Dataweave Series for Practice & Interview Part-4

Practice Dataweave here :- Dataweave Playground

Important Note:- First Copy Input, Output, DW Code & Use Json Online Validator, to format the JSON, since medium changes the JSON.

1. Find the Object Inside an array with max/greatest value

Input:-

[{
 "Name": "Shubham",
 "Marks":"95"
}, {
 "Name": "Shubh",
 "Marks":"65"
}, {
 "Name": "SC",
 "Marks":"70"
}]

Output:-

{
 "Name": "Shubham",
 "Marks": "95"
}

Dataweave Code:-

payload maxBy((item)->item.Marks)

2. Difference between “not” & “!” operator

not operator works on the result of overall logical operation but ! works on the first result of logical operation

{
 "x":true,
 "y":false
}

Output:-

{
 "r1": true,
 "r2": false
}

Dataweave Code:-

{
 "r1":not payload.x and payload.y==true,
 "r2":!payload.x and payload.y==true
}

3. XML DateTime to Date Format (Tough One)

Input:-

<placedDate>2022-05-25 00:00:00.0</placedDate>

Output:-

"05/25/2022"

Dataweave Code:-

%dw 2.0
output application/json
var x=(payload.placedDate splitBy(' '))[0]
---
x as Date {format: "yyyy-MM-dd"} as String {format: "MM/dd/yyyy"}

4. Sort an Array

Input:-

[1.1,3,9,1.0]

Output:-

[1.0,1.1,3,9]

Dataweave Code:-

payload orderBy $

5. Extract Number from Escaped Characters

Input:-

"\"999\""

Output:-

999

Dataweave Code:-

payload replace ("\"") with ""

(payload replace /[^a-z0–9A-Z]/ with "") as Number

6. Mask/Hide Values in Dataweave

Input:-

{
 "CreditCard":"4567–1234–9087"
}

Output:-

{
 "CreditCard": "****-****-****"
}

Dataweave Code:-

%dw 2.0
output application/json
import * from dw::util::Values
 - -
payload mask field("CreditCard") with "****-****-****"

7. Extract the URI Parameter/Value from a URL

Input:-

{ 
 "url":"https://xyz.com/api/Emp/999"
}

Output:-

"999"

Dataweave Code:-

%dw 2.0
import * from dw::core::Arrays
output application/json
 - -
slice( payload.url splitBy(/[\/]/), 5,6 )[0]

8. Assign Array Key to Each Array Value

Input:-

{
"Date" : [
"01/05/1991",
"31/01/1995"
]
}

Output:-

{
 "Date": "31/01/1995",
 "Date": "01/05/1991"
}

Dataweave Code:-

payload.Date map ((item, index) -> 
"Date":item
)reduce ($++$$)

9. Break Objects into SubObjects with specified number of key-value pairs

Input:-

{
 "Name": "Shubham",
 "Marks": 90,
 "Name": "AShish",
 "Marks": 50,
 "Name": "Divya",
 "Marks": 80
}

Output:-

[
 {
 "Name": "Shubham",
 "Marks": 90
 },
 {
 "Name": "AShish",
 "Marks": 50
 },
 {
 "Name": "Divya",
 "Marks": 80
 }
]

Dataweave Code:-

%dw 2.0
output application/json
import divideBy from dw::core::Objects
 - -
payload divideBy 2

10. Underscore Space, Dash & Camel-Casing in a String

Input:-

"casualPlaces-required Yes"

Output:-

"casual_places_required_yes"

Dataweave Code:-

%dw 2.0
import * from dw::core::Strings
 - -
underscore(payload)

📢 Check the other Articles in the Dataweave Series:- Dataweave Series for Practice & Interview Part 1–10

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