The map function is used to perform one to one mapping on elements from an array to a result array, after some processing or as is.

Syntax

resultArray = map(array {Range} -> {
                  result_attr_i1 = array_attr_k1
                  result_attr_i2 = array_attr_k2
              })

Inputs

array : a reference to an array.

Range :This is an optional input giving a sequence of integers. Please refer [[Range]] for the syntax. Map function will only execute on elements in the input array at given sequence of indices.

Output

resultArray : Array returned after the mapping.

Example flow

Schema inputSchema {
    string a
    string b
    number c
    boolean d
    object {
        string a
        string b
    }
    array [
        string a
        string b
        string c
        number d
    ]
}

value inputValue -> inputSchema {
    "A"
    "B"
    1
    true
    object {
        "a"
        "b"
    }
    array [
        {
            "a"
            "a"
            "c"
            100
        }
        {
            "a"
            "b"
            "c"
            10
        }
        {
            "a"
            "b"
            "c"
            1
        }
        {
            "a"
            "b"
            "c"
            0
        }
    ]
}

Schema outputSchema {
    mapArray [
        string name
        string desc
        string amount
    ]
    mapObject {
        string name
        string value
    }
    mapArrayWithRange [
        string name
        string desc
        string amount
    ]

}

Mapping outPutMapping input inputValue as inputValue output outputSchema {

    outputSchema.mapArray = map(inputValue.array->{
        name = a
        desc = b
        amount = d
    })

    outputSchema.mapArrayWithRange = map(inputValue.array{0..1}->{
        name = a
        desc = b
        amount = d
    })

    outputSchema.mapObject = map(inputValue.object->{
        name = a
        value = b
    })
}

Flow mapFlow {
    Start outPutMapping{}
}


Output:
{
    "mapArray":
    [
        {
            "name": "a",
            "desc": "a",
            "amount": 100
        },
        {
            "name": "a",
            "desc": "b",
            "amount": 10
        },
        {
            "name": "a",
            "desc": "b",
            "amount": 1
        },
        {
            "name": "a",
            "desc": "b",
            "amount": 0
        }
    ],
    "mapObject":
    {
        "name": "a",
        "value": "b"
    }
    "mapArrayWithRange":
    [
        {
            "name": "a",
            "desc": "a",
            "amount": 100
        },
        {
            "name": "a",
            "desc": "b",
            "amount": 10
        }
    ]
}