Anyone can help me with this object? I'm gonna receive a object like this:

NewImage: {
          sourceId: {
            S: "some_string"
          },
          ignored: {
            BOOL: false
          },
          stepFunctionArn: {
            S: "some_string"
          },
          certificate: {
            BOOL: true
          },
          infoNeeded: {
            L: [
              "Array"
            ]
          },
          queuesLinks: {
            M: [
              "Object"
            ]
          },
        }

How can i remove those "S", "BOOL" before each value? I need a object like this:

NewImage: {
  sourceId: "some_string",
  ignored: false,
  stepFunctionArn: "some_string"
  ...
}

I need to make a function that convert that object like i explain above. Any ideas? Thanks for the help : )

Anyone can help me with this object? I'm gonna receive a object like this:

NewImage: {
          sourceId: {
            S: "some_string"
          },
          ignored: {
            BOOL: false
          },
          stepFunctionArn: {
            S: "some_string"
          },
          certificate: {
            BOOL: true
          },
          infoNeeded: {
            L: [
              "Array"
            ]
          },
          queuesLinks: {
            M: [
              "Object"
            ]
          },
        }

How can i remove those "S", "BOOL" before each value? I need a object like this:

NewImage: {
  sourceId: "some_string",
  ignored: false,
  stepFunctionArn: "some_string"
  ...
}

I need to make a function that convert that object like i explain above. Any ideas? Thanks for the help : )

• javascript
• node.js
• object

• do you have only a single property in the most nested objects? – Nina Scholz Commented Nov 19, 2020 at 16:54
• It looks like queuesLinks is supposed to be transformed into an object, but it would need some property names for the values. What's wrong with using regular JSON this looks like someone tried to reinvent it. – James Commented Nov 19, 2020 at 17:05
• its a response of dynamodb stream. – Rafael de Carvalho Commented Nov 19, 2020 at 20:31

4 Answers 4

Just take the values from the nested objects.

const
    data = { sourceId: { S: "some_string" }, ignored: { BOOL: false }, stepFunctionArn: { S: "some_string" }, certificate: { BOOL: true }, infoNeeded: { L: ["Array"] }, queuesLinks: { M: ["Object"] } },
    result = Object.fromEntries(Object
        .entries(data)
        .map(([k, o]) => [k, Object.values(o)[0]])
    );

console.log(result);

.as-console-wrapper { max-height: 100% !important; top: 0; }

You can do this

Object.keys(NewImage).forEach(key=>{
 NewImage[key]=NewImage[key][Object.keys(NewImage[key])[0]];
});
console.log(NewImage);

If you need a new object with the indicated structure you can try this:

const newObj = Object.keys(NewImage).reduce((curr, next) => {
  const key = Object.keys(NewImage[next])[0];
  curr[next] = NewImage[next][key];
  return curr; 
}, {})

This is another approach using reduce method!

const data = {
    sourceId: {
        S: "some_string"
    },
    ignored: {
        BOOL: false
    },
    stepFunctionArn: {
        S: "some_string"
    },
    certificate: {
        BOOL: true
    },
    infoNeeded: {
        L: [
            "Array"
        ]
    },
    queuesLinks: {
        M: [
            "Object"
        ]
    },
};
const newObject = Object.entries(data).reduce(function(accumulator, currentValue) {
  accumulator[currentValue[0]] = Object.values(currentValue[1])[0];

  return accumulator;
}, {});

console.log(newObject)