wait_reset (GameMaker Studio)

/// @function   wait_reset([index]);
/// @param      {int|string}    index
/// @author     Lucas Chasteen <lucas.chasteen@xgasoft.com>
/// @copyright  XGASOFT 2018, All Rights Reserved

/*
Resets a timer created with "wait".

If no timer index is specified, all timers will be reset.

Example usage:
    wait_reset("my_timer");
    wait_reset();
*/

//If timer data exists...
if (ds_exists(global.ds_wait, ds_type_map)) {
    if (argument_count > 0) {
        //Reset individual timer, if specified
        if (ds_map_exists(global.ds_wait, argument[0])) {
            ds_map_delete(global.ds_wait, argument[0]);
        }
    } else {
        //Otherwise reset all timers
        ds_map_destroy(global.ds_wait);
        global.ds_wait = -1;
    }
}