still an array type or you will be getting 
members in struct that's in an array.

I've written something similar for myself that will collapse 
until a provided type is matched or the first argument type of a 
provided function is matched and apply the function.