extracting values from an array of nested objects without duplicates

Question

I have my solution for the below usecase but I would like to know whether is any other effective solution for the same.

My Data:

const myArr = [{ data: { studyUId: 'abc', seriesData: [ { seriesUId: "123", modality: "VX"}, { seriesUId: "ef3", modality: "GX"} ] } }, { data: { studyUId: 'fgh', seriesData: [ { seriesUId: "grhg", modality: "VX"}, { seriesUId: "dter", modality: "GX"}, { seriesUId: "tg3", modality: "YX"} ] } }, { data: { studyUId: 'tyb', seriesData: [ { seriesUId: "753", modality: "YX"}] } }, { data: { studyUId: 'fgh', seriesData: [ { seriesUId: "grhg", modality: "VX"}, { seriesUId: "tg3", modality: "YX"} ] } }]; 

My Expected Outputs:

// All the values of `studyUId` without duplicates as an array [ 'abc', 'fgh', 'tyb'] 

// All the values of `seriesUId` without duplicates as an array [ '123', 'ef3', 'grhg', 'dter', 'tg3', '753'] 

My Solution:

const studyArr = [...new Set(myArr.map(el => el.data.studyUId ))]; console.log(studyArr); const seriesArr = [...new Set( myArr.map(el => el.data.seriesData.map(series => series.seriesUId) ).flat() )]; console.log(seriesArr); 

Although I have the solution, I am not sure whether it's the best way to do this!

Is there any better way to improve the solution to make it more efficient in terms of speed & code efficiency?

Any help would be appreciated.