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Add table.shuffle (#8299)
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@ -576,6 +576,20 @@ function table.key_value_swap(t)
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end
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end
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function table.shuffle(t, from, to, random)
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from = from or 1
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to = to or #t
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random = random or math.random
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local n = to - from + 1
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while n > 1 do
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local r = from + n-1
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local l = from + random(0, n-1)
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t[l], t[r] = t[r], t[l]
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n = n-1
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end
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end
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--------------------------------------------------------------------------------
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--------------------------------------------------------------------------------
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-- mainmenu only functions
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-- mainmenu only functions
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--------------------------------------------------------------------------------
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--------------------------------------------------------------------------------
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@ -2925,6 +2925,13 @@ Helper functions
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find new indices.
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find new indices.
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* `table.key_value_swap(t)`: returns a table with keys and values swapped
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* `table.key_value_swap(t)`: returns a table with keys and values swapped
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* If multiple keys in `t` map to the same value, the result is undefined.
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* If multiple keys in `t` map to the same value, the result is undefined.
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* `table.shuffle(table, [from], [to], [random_func])`:
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* Shuffles elements `from` to `to` in `table` in place
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* `from` defaults to `1`
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* `to` defaults to `#table`
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* `random_func` defaults to `math.random`. This function receives two
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integers as arguments and should return a random integer inclusively
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between them.
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* `minetest.pointed_thing_to_face_pos(placer, pointed_thing)`: returns a
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* `minetest.pointed_thing_to_face_pos(placer, pointed_thing)`: returns a
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position.
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position.
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* returns the exact position on the surface of a pointed node
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* returns the exact position on the surface of a pointed node
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