Compare 2 JSON arrays to get matching and un-matching outputs - mule

Question

I need to compare 2 JSON arrays using Mule 4 dataweave 2.0 to get matching and un-matching outputs.
The sample input JSON payload is given below:
[
{
"CODE": "A11",
"NAME": "Alpha",
"ID": "C10000"
},
{
"CODE": "B12",
"NAME": "Bravo",
"ID": "B20000"
},
{
"CODE": "C11",
"NAME": "Charlie",
"ID": "C30000"
},
{
"CODE": "D12",
"NAME": "Delta",
"ID": "D40000"
},
{
"CODE": "E12",
"NAME": "Echo",
"ID": "E50000"
}
]
This has to be compared to the below on ID/IDENTITY field.
[
{
"IDENTITY": "D40000",
"NM": "Delta"
},
{
"IDENTITY": "C30000",
"NM": "Charlie"
}
]
My expected output is 2 variable arrays containing matching and un-matching objects:
varMatch:
[
{
"CODE": "C11",
"NAME": "Charlie",
"ID": "C30000"
},
{
"CODE": "D12",
"NAME": "Delta",
"ID": "D40000"
}
]
varUnmatch:
[
{
"CODE": "A11",
"NAME": "Alpha",
"ID": "C10000"
},
{
"CODE": "B12",
"NAME": "Bravo",
"ID": "B20000"
},
{
"CODE": "E12",
"NAME": "Echo",
"ID": "E50000"
}
]

Answer 1

If that ID map is coming from somewhere else and you can't change its structure, I'd probably remap it and then use it like so:
%dw 2.0
output application/json
var identMap = [
{
"IDENTITY": "D40000",
"NM": "Delta"
},
{
"IDENTITY": "C30000",
"NM": "Charlie"
}
]
var remapped = identMap reduce ((item,accum={}) -> accum ++ (item.IDENTITY): 1)
---
payload groupBy (if (remapped[$.ID]?) "varMatched" else "varUnmatched")
which produces
{
"varUnmatched": [
{
"CODE": "A11",
"NAME": "Alpha",
"ID": "C10000"
},
{
"CODE": "B12",
"NAME": "Bravo",
"ID": "B20000"
},
{
"CODE": "E12",
"NAME": "Echo",
"ID": "E50000"
}
],
"varMatched": [
{
"CODE": "C11",
"NAME": "Charlie",
"ID": "C30000"
},
{
"CODE": "D12",
"NAME": "Delta",
"ID": "D40000"
}
]
}

Answer 2

Hope this helps
%dw 2.0
var input1=[{
"CODE": "A11",
"NAME": "Alpha",
"ID": "C10000"
},
{
"CODE": "B12",
"NAME": "Bravo",
"ID": "B20000"
},
{
"CODE": "C11",
"NAME": "Charlie",
"ID": "C30000"
},
{
"CODE": "D12",
"NAME": "Delta",
"ID": "D40000"
},
{
"CODE": "E12",
"NAME": "Echo",
"ID": "E50000"
}
]
var input2=[
{
"IDENTITY": "D40000",
"NM": "Delta"
},
{
"IDENTITY": "C30000",
"NM": "Charlie"
}
]
var varMatch = input1 map $ filter (input2.IDENTITY contains $.ID)
var varUnmatch = input1 -- varMatch
output application/json
---
{
varMatch: varMatch,
varUnmatch: varUnmatch
}
Sample Output
{
"varMatch": [
{
"CODE": "C11",
"NAME": "Charlie",
"ID": "C30000"
},
{
"CODE": "D12",
"NAME": "Delta",
"ID": "D40000"
}
],
"varUnmatch": [
{
"CODE": "A11",
"NAME": "Alpha",
"ID": "C10000"
},
{
"CODE": "B12",
"NAME": "Bravo",
"ID": "B20000"
},
{
"CODE": "E12",
"NAME": "Echo",
"ID": "E50000"
}
]
}

Answer 3

Here's another solution, albeit the previous two are solving your problem:
%dw 2.0
output application/dw
var data = [
{
"CODE": "A11",
"NAME": "Alpha",
"ID": "C10000"
},
{
"CODE": "B12",
"NAME": "Bravo",
"ID": "B20000"
},
{
"CODE": "C11",
"NAME": "Charlie",
"ID": "C30000"
},
{
"CODE": "D12",
"NAME": "Delta",
"ID": "D40000"
},
{
"CODE": "E12",
"NAME": "Echo",
"ID": "E50000"
}
]
var searchData = [
{
"IDENTITY": "D40000",
"NM": "Delta"
},
{
"IDENTITY": "C30000",
"NM": "Charlie"
}
]
---
data dw::core::Arrays::partition (e) -> searchData.*IDENTITY contains e.ID
Pick the one that perfoms the best and use it.