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Add table.key_value_swap (#9248)

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HybridDog 2020-01-04 15:44:48 +01:00 committed by sfan5
parent 3ad92baa9c
commit f9c7e46a34
2 changed files with 11 additions and 0 deletions
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9
builtin/common/misc_helpers.lua
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@ -575,6 +575,15 @@ function table.insert_all(t, other)
end end
function table.key_value_swap(t)
local ti = {}
for k,v in pairs(t) do
ti[v] = k
end
return ti
end
-------------------------------------------------------------------------------- --------------------------------------------------------------------------------
-- mainmenu only functions -- mainmenu only functions
-------------------------------------------------------------------------------- --------------------------------------------------------------------------------

2
doc/lua_api.txt
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@ -2902,6 +2902,8 @@ Helper functions
* `table.insert_all(table, other_table)`: * `table.insert_all(table, other_table)`:
* Appends all values in `other_table` to `table` - uses `#table + 1` to * Appends all values in `other_table` to `table` - uses `#table + 1` to
find new indices. find new indices.
* `table.key_value_swap(t)`: returns a table with keys and values swapped
* If multiple keys in `t` map to the same value, the result is undefined.
* `minetest.pointed_thing_to_face_pos(placer, pointed_thing)`: returns a * `minetest.pointed_thing_to_face_pos(placer, pointed_thing)`: returns a
position. position.
* returns the exact position on the surface of a pointed node * returns the exact position on the surface of a pointed node