Extracting array elements and pushing them into the same array can be achieved using ES6

So I have this nested array:

a1 = ['one', 'two', ['three', 'four']];

My goal is to extract the elements 'three' and 'four' from the child array and combine them with the parent array as a single string like so:

a2 = ['one', 'two', 'three, four'];

I'm wondering if there's an ES6 solution for this. And also, please note that there should be a space between 'three' and 'four' in the final array.

Answer №1

To achieve this, utilize the map() method along with conditional implementation of join() for the subarray's values:

   const array = ['apple', 'banana', ['orange', 'grape']];
   const newArray = array.map(item => Array.isArray(item) ? item.join(', ') : item);

   console.log(newArray);

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