Working with JSON data: including new child elements

Hey there, I'm just starting to work with JSON and TypeScript. I have a JSON object that needs processing, where each child value must be added up to set the parent values as the sum of corresponding attributes from its children.

 "parentValues":[{
 "number1": 0,
 "number2": 0,
 "parentId": 1,
 "childValues": [{
         "number1": 10,
         "number2": 20,
         "childId": 1
     },
     {
         "number1": 30,
         "number2": 40,
         "childId": 2
     }
 ]}]

After processing, it should look like this :

"parentValues":[{
 "number1": 10+30,
 "number2": 20+40,
 "parentId": 1,
 "childValues": [{
         "number1": 10,
         "number2": 20,
         "childId": 1
     },
     {
         "number1": 30,
         "number2": 40,
         "childId": 2
     }
 ]}]
arraysjsontypescript

Answer №1

Consider the following solution where we assume an array named parentValues containing objects:

let parentValues = [{
 "number1": 0,
 "number2": 0,
 "parentId": 1,
 "childValues": [{
         "number1": 10,
         "number2": 20,
         "childId": 1
     },
     {
         "number1": 30,
         "number2": 40,
         "childId": 2
     }
 ]}];


for(let i = 0; i < parentValues.length; i++ ) {
   for(let j = 0; j < parentValues[i]["childValues"].length; j++) {
       parentValues[i].number1 = parentValues[i]["childValues"][j].number1;
       parentValues[i].number2 = parentValues[i]["childValues"][j].number2;
   }
}

The logic is more important than the language used in this scenario.

This solution may not be perfect, but it gets the job done :)

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