Function columns

Enumerate columns of grid, returning all the cells in the same column as an array.

for (const col of Grid.As.columns(grid)) {
}
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Use Grid.values to convert into values

for (const value of Grid.values(Grid.As.columns(grid))) {
}
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In the case of jagged arrays, it might be that some rows don't have column as long as its peers. In those cases, it returns PlaceholderCell ({x: NaN, y: NaN}) for those positions.