What are jagged arrays and how can I use them effectively?

What are jagged arrays and how can I use them effectively?

Jagged arrays are arrays of arrays where each sub-array can have different lengths. They are useful for representing data that doesn't fit into a rectangular structure.

Can you give me an example of a jagged array in Python?

Sure! In Python, you can create a jagged array like this: jagged_array = [[1, 2, 3], [4, 5], [6]]. Here, the first sub-array has 3 elements, the second has 2, and the last has 1.

What are the advantages of using jagged arrays over regular 2D arrays?

Jagged arrays save memory by allowing you to allocate only as much space as needed for each sub-array, unlike regular 2D arrays which require a fixed size.

Are there any performance considerations I should be aware of?

Yes, accessing elements in jagged arrays can be slightly slower than in regular arrays due to the additional level of indirection, but the memory efficiency often outweighs this.