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JavaScript Object-Oriented JavaScript: Challenge Adding the Game Logic checkForWin() Method Challenge Solution

Swan The Human
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Swan The Human
Full Stack JavaScript Techdegree Student 19,338 Points
Posted by Swan The Human
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Swan The Human
Full Stack JavaScript Techdegree Student 19,338 Points

Why is it this.board.rows -3?

I understand the if statement because it adds to the x or y axis by one to manually iterate through the spaces. but i'm not sure why in the for loop it says -3

1 Answer

Steven Parker
Steven Parker
229,732 Points
Steven Parker
Steven Parker
229,732 Points

There are four separate tests combined together in the conditional expression, one of which looks 3 cells ahead (+3). So the loop must compensate by stopping 3 before the end (-3) to prevent trying to access cells beyond the range.

Steven Parker
Steven Parker
229,732 Points
Steven Parker
Steven Parker
229,732 Points

The board only has 4 columns.