ds_list_find_value(id, pos);

参数 描述
id The id of the list to use.
pos The position to look at, where 0 corresponds to the very beginning of the list and the final position is ds_list_size(id)-1.

Returns: Real, String or Undefined


With this function you can check the given list position and the value held within the list for that position will be returned. Note that if you give a position that is outside of the given list size (ie: position 11 in a 10 value list) then the function may return undefined or 0. This is because when you create the list, internally the first few entries in the list are set to 0 to minimize performance issues when initially adding items to the list (although the ds_list_size() function will still return 0 on a newly created list). If you wish to ensure that the list is "truly" empty on create, then you should call ds_list_clear() after creating the list, which will then mean that any values returned for unpopulated list slots will be undefined, which you can then check consistently using the is_undefined() function.


val = ds_list_find_value(list, ds_list_size(list) - 1);

The above code checks the list indexed in the variable "list" at the last position in the list and stores the returned value in the variable "val".

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