Create a function

Exercise

Given the following input payload:

[
    [
        5,
        6
    ],
    [
        100,
        12
    ]
]

Write a DataWeave transformation that produces the following output:

123

Which is the result of summing every value across the two Arrays of numbers (5 + 6 + 100 + 12). You are expected to write a function that performs this total sum and works no matter how many elements the two Arrays hold.

Hints

• To get the total sum of the values in a single array, you can use the sum(<Array<Number>>) function.
• To concatenate Arrays (turn the two into one) you can use the ++(<Array<Number>>, <Array<Number>>) function.

---

🔒🔓Show solution

%dw 2.0
output application/json

fun sumar(n1: Array<Number>, n2: Array<Number>): Number = sum(n1 ++ n2)
// Otra forma de hacerlo
// fun sumar(n1: Array<Number>, n2: Array<Number>): Number = sum(n1) + sum(n2)
---
payload[0] sumar payload[1]

Notes:

1. As mentioned in the hint, the sum() function returns the total sum of the values inside a numeric Array, so all that’s left is to add the total of the first Array to the total of the second one.
2. Since ++ concatenates Arrays, we can build a single Array with all the elements and use sum() to get the total.