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One of the most common methods to clean arrays in JS is to assign an empty array to our variable. Let's take a look at it.
In addition to allocating a new empty array, there are other methods available to solve this requirement. However, not all of them offer the same level of efficiency. Here are a few methods along with some data to help you make an informed decision.
array.length property. This effectively removes all elements from the array.
This method is also fast and generally supported, and it can be useful if you need to remove only a particular element of the array instead of clearing it entirely. However, if you're working with really large arrays, it may have some performance concerns because it needs iterating through every element in the array.
You can clear an array by iterating over it using a while loop and removing each element from the array one at a time with the pop() method.
This method is flexible and can be beneficial if additional processing or filtering is required on the elements as they are removed. However, it can be slower than some of the other ways, especially for large arrays.
Utilizing benchmarking to figure out which option offers the best performance is an interesting idea. Here is an example of the many clearing techniques that have been evaluated using a benchmarking tool.