• Charma <Motoko_Kusanagi web.de> May 24 2007
• BCS <ao pathlink.com> May 24 2007
• Pragma <ericanderton yahoo.removeme.com> May 24 2007
• Charma <Motoko_Kusanagi web.de> May 24 2007
• Regan Heath <regan netmail.co.nz> May 24 2007
• Bill Baxter <dnewsgroup billbaxter.com> May 24 2007
• pragma <ericanderton yahoo.com> May 24 2007

Charma <Motoko_Kusanagi web.de> writes:

Hello,
i am very new with D (i do know C++ though) so i have a maybe strange question.
Is there any way i can make an array which has char-type keys? Like in php in
which something like that is possible:
array{
    "textbla" => value,
    "anotherText" => value,
    and so on...
}
Or maybe there is another way so i can values in an array with char-strings?
what i want is to save an unsorted file-list in an array, in a way so that i
don't need to look through the whole array to find the file.

Any Idea's?

Thanks

BCS <ao pathlink.com> writes:

Reply to Charma,

 Hello,
 i am very new with D (i do know C++ though) so i have a maybe strange
 question. Is there any way i can make an array which has char-type
 keys? Like in php in which something like that is possible:
 array{
 "textbla" => value,
 "anotherText" => value,
 and so on...
 }
 Or maybe there is another way so i can values in an array with
 char-strings?
 
 what i want is to save an unsorted file-list in an array, in a way so
 that i don't need to look through the whole array to find the file.
 
 Any Idea's?
 
 Thanks
 


there are assortative arrays:

int[ char[] ] arr;

this will allow a string to be used as a key into a mapping (it's a hash 
under the hood). Is that what you want?

Pragma <ericanderton yahoo.removeme.com> writes:

Charma wrote:
 Hello,
 i am very new with D (i do know C++ though) so i have a maybe strange
question. Is there any way i can make an array which has char-type keys? Like
in php in which something like that is possible:
 array{
     "textbla" => value,
     "anotherText" => value,
     and so on...
 }
 Or maybe there is another way so i can values in an array with char-strings?
 what i want is to save an unsorted file-list in an array, in a way so that i
don't need to look through the whole array to find the file.
 
 Any Idea's?
 
 Thanks


What you want is an associative array:

char[char[]] myMap;

myMap["one"] = "first";
myMap["two"] = "second";
myMap["three"] = "third";

http://www.digitalmars.com/d/arrays.html#associative

Traversal is also very easy with this type:

foreach(key,value; myMap){
   writefln("%s => %s",key,value);
}

Tests are done with the 'in' operator:

if("two" in myMap){
   writefln("mymap contains a value for 'two'");
}

-- 
- EricAnderton at yahoo

Charma <Motoko_Kusanagi web.de> writes:

yes! thank you both very much! i am right away to try it. this is a great
forum... my answers are allways answered quick and good.

I will write again if there are any problem.. thanks again ^^;;

Regan Heath <regan netmail.co.nz> writes:

Pragma Wrote:
 What you want is an associative array:
 
 char[char[]] myMap;


minor correction:

char[] [char[]] myMap;

Regan

Bill Baxter <dnewsgroup billbaxter.com> writes:

Regan Heath wrote:
 Pragma Wrote:
 What you want is an associative array:

 char[char[]] myMap;


 minor correction:
 
 char[] [char[]] myMap;
 
 Regan
 


Which is a mistake that's a lot harder to make with a little alias 
magic.  Easier to read the intent as well.

   alias char[] string;

   string[string] myMap;

--bb

pragma <ericanderton yahoo.com> writes:

Regan Heath wrote:
 Pragma Wrote:
 What you want is an associative array:

 char[char[]] myMap;


 minor correction:
 
 char[] [char[]] myMap;
 
 Regan
 


GAh!

Wow, note to self: do not post without coffee.