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ds_grid_swap_columns

$$\mathbf{G} = \begin{array}{|c|c|c|c|} \hline \color{#F80}A&B&\color{#C8F}C&D \\\hline \color{#F80}E&F&\color{#C8F}G&H \\\hline \color{#F80}I&J&\color{#C8F}K&L \\\hline \color{#F80}M&N&\color{#C8F}O&P \\\hline \end{array} \qquad f(\mathbf{G},0,2) = \begin{array}{|c|c|c|c|} \hline \color{#C8F}C&B&\color{#F80}A&D \\\hline \color{#C8F}G&F&\color{#F80}E&H \\\hline \color{#C8F}K&J&\color{#F80}I&L \\\hline \color{#C8F}O&N&\color{#F80}M&P \\\hline \end{array}$$

ds_grid_swap_columns(id,col1,col2)
Exchanges the contents of two entire grid columns.
COPY/// ds_grid_swap_columns(id,col1,col2)
//
//  Exchanges the contents of two entire grid columns.
//
//      id          grid data structure, real
//      col1        1st column of the exchange, real
//      col2        2nd column of the exchange, real
//
/// GMLscripts.com/license
{
    var i, temp;
    i = 0;
    repeat (ds_grid_height(argument0)) {
        temp = ds_grid_get(argument0, argument1, i);
        ds_grid_set(argument0, argument1, i, ds_grid_get(argument0, argument2, i));
        ds_grid_set(argument0, argument2, i, temp);
        i += 1;
    }
    return 0;
}

Contributors: Quimp

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