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# PowerApps - ForAll function with examples

In this article, we are going to go through various **ForAll** function examples that can be used in your applications. **ForAll** is one of the widely used functions in PowerApps. Let’s understand in detail, how and where you can use the **ForAll** function using some **examples**.

**Note**:

- In PowerApps, when you want to execute some functionality on each row on a specific table/database/collection, you can use
**ForAll**function - The function inside the
**ForAll**, cannot operate on the same data source that is used in**ForAll**, we will check this in detail in the Examples section below. **Input and return value**: Whatever is the input of the ForAll function, the**same will be the return value**as well. So, if you use a table in For Loop, the return value will be a table only. Same way, you can use a collection or single-column table also.- Records can be
**processed in any order**. - You can perform multiple operations by using separator (;).
- You
**CANNOT use**a function like**Upatecontext, Clear, ClearCollect**,**Set**, etc… because these functions can hold the variable which is vulnerable to the ordering issues for the current For loop.

Page Contents

- PowerApps ForAll function Syntax
- PowerApps ForAll Functions Examples
- The function inside the ForAll, cannot operate on the same data source that is used in ForAll
- The right side of the “Equal” operator must be a constant value
- PowerApps ForAll Patch current item using Result
- PowerApps ForAll Split
- PowerApps ForAll RemoveIf
- PowerApps ForAll Patch defaults
- PowerApps ForAll get current record
- PowerApps ForAll UpdateIf function

## PowerApps ForAll function Syntax

**ForAll(Table, Formula)**

**Table:**This is**required**. Pass the table or collection or data source to process.**Formula**: This is**required.**- This will be executed for each row of the table passed in the first parameter.

## PowerApps ForAll Functions Examples

We will use the below table for our examples.

**Table Name**: Weathers

## The function inside the ForAll, cannot operate on the same data source that is used in ForAll

- Look at the script. The data source used in ForAll and the data source used inside Forall (Patch function) are the same. This is NOT CORRECT.
- As the statement specifies, you cannot just loop through the same data and simultaneously update it also.
**Solution**:- The simple solution about it is you can create a collection using actual data and loop through that collection.
- Call this formula: ClearCollect(TempCollection, Weathers);
- Now you can work on TemCollection.

ForAll(TempCollection, Patch(

Weathers,

First(Filter(Weathers, Humidity > 75 ) ),

{Temperature: 97}

)

)

## The right side of the “Equal” operator must be a constant value

**Issue**:- The above-mentioned error we get when we try to loop through the items but in the same condition, we have used ThisRecord.ColumnName for comparison in the formula
- Here, we have created a collection(TempCollection) using a table(Weathers).
- Looping through each record of collection, we are patching the record in the table which matches the formula.
- Now, in the formula, we have used ThisRecord.Columnname – which takes column from the collection (which is in Loop right now)
- BUT, PowerApps is denying this operation saying
**on the right-hand side you can specify only a static value to compare**.

**Solution**:- While creating a collection (TempCollection), we will
**rename the column**that we want to use in the ForAll function. - Then we can use that renamed column in For loop without any error.
- Here, you can notice that even though we haven’t used
**ThisRecord.ColumnName**in condition, we have used it while updating the value back in the database.ClearCollect(TempCollection, RenameColumns(Weathers, "humidity", "newHumidity"));

ForAll(TempCollection,Patch(

Weathers,

LookUp(Weathers,Humidity = newHumidity),

{Temperature: Value(ThisRecord.Temperature) + 100}

)

)

- While creating a collection (TempCollection), we will

## PowerApps ForAll Patch current item using Result

- If you have a
**single column collection**, then you can use**Result**to get the current item in the loop.

In this example, we will get a **distinct record from a table and create a collection,** and then based on that collection we will run a For Loop.

- You can
**Patch multiple records**using below PowerApps formula. **NOTE**: This is a very important formula to keep not of as it contains widely used functions of**PowerApps - ForAll, Patch, and LookUp**.

ClearCollect(TempCollection,

Distinct(

Weathers,

Humidity

)

);

ForAll(

TempCollection,

Patch(

Weathers,

LookUp(

Weathers,

Humidity = Result

),

{Temperature: Value(ThisRecord.Temperature) + 100}

)

);

**Explanation:**In the first part of the example, we are creating a collection with a distinct value of the Humidity column.- In the second part, we are using
**Result**in the formula which is nothing but the Humidity column we added in the earlier step.

## PowerApps ForAll Split

- If you want to split a string and loop through the result of it then you can use the below formula.

- Use the
**Split**formula in**ForAll**function’s**Source parameter**. - You can grab the table of substrings (Output of Split) into a collection using
**Result**in ForAll function. - We are collecting substrings in
**FinalCollectionUsingSplit**collectionForAll(

Split("Lorem Ipsum is simply dummy text of the printing and typesetting industry", " "),

Collect(

FinalCollectionUsingSplit,

Result

)

);

## PowerApps ForAll RemoveIf

- If you want to delete records while looping through the records, you can use the below formula.
ForAll(

TempCollection, RemoveIf(Weathers, newHumidity = Value(ThisRecord.Humidity) + 10 )

);

## PowerApps ForAll Patch defaults

- In Patch,
**Default**is used when you want to**create a new record**in your table. - When you want to create a new record in your table for each row that you are looping in your
**ForAll**function, you can use this formula.ForAll(

TempCollection,

Patch(Weathers, Defaults(Weathers), {Temperature: ThisRecord.Temperature});

);

## PowerApps ForAll get current record

- If there are
**multiple columns**in the collection being operated for**ForAll,**you can get the current records by**ThisRecords.ColumnName** - If there is only
**one column**in the collection being operated for**ForAll,**you can get the current record by**result**

## PowerApps ForAll UpdateIf function

**UpdateIf**has a similar implementation like Patch in the**ForAll**- The only difference is how UpdateIf performs on data.
- Patch updates or creates only one row at a time while UpdateIf can update more than one record at a time.

Let us know if you have any difficulties using the ForAll function, we will try to cover them here.

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