Answered

Merging two Arrays of objects

Like (2) Share

Report

Posted on 9 Feb 2022 13:06:44 by Community Power Pla...

Hi

I am trying to merge two arrays of objects to one array.
The two arrays have one property in common that should be used to correlate the data correctly.
The arrays are not sorted in order and have different number of objects.

How do I combine the two arrays into to a single array with three properties using the ID property to correlate them correctly?

Br Martin Strandholm

Array 1:

[
{
"ID": "3333",
"Object_Name": "Power"
},
{
"ID": "1111",
"Object_Name": "Automate"
},
{
"ID": "2222",
"Object_Name": "Function"
}
]

Array 2:

[
{
"ID": "1111",
"Size": "5"
},
{
"ID": "2222",
"Size": "6"
},
{
"ID": "3333",
"Size": "8"
},

{
"ID": "4444",
"Size": "8"
}
]

All responses (14)

Answers (1)

sree813 75 on 17 May 2024 at 07:44:39

Like (2)

Report

Re: Merging two Arrays of objects

Hey @JAWL, I was able to do it in my solution. Here are my two addproperty values which is converted into single expression.

addProperty(item(), 'fine_band', xpath(xml(outputs('XML')), concat('//Array[transaction_id/text()="', item()?['transaction_id'], '"]/fine_band/text()'))?[0])

addProperty(item(), 'transaction_reference', xpath(xml(outputs('XML')), concat('//Array[transaction_id/text()="', item()?['transaction_id'], '"]/transaction_reference/text()'))?[0])

Single Expression:

addProperty(addProperty(item(),'fine_band',xpath(xml(outputs('XML')), concat('//Array[transaction_id/text()="', item()?['transaction_id'], '"]/fine_band/text()'))?[0]),'transaction_reference', xpath(xml(outputs('XML')), concat('//Array[transaction_id/text()="', item()?['transaction_id'], '"]/transaction_reference/text()'))?[0])

Hope this helps you.
Thanks.
Paulie78 8,407 Super User 2025 Season 1 on 22 Jan 2024 at 10:12:18

Like (1)

Report

Re: Merging two Arrays of objects

Did you try testing the xpath query in xpather.com ?
JAWL 391 on 22 Jan 2024 at 01:57:04

Like (1)

Report

Re: Merging two Arrays of objects

@Paulie78 , is there a way to add two properties within a single Select action?
OJBridger 32 on 08 May 2023 at 17:23:14

Like (1)

Report

Re: Merging two Arrays of objects

Sorry for resurrecting an old thread!

I'm having a problem in matching the IDs across the 2 Arrays I have. I've followed your guide to a T, and can't get it to work. I included the '?[0]' in the addProperty command, and it just fills every single item with 'null'

I know for a fact that the ID is present in both arrays, I can even see it on the output of each 'Select' step. The ID I am using is a date concatenated with a unique order number, so: 04/30/2023869. This unique ID is 100% definitely in both arrays and I cannot get it to match. Would the string format be causing this error, maybe the '/'? I'm at a loss!
20Nails 2 on 08 Mar 2023 at 02:02:57

Like (1)

Report

Re: Merging two Arrays of objects

Try to duplicate the steps.

-Just add a PrepareArray1 action:
{
"root": {
"Array": @{outputs('Array1')}
}
}

-Add a XML2 action with the ouputs of the PrepareArray1 action.
xml(outputs('PrepareArray1'))

-Then add a parallel branch and a Select2 action to add the property present in Array1 that is missing in Array2 (in this case, the Object_Name property):
FROM: outputs('Array2')
MAP: addProperty(item(), 'Object_Name', xpath(outputs('XML2'), concat('//Array[ID/text()="', item()?['ID'], '"]/Object_Name/text()'))?[0])

-Then, add a compose action to union both select1 and select2
union(outputs('Select'),outputs('Select2')

This step will merge both arrays without duplicates.

Here the complete flow.

Part1

Part2
svivek 65 on 22 Nov 2022 at 13:44:12

Like (1)

Report

Re: Merging two Arrays of objects

Hi @Paulie78

Thanks for your solution. However I am having one additional query. Kindly help.

Your solution added size for ID: "1111", "2222" and "3333".
However the fourth ID "4444" is NOT showing in the final result. Pls let me know if there is any way to have ID "4444" also included with size as final result as mentioned below:
Like below:

"ID": "4444",
"Object_Name": "Null"
"Size": "8"
svivek 65 on 21 Jul 2022 at 10:49:04

Like (1)

Report

Re: Merging two Arrays of objects

Hi @Paulie78
Thanks for above response it rectified the problem . However the final output value for one item is coming as null. Pls advice.

Following expression used:
xpath(outputs('XML'),concat('//Array[Parameter/text()="', item()?['ID'], '"]/No_Match_Array_1/text()'))?[0])

Following is the flow:

Output of No match array table 2:

Output of No match array table 1:

Final output:
Paulie78 8,407 Super User 2025 Season 1 on 21 Jul 2022 at 07:51:14

Like (1)

Report

Re: Merging two Arrays of objects

You need to use the output of the action Root for XML as the inputs for the XML action. You have used No_match_Array_1_Table
svivek 65 on 21 Jul 2022 at 02:21:06

Like (1)

Report

Re: Merging two Arrays of objects

Hi,
I applied above solution in my case which is:
I need to merge following arrays:
Array 1:
[
  {
    "Parameter": "2A",
    "No Match Array 1": "40"
  }
]

Array 2:
[
  {
    "Parameter": "2A",
    "No Match Array 2": "80"
  }
]
I require final array as
[
  {
    "Parameter": "2A",
    "No Match Array 1": "40"
"No Match Array 2": "80"
  }
]

For this I created following flow. Here both arrays are coming from select operation:

However I am getting following error . Pls advice where am I going wrong.
Paulie78 8,407 Super User 2025 Season 1 on 10 Feb 2022 at 15:55:45

Like (4)

Report
Re: Merging two Arrays of objects

Change the expression to:

addProperty(item(), 'Size', xpath(outputs('XML'), concat('//Array[ID/text()="', item()?['ID'], '"]/Size/text()'))?[0])