I'm surprised at how hard this has been to do but I imagine it's a quick fix so I will ask here (searched google and documentation but neither helped). I have some code that adds items to a collection using keys. When I come across a key that already exists in the collection, I simply want to set it by adding a number to the current value.Here is the code: If CollectionItemExists(aKey, aColl) Then 'If key already has a value'add value to existing itemaColl(aKey).Item = aColl(aKey) + someValueElse'add a new item to the collection (aka a new key/value pair)mwTableISODA.Add someValue, aKeyEnd IfThe first time I add the key/value pair into the collection, I am adding an integer as the value.
![Vba Collection Of Integers Vba Collection Of Integers](/uploads/1/2/5/6/125621256/373878930.png)
An ArrayList is a collection from a standard System.Collections namespace. It is a dynamic array. It provides random access to its elements. An ArrayList automatically expands as data is added. Unlike arrays, an ArrayList can hold data of multiple data types. Re: Set Theory or Array Operations in VBA I was searching for what others have done (within the Excel VBA environment) for set operations, and there isn't much to find. Some may think VBA can't do it, but I say it's a matter of implementing integer constants and using the Boolean operations on those integers.
When I come across the key again, I try to add another integer to the value, but this doesn't work. I don't think the problem lies in any kind of object mis-match or something similar. The error message I currently get isRuntime Error 424: Object Required. You can't edit values once they've been added to a collection.
So this is not possible: aColl.Item(aKey) = aColl.Item(aKey) + someValueInstead, you can take the object out of the collection, edit its value, and add it back. Temp = aColl.Item(aKey)aColl.Remove aKeyaColl.Add temp + someValue, aKeyThis is a bit tedious, but place these three lines in a Sub and you're all set.Collections are more friendly when they are used as containers for objects (as opposed to containers for 'primitive' variables like integer, double, etc.). You can't change the object reference contained in the collection, but you can manipulate the object attached to that reference.On a side note, I think you've misunderstood the syntax related to Item. You can't say: aColl(aKey).Item.
The right syntax is aColl.Item(aKey), or, for short, aColl(aKey) since Item is the default method of the Collection object. However, I prefer to use the full, explicit form.
Traditionally, VBA programmers have used integers to hold small numbers, because they required less memory. In recent versions, however, VBA converts all integer values to type Long, even if they are declared as type Integer.
Code: Sub TestMacroConst FirstHouse As Long = 1, SecondHouse As Long = 2, ThirdHouse As Long = 4, FourthHouse As Long = 8, FifthHouse As Long = 16Const SixthHouse As Long = 32Const SeventhHouse As Long = 64, EighthHouse As Long = 128, NinthHouse As Long = 256, TenthHouse As Long = 512, EleventhHouse As Long = 1024Const TwelfthHouse As Long = 2048Const Kendras As Long = FirstHouse Or FourthHouse Or SeventhHouse Or TenthHouse'value of Kendras is 585, and I could have used the + operator, but we ARE setting this up for Boolean operations, so.Debug.Print 'The sixth house is a member of Kendras? ' & ((SixthHouse And Kendras) 0)Debug.Print 'The fourth house is a member of Kendras? ' & ((FourthHouse And Kendras) 0)End SubThe code sample is intended for a Hindu Astrology program, the idea is to computer a person's chart, and then run a series of conditional tests for various combinations of planets in houses, planets in signs, etc.Kendras is a collective term for the first, fourth, seventh, and tenth houses.The OR operation creates a set, or a union of sets.The AND operation tests for the intersection of sets.Don't scrimp on parantheses; the code will crash.
![Function Function](/uploads/1/2/5/6/125621256/468208762.png)
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