PowerShell - what is the most efficient/fastest way to find an object in an arraylist

Question

Hi
I Work with a lot of array lists in PowerShell when working as a sharepoint administrator. I first used arrays but found them slow and jumped over to array lists.
Often i want to find a specific object in the array list, but the respons-time varies a lot. Does anyone have code for doing this the most efficient way?
Hope for some answers:-)
brgs
Bjorn

Answer 1

Often i want to find a specific object in the array list, but the respons-time varies a lot. Does anyone have code for doing this the most efficient way?
As you decided to use an ArrayList, you must keep your collection sorted, and then use the method BinarySearch() to find the objects your looking for.
Consider using a dictionary, and if your objects are string type, then a StringDictionary.
You stil fail to understand that he slowness is no in the arraylist.  It is in the creating of the arraylist which is completely unnecessary.  Set up a SharePoint servefr and create a very large list and test..  You will see. An arraylist
with 10000 items takes forever to create. A simple SharePoint search can be done in a few milliseconds.
Once created the lookup in any collection is dependent on the structure of the key and the type of collection.  A string key can be slow if it is a long key.
The same rules apply to general database searches against an index.
The main point here is that SharePoint IS a database and searching it as a database is the fastesst method.
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You seem to be making a lot of assumptions about what he's doing with those arraylists that doesn't seem justified based on no more information than there is in the posted question.
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