How do I handle empty arrays in JavaScript?

How do I handle empty arrays in JavaScript?

You can check if an array is empty by using the length property. For example, if (array.length === 0) {...}.

What if I want to return a default value when the array is empty?

You can use a conditional operator: return array.length ? array : defaultValue;.

Are there any methods to filter out empty arrays from an array of arrays?

Yes, you can use the filter method: arrayOfArrays.filter(arr => arr.length > 0); to remove empty arrays.

Can I use optional chaining with arrays?

Yes, optional chaining can be used to safely access properties of an array, like array?.[0] to get the first element.