Question 263660 in Javascript Question posted in
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Javascript – how to iterate an object of array and remove duplicate IDs

I am new to JS and continue learning.
I have an below array object which has duplicate ids in it. I want to iterate and create new array which contains only unique id’s

const testobj = {"100": [295, 681, 15220], "257": [295, 681, 1123]}

So the final output I am looking for
const ids = [295, 681,15220, 1123]

I know this is simple but any help will be appreciated.

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2

Answers


  1. 0 
    const testobj = {"100": [295, 681, 15220], "257": [295, 681, 1123]};

let merged = [].concat(...Object.values(testobj)); 
const ids = [...new Set(merged)];

console.log(ids);  // [295, 681, 15220, 1123]

    You can achieve this by iterating over the values of the testobj object, merging them, and then creating a Set to filter out duplicates. Finally, you can convert the Set back into an array.

    const testobj = {"100": [295, 681, 15220], "257": [295, 681, 1123]};

let merged = [].concat(...Object.values(testobj)); 
const ids = [...new Set(merged)];

console.log(ids);  // [295, 681, 15220, 1123]
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  2. 0

    You can try using Set.

    First extract all the arrays of IDs using Object.values(), then flatten these arrays into a single array using [].concat(). Next Set is used to remove the duplicate IDs. Finally [...] (using spread syntax (…)) is used to convert the Set back into an array.

    const testobj = {"100": [295, 681, 15220], "257": [295, 681, 1123]};
const uniqueIds = [...new Set([].concat(...Object.values(testobj)))];
console.log(uniqueIds);
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