File Matrix Lookup

Examples The first input line is row col, 1-based; the rest of the input is the file. One output line per matrix, written as KEY=value. Example 1 Example 2 Requirements Inputs consist of a file path or file-like input together with the requested row and col. In the basic form, the file holds a single rectangular matrix; return the entry at matrix[row][col]. For the extension, the file may hold several matrices, with a key or header placed before each matrix's data rows.…