listOfLists

listOfLists refers to a data structure where each element within an outer list is itself another list. This creates a nested, hierarchical arrangement of data. Imagine a spreadsheet or a grid; a listOfLists can represent such a structure, where the outer list might represent rows and the inner lists represent the columns within each row.

This data structure is commonly used in programming languages like Python, Java, and C++ to organize related collections of items. For example, one might use a listOfLists to store the coordinates of points in a 2D plane, where each inner list contains two elements representing the x and y values. Another application could be representing a game board, with the outer list representing rows and each inner list containing the state of the cells in that row.

Accessing elements within a listOfLists typically requires two indices: the first index specifies which inner list to select, and the second index specifies which element within that inner list to retrieve. For instance, in Python, `my_list_of_lists[0][1]` would access the second element of the first inner list. The flexibility of listOfLists allows for dynamic resizing of both the outer list and the inner lists, making it a versatile tool for managing collections of data.