Efficiently Manipulating Arrays in JavaScript

After reading a .csv file and saving it to an array, I encountered the following array structure:

var data = [["abc;def"],["ghi;jkl"], ...]

The strings within the nested arrays are separated by semicolons. In order to work with this data more effectively, I need to split these strings at the semicolons to achieve the desired structure:

var data = [["abc", "def"], ["ghi", "jkl"]].

While I could loop through the array and manually split each string, there might be a better way to accomplish this task. I attempted the following approach:

var dataFormatted = data.forEach((row :Array<String>)=> {
    return row[0].split(";");
});

Unfortunately, executing this code results in "dataFormatted" being undefined. Is there a solution to achieve my goal using this method?

Answer №1

Utilize the Array#map method.

let data = [["abc;def"], ["ghi;jkl"]];
let res = data.map(([x]) => x.split(';'));
console.log(res);

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