I'd like to try d in computational physics. One of the most
appealing features of the d is implementation of arrays, but to
be really usable this has to work FAST.
So here http://dlang.org/arrays.html it is stated, that:
"Implementation note: many of the more common vector
operations
On Wednesday, 21 March 2012 at 20:13:37 UTC, Jesse Phillips wrote:
Note, I commented out reduce as it uses the array type instead
of the calculation type. I think I'll file than as a bug. Also
the reduce version would not give you a double back even if it
did work, need a cast in there.
Neve
On Wednesday, 21 March 2012 at 17:02:05 UTC, Brian Brady wrote:
As per the commented section, I want to be able to dynamically
figure out,
which member of the struct to average across, for all the
structs in the array.
Timon has given you an good example to get D to generate some
code for yo
Thanks for the replies.
Timons reply answers my question ... now I just have to figure out how :P
David Nadlinger:
I don't think this will ever be supported (without using
opDispatch) – para is a runtime value here…
David
Right, right, sorry, I meant a compile time argument.
And even that, it's not clear what arr[].foo means. Maybe a lazy
Range of that field, that is a lazy column.
B
On Wednesday, 21 March 2012 at 18:11:11 UTC, bearophile wrote:
Brian Brady:
// but if I write x[].para if throws an error
This is a quite natural syntax, and I think it's handy, but
it's not supported yet.
I don't think this will ever be supported (without using
opDispatch) – para is a ru
Brian Brady:
// but if I write x[].para if throws an error
This is a quite natural syntax, and I think it's handy, but it's
not supported yet.
Bye,
bearophile
Thanks everyone. OK, so a temporary variable seems to be the most
obvious workaround, thanks Jesse. Thanks also to the others in
pointing out this issue.
All the best,
Stephan
On Wednesday, 21 March 2012 at 14:19:03 UTC, Jesse Phillips wrote:
On Wednesday, 21 March 2012 at 10:51:05 UTC, Ste
#! /usr/bin/rdmd
import std.array;
import std.csv;
import std.stdio;
import std.string;
struct Data{
string Date;
double d1;
double d2;
int i4;
}
double average(Data[] x, string para){
double result = 0.0;
theswitch:switch(strip(para)){
foreach(member;__trait
On 21.03.2012 21:13, Dmitry Olshansky wrote:
On 21.03.2012 20:05, James Oliphant wrote:
While following the regex discussion, I have been compiling the examples
to help with my understanding of how it works.
From Dmitry's example page:
http://blackwhale.github.com/regular-expression.html
and fr
On 21.03.2012 20:05, James Oliphant wrote:
While following the regex discussion, I have been compiling the examples
to help with my understanding of how it works.
From Dmitry's example page:
http://blackwhale.github.com/regular-expression.html
and from the dlang.org website:
htt
All
This might be relatively trivial so please point me at documentation to read
if it is.
I am creating an array of Structs(is this the best thing to do) as per the
example below.
#! /usr/bin/rdmd
import std.array;
import std.csv;
import std.stdio;
import std.string;
struct Data
{
string Dat
On Wed, Mar 21, 2012 at 04:15:18PM +0100, bearophile wrote:
> Jesse Phillips:
>
> >int[100][string] counts;
> >int[100] a;
> >counts["some_key"] = a;
> >counts["some_key"][20]++;
>
> Someone is currently trying to improve/fix AAs, this seems a
> problem that is worth trying removi
On 03/20/2012 07:01 PM, Pedro Lacerda wrote:
Hi all,
How to convert the following struct to D?
typedef struct S {
int type;
void *obj;
} S;
I didn't found anything at http://dlang.org/htomodule.html.
(Assuming your 'int' is 32 bits)
struct S{
int type;
void* obj;
}
While following the regex discussion, I have been compiling the examples
to help with my understanding of how it works.
>From Dmitry's example page:
http://blackwhale.github.com/regular-expression.html
and from the dlang.org website:
http://dlang.org/phobos/std_regex.html
std.reg
Jesse Phillips:
int[100][string] counts;
int[100] a;
counts["some_key"] = a;
counts["some_key"][20]++;
Someone is currently trying to improve/fix AAs, this seems a
problem that is worth trying removing.
Bye,
bearophile
Jesse's solution is correct, but I thought I'd throw in a
comment or two.
You are correct that the associative array is uninitialized
by default, and that you must initialize it. For very small
static arrays, a simple array literal like [1, 2, 3] would
suffice, but for larger arrays, this is a p
On Wednesday, 21 March 2012 at 10:51:05 UTC, Stephan wrote:
Hi,
I have an associative array with strings as keys and static
arrays as values. When I access a new key, it gives me Range
Error, so I think I should initialise the associative array,
but how?
here is the code that fails:
int[10
Am 21.03.2012 11:51, schrieb Stephan:
Hi,
I have an associative array with strings as keys and static arrays as
values. When I access a new key, it gives me Range Error, so I think I
should initialise the associative array, but how?
here is the code that fails:
int[100][string] counts;
counts[
Hi,
I have an associative array with strings as keys and static
arrays as values. When I access a new key, it gives me Range
Error, so I think I should initialise the associative array, but
how?
here is the code that fails:
int[100][string] counts;
counts["some_key"][20]++;
// core.exceptio
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