How to delete property from spread operator?

Question

I want to delete drugName from the response but it is not happening any idea how to delete property from spread operator ? main.js

  const transformedResponse = transformResponse(response);   const loggerResponse = {...transformedResponse};   delete loggerResponse[drugName];   console.log("LOGGER>>>>", loggerResponse);   logger().info('Drug Price Response=', { ...loggerResponse, memberId: memberId, pharmacyId: pharmacyId }); 

\ data

LOGGER>>>> {     '0': {         isBrand: false,         drugName: 'test drug',         drugStrength: '5 mg 1 5 mg',         drugForm: 'Tablet',     } } 

transformResponse

[{     drugName: 'HYDROCODONE-HOMATROPINE MBR',     drugStrength: '5MG-1.5MG',     drugForm: 'TABLET',     brand: false }] 

Answer 1

You could use Rest syntax in Object Destructuring to get all the properties except drugName to a rest variable like this:

const transformedResponse = [{      drugName: 'HYDROCODONE-HOMATROPINE MBR',      drugStrength: '5MG-1.5MG',      drugForm: 'TABLET',      brand: false  },  {      drugName: 'HYDROCODONE ABC',      drugStrength: '10MG',      drugForm: 'SYRUP',      brand: true  }]    const output = transformedResponse.map(({ drugName, ...rest }) => rest)    console.log(output)

Also, when you spread an array inside {}, you get an object with indices of the array as key and the values of array as value. This is why you get an object with 0 as key in loggerResponse:

const array = [{ id: 1 }, { id: 2 }]  console.log({ ...array })