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## Collection filling with Collect strange behavior

Hi There,

I have some strange behavior. I am doing the course on Microsoft Learn. The Exercise - Work with external data in a canvas app. It places a Gallery on a screen and couples an excel sheet with three items. The items in the gallery are:

Name | UnitPrice

Mint | 6.19

Rose | 8.45

Cinnamon | 9.99

I am taking the following steps:

1. Collect(ItemCollection, Items)
Result itemCollection

Name | UnitPrice

Mint | 6.19

Rose | 8.45

Cinnamon | 9.99

2. Collect(ItemCollection, Filter(Items, Value(UnitPrice)>7))
Result itemCollection

Name | UnitPrice

Rose | 8.45

Cinnamon | 9.99

3. Collect(ItemCollection, Filter(Items, Value(UnitPrice)<7))
Result itemCollection

Name | UnitPrice

Mint | 6.19

4. Collect(ItemCollection, Items)
Result itemCollection

Name | UnitPrice

Mint | 6.19

Mint | 6.19

Rose | 8.45

Cinnamon | 9.99

Question is: why it isn't adding in step 3 the Mint to the itemcollection, but clears it. Why is it adding the all the items in step 4 without clearing? Hopefully someone can answer my question.

Regards,

Stefan

1 ACCEPTED SOLUTION

Accepted Solutions
Community Champion

Am wondering why you expect 3 items instead of 4 in the collection after you have run the collect twice.

How did you come about the 3 items because my test gave 4 not 3.

You repeated the Formula:

Collect(ItemCollection, Filter(Items, Value(UnitPrice)>7))

So each produces 2 items at a time. This ,makes the items in the Second collection 4.

Second Collection

If you rather turn the Forumula like:

Collect(ItemCollection, Filter(Items, Value(UnitPrice)>7))

and

Collect(ItemCollection, Filter(Items, Value(UnitPrice)<7))

Then you will get 1 item in the first collection and 2 in the Second Collection making it 3

------------

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6 REPLIES 6
Community Champion

In step 3, it does not clear the collection but rather Filters. That is everything is shown in the collection from point2 buy the Formula Filters or reduces the items based on the <7

In step 4, the three main items in the Table is Added to the Step 3 which has only 1 item in the collection at that point. This makes it 4 items at step 4. Thus Mint | 6.19 is duplicated because it already exist in step 3

------------

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Frequent Visitor

Hi there,

Thanks for the fast response. I don't understand the answer:

In step 1 all items are collected in the ItemCollection from items

In step 2 items are collected in the itemCollection with a filter on items. In this step also itemCollections isn't cleared. I would expect an add from the two items.

In step 3: same as step 2 based on another filter.

in Step 4: Collect on the items. I would expect an add of three items.

So questions is why does it basically do a clear when it filters and why it doesn't do a clear in step 4?

Regards, Stefan

Community Champion

There is a difference between ClearCollect and Collect.

As the name suggest ClearCollect, clears the collection and do a fresh collection.

What you are using is collect in all the 4 formulas you quoted. So don't use clear in your question, rather use filter not clearing of records.

So questions is why does it basically do a clear when it filters and why it doesn't do a clear in step 4?

When it filters, it does not clear, it only makes a selection out of the total list of items available in the collection based on the criteria.

------------

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Frequent Visitor

Hi there,

I understand clearcollect and collect. In my example I don't use clearcollect only collect. I would assume, starting with an empty collection would result in the following:

Collect(ItemCollection, Filter(Items, Value(UnitPrice)>7))
Result: itemCollection

Name | UnitPrice

Rose | 8.45

Cinnamon | 9.99

Doing new collect with Collect(ItemCollection, Filter(Items, Value(UnitPrice)>7))

Result: itemCollection

Name | UnitPrice

Rose | 8.45

Cinnamon | 9.99

Mint | 6.19

This is not the case. Question is why it isn't or do I do something wrong?

Community Champion

Am wondering why you expect 3 items instead of 4 in the collection after you have run the collect twice.

How did you come about the 3 items because my test gave 4 not 3.

You repeated the Formula:

Collect(ItemCollection, Filter(Items, Value(UnitPrice)>7))

So each produces 2 items at a time. This ,makes the items in the Second collection 4.

Second Collection

If you rather turn the Forumula like:

Collect(ItemCollection, Filter(Items, Value(UnitPrice)>7))

and

Collect(ItemCollection, Filter(Items, Value(UnitPrice)<7))

Then you will get 1 item in the first collection and 2 in the Second Collection making it 3

------------

If you like this post, give a Thumbs up. Where it solved your request, Mark it as a Solution to enable other users find it.

Frequent Visitor

Hi there, thanks for the reply. I now have connected the collection to a data table. I can see it adds all the time to the collection. I don't know why in the other collection I saw a clear after adding all the items without a filter. Thanks for your help and thinking with me. Regards, Stefan

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