Triggers

Enter map-specific custom script code below. This text will be included in the map script after variables are declared and before any trigger code.

Unit Indexer gives you an array-safe (1-8190) custom value for units, eliminating the need for hashtables to store unit-specific data.
Just use "Set MyArrayData[(Custom value of Unit)] = (Some data)".
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If you want to get the unit assigned to an index (reverse lookup) use "UDexUnits[(Index)]".
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If you want to detect when an index is created or when it is released, use "UnitIndexEvent Equal to 1.00" (created) or "UnitIndexEvent Equal to 2.00" (released). The index being created/released is called "UDex".
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You can enable/disable Unit Indexer to protect some of your undesirable units from being indexed like this:

Trigger - Turn off Unit Indexer <gen>
Unit - Create 1 Dummy for (Triggering player) at TempPoint facing 0.00 degrees
Trigger - Turn on Unit Indexer <gen>
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If you want to use a Map Initialization trigger that uses custom value of units, to make sure that UnitIndexer initializes first, use the event "UnitIndexEvent Equal to 3.00". Otherwise the custom value of units may be zero.
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Advanced:
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If you want to lock the index of a unit, use "Set UnitIndexLock[(Index)] = (UnitIndexLock[(Index)] + 1)". This will prevent the index from being recycled. If you want to unlock it and allow it to be recycled, run the Unit Indexer <gen> trigger.

Note: Make sure if you add a lock that you will eventually remove the lock, otherwise the index will never be recycled.