How can I find the index of the original list while filtering in DMN

[Ravi Mangalagiri]

Hi Kogito Team,

I have a list of people, and I am trying to filter them through a decision. In addition to the filtered list, I do need the original index

for example

Decision: people

[

{name: "Ravi", sex: "Male", age:46},    -- index:0

{name: "Ram", sex: "Male", age: 38}, -- index:1

{name: "Shyam", sex: "Male", age: 52}  -- index:2

]

Decision: filterPeople

people[age > 40] returns

[{name: "Ravi", sex: "Male", age:46},    -- index:0

{name: "Shyam", sex: "Male", age: 52}] -- index:2

Is it possible to filter the list and return the original list index?

Thanks

Ravi

--

Ravi Mangalagiri
703-505-4240 (c)

[Matteo Mortari]

Hi Ravi,

since FEEL list indexes are 1-based, this is a oneliner.

( for idx in 1..count(people) return { person: people[idx], index: idx } )[person.age>40]

Assuming you want as output a context with two entries, person for the original filtered item from the people collection, and index as its associated index.

Of course you can modify it to suit better if you want to return the indexes 0-based, in a trivial way (=> ... index: idx-1 ... )

HOpe this helps,

MM

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Matteo Mortari

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[Ravi Mangalagiri]

Thanks, Matteo

It works. attached is the sample dmn for the context of the thread.

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