To get the length of a 2D array in Java, you can use the length field of the array.
To create a flat list out of a list of lists, you can use the itertools.chain function from the itertools module in the Python standard library.
In Python, you can extract a column from a multi-dimensional array (e.g.
In PHP, you can use the "array_reduce" function to flatten a multi-dimensional array.
To create a two-dimensional array in Java, you can use the following syntax:
A two-dimensional array in Python can be defined using the numpy library.
You can use array_walk_recursive() function in PHP to flatten a multidimensional array.
You can use the built-in list function to create a 2D array (also known as a list of lists) in Python.