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What is the method of extracting solely the subitems from an array?

asked 2022-09-24 11:00:00 +0000

david gravatar image

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answered 2022-01-19 18:00:00 +0000

nofretete gravatar image

One method to extract solely the subitems from an array is to use the array method "flatMap". The "flatMap" method combines the processing of "map" and "flatten" by applying a transformation function to each element in the array and then flattening the result into a new array. Here is an example code snippet using "flatMap" to extract the subitems from an array:

const items = [
  { id: 1, subitems: ['a', 'b', 'c'] },
  { id: 2, subitems: ['d', 'e', 'f'] },
  { id: 3, subitems: ['g', 'h', 'i'] }
];

const subitems = items.flatMap(item => item.subitems);

console.log(subitems); // ["a", "b", "c", "d", "e", "f", "g", "h", "i"]

In this example, the "flatMap" method iterates over each object in the "items" array and returns a new array containing only the subitems.

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Asked: 2022-09-24 11:00:00 +0000

Seen: 7 times

Last updated: Jan 19 '22