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Compare two list rows/arrays to find differences

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Posted on by raoraheel

I have data coming from two sources that I have in a select to map similar column names and would like to compare property values for each. Example is Col1 from excel is equal to Col1 of other target or not.

I can do a compare by explicitly using a condition to compare each individual property but wondering if there is a better and less time consuming way. Especially if the number of properties here will be way more than just four.

Any suggestions what would be the best way to accomplish this? Let me know please.

Thanks,
Raheel

@abm

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CFernandes 8,504 Most Valuable Professional on at

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Hey @raoraheel

Perhaps you are use INTERSECT.

The outcome of which is a list of ALL names that appear in BOTH lists but are not unique to either..

OR use UNION - The outcome of which is a list of ALL names from BOTH lists.

You can find some useful information at - https://www.damobird365.com/efficien-union-except-and-intersect-great-method/

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raoraheel 90 on at

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Hi @CFernandes , The intersection works and gets me values that match. What I would eventually like to see is non-matching values. So say reverse of intersection.
CFernandes 8,504 Most Valuable Professional on at

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Hey @raoraheel

What about EXCEPT

An Except clause will return the elements of the first Array that DO NOT APPEAR in the second Array. You can find details in the article https://www.damobird365.com/efficien-union-except-and-intersect-great-method/

The idea would be to use a Filter Array -

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raoraheel 90 on at

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@CFernandes I couldn't get it to work and can't seem to figure out what i'm doing wrong.

"inputs": {
        "from": "@body('SelectParamValues')",
        "where": "@not(contains(body('SelectExcelValues'), item()))"
    }

This is the result of the filter array. My expectation is that Col3 is a mis-match and should be the only result. Any thougts?
CFernandes 8,504 Most Valuable Professional on at

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@raoraheel - I had done this last year(2021) - I will test and let you know early next week...
CFernandes 8,504 Most Valuable Professional on at

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Hey @raoraheel

Let me first see if I understand correctly -

Array 1

[
"Clavin",
"Fernandes",
"Mano"
]

Array 2

[
"Clavin",
"Fernandes",
"Balazs"
]

Except Ouput -

"Balazs"

Is this what you need?

If this reply has answered your question or solved your issue, please mark this question as answered. Answered questions helps users in the future who may have the same issue or question quickly find a resolution via search. If you liked my response, please consider giving it a thumbs up. THANKS!

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raoraheel 90 on at

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@CFernandes kind of, yes. Below is the exact data that i'm trying to compare. If you look here, Value for Col3 is different in both arrays. What I am trying to achieve is to identify that Col3 has a different value. Does that make sense? Appreciate your time here. Thanks!

Array 1:
[
  {
    "Col1": "No",
    "Col2": "ValidateMasterData",
    "Col3": "2",
    "Col4": "No"
  }
]

Array 2:

[
  {
    "Col1": "No",
    "Col2": "ValidateMasterData",
    "Col3": 0,
    "Col4": "No"
  }
]