What are some examples of nested arrays in programming?
Nested arrays are arrays that contain other arrays. For example, in JavaScript, you can have:
let nestedArray = [[1, 2, 3], [4, 5, 6], [7, 8, 9]];
This creates an array with three inner arrays.
Can you give me a practical use case for nested arrays?
Sure! A practical use case for nested arrays is representing a matrix or a grid, like a chessboard. For example:
let chessBoard = [
['R', 'N', 'B', 'Q', 'K', 'B', 'N', 'R'],
['P', 'P', 'P', 'P', 'P', 'P', 'P', 'P'],
['.', '.', '.', '.', '.', '.', '.', '.'],
['.', '.', '.', '.', '.', '.', '.', '.'],
['.', '.', '.', '.', '.', '.', '.', '.'],
['.', '.', '.', '.', '.', '.', '.', '.'],
['p', 'p', 'p', 'p', 'p', 'p', 'p', 'p'],
['r', 'n', 'b', 'q', 'k', 'b', 'n', 'r']
];
How do you access elements in a nested array?
To access elements in a nested array, you use multiple indices. For example, to access the first element of the second inner array in the chessBoard example, you would use:
chessBoard[1][0]; // This returns 'P'
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