• Wolftousen Frozenwind (14/14) Mar 24 2008 I'm trying to have an associative array with the key value of type ushor...
• Simen Kjaeraas (13/28) Mar 24 2008 My guess would be that data[keys[x]] does not yet exist when you attempt...
• Steven Schveighoffer (17/31) Mar 24 2008 two problems in your for loop. One is:
• Steven Schveighoffer (5/31) Mar 24 2008 Err... I might be wrong on this :) If some_number is a value and not a

Wolftousen Frozenwind <eliot.darkwolf gmail.com> writes:

I'm trying to have an associative array with the key value of type ushort.
\
struct struct_name
{
     int variable_name;
}

ushort[some_number] keys;

//fill keys

//declare my associative array
struct_name[ushort] data;

//in a loop, filling data
for(x = 0; x < keys.length; x++)
     data[keys[x]].variable_name = some_int;

I get an array out of bounds error when running this.  Any one help?

"Simen Kjaeraas" <simen.kjaras gmail.com> writes:

On Mon, 24 Mar 2008 20:29:23 +0100, Wolftousen Frozenwind  =

<eliot.darkwolf gmail.com> wrote:

 I'm trying to have an associative array with the key value of type  =

 ushort.
 \
 struct struct_name
 {
      int variable_name;
 }

 ushort[some_number] keys;

 //fill keys

 //declare my associative array
 struct_name[ushort] data;

 //in a loop, filling data
 for(x =3D 0; x < keys.length; x++)
      data[keys[x]].variable_name =3D some_int;

 I get an array out of bounds error when running this.  Any one help?


My guess would be that data[keys[x]] does not yet exist when you attempt=
  =

to set its member variable_name.
If I am correct, this should work instead:

for(x =3D 0; x < keys.length; x++)
{
      data[keys[x]] =3D struct_name(); // call static opCall or other in=
it  =

function here
      data[keys[x]].variable_name =3D some_int;
}

"Steven Schveighoffer" <schveiguy yahoo.com> writes:

"Wolftousen Frozenwind" wrote
 I'm trying to have an associative array with the key value of type ushort.
 \
 struct struct_name
 {
     int variable_name;
 }

 ushort[some_number] keys;

 //fill keys

 //declare my associative array
 struct_name[ushort] data;

 //in a loop, filling data
 for(x = 0; x < keys.length; x++)
     data[keys[x]].variable_name = some_int;

 I get an array out of bounds error when running this.  Any one help?

two problems in your for loop.  One is:

for(x = 0; x < keys.length; x++)

Since keys is an associative array, the keys are not guaranteed to be 
sequential.  You should do:

foreach(x; keys) // compiler implies that x is the value type of your AA.

This also is more efficient than doing the key lookup for each loop.

The second problem is your data statement.  Just accessing an array element 
does not create it (this is unlike C++'s std::map).  You must create it with 
an assign statement:

foreach(x; keys)
{
    struct_name sn;
    sn.variable_name = some_int;
    data[x] = sn; // this creates the element in the array.
}

-Steve 

"Steven Schveighoffer" <schveiguy yahoo.com> writes:

"Steven Schveighoffer" wrote
 "Wolftousen Frozenwind" wrote
 I'm trying to have an associative array with the key value of type 
 ushort.
 \
 struct struct_name
 {
     int variable_name;
 }

 ushort[some_number] keys;

 //fill keys

 //declare my associative array
 struct_name[ushort] data;

 //in a loop, filling data
 for(x = 0; x < keys.length; x++)
     data[keys[x]].variable_name = some_int;

 I get an array out of bounds error when running this.  Any one help?

 two problems in your for loop.  One is:

 for(x = 0; x < keys.length; x++)

 Since keys is an associative array, the keys are not guaranteed to be 
 sequential.  You should do:

 foreach(x; keys) // compiler implies that x is the value type of your AA.

Err... I might be wrong on this :)  If some_number is a value and not a 
type, then you have declared a static array.  But I do believe that foreach 
would make an easier-to-read version of your code at least.

-Steve