CODEWITHSUNDEEP
node.jsaws-lambda
fledgling
fledgling

Reputation: 1051

Convert Nodejs JSON object to List<String>

I am new to NodeJS - I am doing this in a AWS lambda function and have the below JSON object 

{
  "subnetsToUse": [
    {
      "subnetId": "subnet-0g6e5ad78f2841dc9"        },
    {
      "subnetId": "subnet-089e0d4de075664b3"        },
    {
      "subnetId": "subnet-06778539a55adc513"        }
  ]
}

I need to return a list of subnetIds from this. 

subnet-0g6e5ad78f2841dc9,subnet-0g6e5ad78f2841dc9,subnet-0g6e5ad78f2841dc9

Here is what I have tried so far 

var objectKeysArray = Object.keys(subnetsToUse) 
objectKeysArray.forEach(function(subnetId) 
{ var objValue = subnetsToUse[subnetId] })

How do I achieve this in NodeJS.

Upvotes: 0

Views: 898

Answers (1)

Daniel
Daniel

Reputation: 2531

You can use the Array.map or Array.reduce to iterate over the object values and push them into an array for example.

const data = {
  "subnetsToUse": [
    {
      "subnetId": "subnet-0g6e5ad78f2841dc9",
      "availabilityZone": "us-west-2c"
    },
    {
      "subnetId": "subnet-089e0d4de075664b3",
      "availabilityZone": "us-west-2b"
    },
    {
      "subnetId": "subnet-06778539a55adc513",
      "availabilityZone": "us-west-2a"
    }
  ]
}


const mapRes = data.subnetsToUse.map((currentValue) => {
  return currentValue.subnetId;
});

console.log("mapRes", mapRes)


const reduceRes = data.subnetsToUse.reduce((accumulator, currentValue) => {
  accumulator.push(currentValue.subnetId);
  return accumulator;
}, []);


console.log("reduceRes",reduceRes)

Upvotes: 1

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