On Tuesday, 19 August 2014 at 00:55:24 UTC, Idan Arye wrote:
On Tuesday, 19 August 2014 at 00:54:25 UTC, Idan Arye wrote:
On Monday, 18 August 2014 at 21:17:11 UTC, Jonathan M Davis
wrote:
On Monday, 18 August 2014 at 21:02:09 UTC, Gary Willoughby
wrote:
In the new D release there have been some changes regarding
built-in types.
http://dlang.org/changelog.html?2.066#array_and_aa_changes
I would like to learn why this has been done like this and
why it is desired to be free functions rather than
properties?
Probably because they never should have been properties in
the first place. Properties are supposed to emulate
variables, whereas something like dup is clearly an action.
So, it's clearly not supposed to be a property. However,
because D doesn't require parens on a function with no
arguments, you can still call it without parens. Some of the
changes probably also help with cleaning up the AA internals,
which is sorely needed.
- Jonathan M Davis
Also std.algorithm's heavy usage of passing delegates as
template arguments makes it more elegant to use free functions:
import std.algorithm;
import std.compiler;
void main()
{
int[][] arr=[[1,2],[3,4]];
static if (version_minor<=65){
auto arr2=arr.map!(a => a.dup)();
}else{
auto arr2=arr.map!(a.dup)();
}
arr2[0][0]=9;
assert(arr2[0][0] == 1);
}
Sorry - that should have been:
import std.algorithm;
import std.compiler;
void main()
{
int[][] arr=[[1,2],[3,4]];
static if (version_minor<=65){
auto arr2=arr.map!(a => a.dup)();
}else{
auto arr2=arr.map!(dup)();
}
arr2[0][0]=9;
assert(arr2[0][0] == 1);
}
This kind of makes sense for `dup` because that could be applied
across types but what about rehash, byKey, byValue, keys, values,
etc of AA's? Surely these will only be used by AA's? Is this more
about speed optimisation?
