What is the difference between storing data in an array and in an object in terms of memory? Which storage method (two-dimensional array or two-dimensional object) is easier on memory?

From a memory perspective, arrays are usually stored as contiguous blocks of memory, making them more compact and efficient in terms of memory usage. Objects, on the other hand, store key-value pairs, where keys are strings, which adds overhead for storing the keys and the hash table structure.

For storing a table (a two-dimensional structure), a two-dimensional array will be easier on memory because it uses numeric indexing and does not store additional keys. A two-dimensional object, where string keys might be, for example, "row1", "col2", etc., will occupy more memory due to storing the keys and the internal object structure.