Delphi multiple indexed generic list

Question

I am looking for a TList descendent which lets me add one or more indexes and lets me search and view by these indexes.

A 30min google search session has left me with nothing.

This must have been needed before. I mean how many times have you had a in memory indexed collection and then needed to display it in a different order?

Thanks,

AJ

Have you looked at delphi-coll ? Lots of generic list types with different sorting algorithms. — LU RD
– LU RD, Commented Jan 10, 2012 at 17:38

mjn · Accepted Answer · 2012-01-10 17:09:42Z

7

Have you considered TClientDataSet? It can be sorted and filtered at runtime. An article can be found at http://edn.embarcadero.com/article/29056

answered Jan 10, 2012 at 17:09

mjn

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Community · Accepted Answer · 2017-05-23 12:32:52Z

7

If you are looking for a generic implementation of a Multimap in Delphi, LU RD has pointed to you the right direction in his comment above on delphi-coll.

The namespace Collections.MultiMaps provides a bunch of classes:

TDistinctMultiMap: The generic multi-map collection.
TDoubleSortedDistinctMultiMap: The generic multi-map collection.
TDoubleSortedMultiMap: The generic multi-map collection.
TMultiMap: The generic multi-map collection.
TObjectDistinctMultiMap: The generic multi-map collection designed to store objects.
TObjectDoubleSortedDistinctMultiMap: The generic multi-map collection designed to store objects.
TObjectDoubleSortedMultiMap: The generic multi-map collection designed to store objects.
TObjectMultiMap: The generic multi-map collection designed to store objects.
TObjectSortedDistinctMultiMap: The generic distinct multi-map collection designed to store objects.
TObjectSortedMultiMap: The generic multi-map collection designed to store objects.
TSortedDistinctMultiMap: The generic distinct multi-map collection.
TSortedMultiMap: The generic multi-map collection.

edited May 23, 2017 at 12:32

CommunityBot

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answered Jan 10, 2012 at 18:20

menjaraz

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2 Comments

Eduardo Elias Over a year ago

seems that the repository was changed to this place: github.com/ghquant/delphi-coll

DelphiCoder Over a year ago

a more up to date repo: github.com/delphidabbler/delphi-coll-xe

Marcus Adams · Accepted Answer · 2012-01-10 18:24:48Z

0

You can use a sorted TStringList for your index. While it might be nice if your index were encapsulated into your main list object, that's no reason to let it stop you.

Create a new TStringList and have the Object pointer point to whatever you need.

answered Jan 10, 2012 at 18:24

Marcus Adams

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Comments

onedevteam.com · Accepted Answer · 2012-01-10 17:09:13Z

-1

I'm not sure if delphi supports multiple indexed lists... Maybe you can try with TMS TColumnListBox?

answered Jan 10, 2012 at 17:09

onedevteam.com

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2 Comments

David Heffernan Over a year ago

That sounds like a visual control.

Marjan Venema Over a year ago

@DavidHeffernan it doesn't just sound like it, it walks like it and it quacks like it, in fact, it simply is...

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