On Fri, 25 Jan 2013, Sven Barth wrote:
On 25.01.2013 17:18, Alexander Klenin wrote:
With this in mind, consider a user who wants to iterate over the
following array:
var
a: array [1..5] of Integer = (1, 2, 9, 4, 5);
In my proposal, he should write:
var
v, i: Integer;
begin
for a in a index i do
Writeln(i, ' ', v);
end.
In your proposal, he should write (suppose GIter is a unit
implementing the generic array iterator):
uses
GIter;
type
TArrayIntIterator = specialize TArrayIterator<Integer>;
i: TArrayIntIterator.TElem;
begin
for i in TArrayIntIterator.Create(a) do
Writeln(i.Index + Low(a), ' ', i.Value);
end.
One could also do an alternative (though currently not with arrays, but with
type helper support even that would be possible...):
Talk about a choice between the plague and cholera...
If I must choose between the proposed extension of for in index do
and having anonymous functions, then I choose for for in index :)
(and most likely ending up with both monstrosities)
Pascal is an explicitly declarative language.
Anonymous functions go 100% against this.
It is the readability horror I associate with Javascript.
I often wonder: why do people who seem to think that Pascal misses
so many - apparently essential - things, even bother to use it ?
If I thought Pascal was missing so many things, I would simply
use something else instead of trying to turn it into something
that it is not.
Michael.
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