ES6RestAndUnsetOmit.ts

const omit = (originalObject = {}, keysToOmit = []) => {
    const clonedObject = { ...originalObject };
  
    for (const path of keysToOmit) {
        _.unset(clonedObject, path)
    }

    return clonedObject;
} 

const objectFromFrontend = {
  _id: 5,
  data: {
    some: 1,
    useful: 2,
    data: 3
  }
}

const objectToInsertIntoDB = omit(objectFromFrontend, ['_id', 'data.some']);

console.log(objectToInsertIntoDB)
/**
* {
*   data: {
*    useful: 2,
*    data: 3
*  }
* }
*/

console.log(objectFromFrontend)
/**
* {
*   _id: 5,
*   data: {
*    useful: 2, // NOTE: our ORIGINAL object has also had its data.some property removed
*    data: 3
*  }
* }
*/

Neat stuff, good article, thanks!

Thanks. And thanks for reading. I actually just fixed up this gist. There were a few copy and paste errors, and I implemented the for... of loop for improved performance.