Questions tagged [tdictionary]
38 questions
2
votes
3 answers
Equals and GetHashCode for TDictionary
If I implement a relationship Car <-> Owner in Delphi using a TDictionary, how should I implement the Equals and GetHashCode function of the IEqualityComparer? (GetHashCode returns an Integer which is used for hashing in TDictionary.)
For the…
mjn
- 36,362
- 28
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2
votes
1 answer
Default IEqualityComparer for TDictionary?
I just read
"Any class that implements the
IEqualityComparer interface is
expected to provide the implementation
for the Equals method." - (Delphi
DocWiki)
and
"Any class that implements the
IEqualityComparer interface is
expected to…
mjn
- 36,362
- 28
- 176
- 378
2
votes
1 answer
Delphi Dictionary Save/Load. TDictionary not serializable?
TDictionary : SaveToFile / LoadFromFile
What an elegant solution!
To begin with, everything runs as expected.
The content is saved to a file in a JSON format that looks right.
But after reloading the file, there is a problem:
Type
…
user8944040
2
votes
1 answer
Delphi - Confused about memory allocation in TDictionary
In Delphi XE6, I have a TDictionary called WordDict which holds instances of TWordRec. Definitions are:
WordDict: TDictionary;
...
type
TWordRec = class
public
RemoveAlways: Boolean; // Is this CORP LLC, etc?
…
user1009073
- 3,160
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- 82
2
votes
1 answer
GetItem on TDictionary eleminated by linker
I am using a TDictionary of . But for some reason, the linker decides that I do not want to get items out of it.
I have the following code:
function TSheet.GetFieldName(Field: string; Default: string): string;
begin
Result :=…
Svip
- 2,958
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- 33
1
vote
0 answers
TDictionary equivalent that can store a few values
I can't use 'TDictionary' as I need a few Values to tag to every Key,
instead of 1 value to 1 key.
Example key=1, value1=label1, value2=button3
Example key=2, value1=label5, value2=button7
Will a memory table be best? What is the best TField to use…
Peter Jones
- 451
- 2
- 12
1
vote
2 answers
Index (type) for searching (large) unsorted array
I have program that loads a (sometimes) large CSV file into an array. The data cannot be sorted, and I do not know if the data is text or numbers. This is up to customers.
Example could be
1;JOHN;DOE
2;JANE;DOE;
3;BOBBY;NOTABLES
but it could also…
MyICQ
- 987
- 1
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- 25
1
vote
3 answers
TDictionary - invalid key
I have code like this:
type
TMyDictionary = TDictionary;
var
myDict: TMyDictionary;
k, v: integer;
// code to fill the dictionary
for k in myDict.Keys do
begin
v := myDict.Items[k];
// other stuff
end;
Randomly…
TheArtTrooper
- 1,105
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1
vote
1 answer
delphi scope of variables question
i fill a tdictionary , read from a file, to iterate over the key-value-pairs. iterating was solved in delphi dictionary iterating.
the problem is that the values in the dict are not kept, probably a scope-problem with variables. i am more used to…
soulbrother
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1
vote
1 answer
delphi dictionary iterating
g'morning!
i fill a dictionary TDictionary (delphi-collections-unit) with strings as values and several strings as values.
something like:
names = john, lisa, stan
skills = read, write, speak
ages = 12, 14, 16
(without "," of…
soulbrother
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- 2
- 2
- 7
1
vote
3 answers
What type of collection should I use? delphi
I want to use one keys for two values in Delphi some thing like this
TDictionary;
Newbie Tester
- 13
- 5
1
vote
1 answer
In a Delphi TDictionary, my Value objects are inserting as null
I'm using Delphi 9's TDictionary generic class. My TDictionary looks like this:
g_FileHandlers : TDictionary>;
And, so I initialize the TDictionary like so:
g_FileHandlers := TDictionary>.Create;
I have…
Ryan
- 7,733
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1
vote
1 answer
TDictionary duplicate entry (Delphi)
I am trying to add following values to
procedure TForm1.FormCreate(Sender: TObject);
var
md: TDictionary;
s, v: string;
begin
md := TDictionary.Create;
try
s := 'orange';
v := 'fruit';
md.Add(s,…
blacksun
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- 24
0
votes
0 answers
Delphi 11, tDictionary containing tObjects
I have a tDictionary of variant items, I can add anything I wish, including objects.
My app has a "render" function that iterates through the dictionary and converts whatever it finds into string and finally displays them all as a single document.
I…
thrutch
- 13
- 6
0
votes
1 answer
Is it possible in Delphi to declare a TDictionary with a Generic value type?
Can Delphi make the following statement?
TDictionary >
The compiler doesn't like it:
Undeclared identifier: 'T'
I have added in the uses clause:
System.Generics.Collections;
UPDATE: With this code I have these…
jmontegrosso
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