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Grokking the Coding Interview Patterns in JavaScript

Introduction to Matrices

Explore the basics of matrices including their structure as 2D arrays, essential matrix operations like addition, multiplication, transpose, and traversal methods such as row-major, column-major, diagonal, and spiral. Understand how these concepts apply to typical interview problems like rotating images and identifying Toeplitz matrices.

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About the pattern

A matrix is a group of numbers arranged in rows and columns in a rectangular pattern. In computer science, matrixes are represented by 2D arrays with dimensions m×nm \times n, where mm is the number of rows, and nn is the number of columns. Each element in the matrix can be accessed using the array indexes. The first index represents the row, and the second index represents the column. For example, matrix[i][j]matrix[i][j] is an element from the ithi^{th} row and the jthj^{th} column of the matrix.

Matrix transformations are operations performed on matrices that result in a new matrix. There are several types of matrix transformations commonly used in mathematics ...