Table cell merging: How to locate target cells quickly and efficiently?

Efficient positioning table merge cells: coordinate adjustment method

This article discusses how to quickly and efficiently locate adjacent cell coordinates for merging cells in a table represented by a two-dimensional array. For example, if the cell coordinates (2,0) are known, you need to find the coordinates of adjacent cells in the upper, lower, left and right directions in order to perform the merge operation.

Traditional methods usually require traversing an array to find target cells, which is less efficient. This article proposes a more concise and efficient solution: modifying cell coordinate rules .

We take 1x1 cells as the base coordinate unit. For example, the actual coordinates of cells in the figure that appear to be coordinates (2,0) should be adjusted to (2,1). In this way, when merging cells (2,1) upwards, the coordinates of the upper cell are directly calculated as (1,1), without traversing and searching. Mergers in other directions are also applicable.

This coordinate adjustment method avoids complex array traversal, directly finds the target cell through simple coordinate operations, significantly improves efficiency, and makes the logic of cell merging operations clearer and the code implementation is simpler. It improves the readability and efficiency of the code.

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