How to Merge Arrays Together in Javascript
There are a number of ways to merge arrays together in JavaScript. You can either use Array.concat:
// Using Array.concat
const array1 = ['📗', '📘'];
const array2 = ['📕', '📙'];
array1.concat(array2);Copied to clipboard!
You can also merge more than two arrays into one using concat in the following way:
// Using Array.concat
const first = ['1️⃣', '2️⃣'];
const second = ['3️⃣', '4️⃣'];
const third = ['5️⃣', '6️⃣'];
// This will result in ['1️⃣', '2️⃣', '3️⃣', '4️⃣', '5️⃣', '6️⃣']
[].concat(first, second, third);Copied to clipboard!
Keep in mind that both solution will return a new array instead of modifying the existing ones. Another way to combine arrays together, is by using destructuring:
// Using the destructuring assignment
const array1 = ['📗', '📘'];
const array2 = ['📕', '📙'];
[...array1, ...array2];Copied to clipboard!
Again, this will create a new array instead of modifying the originals. You can also create a simple function to combine as many arrays as you would like:
function combine() {
const array = [];
[...arguments].forEach(arg => {
array.push(...arg);
});
return array;
}
combine([1]); // returns [1]
combine([1], [2]); // returns [1, 2]
combine([1], [2], [3]); // returns [1, 2, 3]Copied to clipboard!
This works by making use of the arguments object, that is accessible inside functions.
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