Module:Shared: Difference between revisions

Module:Shared (view source)

503 bytes removed , 17 September 2020

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@@ Line 234: / Line 234: @@
 end
--- copies the contents of a variable; for copying tables recursively
+-- copies the contents of a variable; handy for when you might want to modify an object taken from a data file
--- source: http://lua-users.org/wiki/CopyTable
+-- or any other read-only variable
--- pre : orig is the original value
+-- Stolen from https://gist.github.com/tylerneylon/81333721109155b2d244
--- post: returns a copy of the original table if orig is of type
+function p.clone(orig)
---      table, including all children tables but not metatables;
+     if type(obj) ~= 'table' then return obj end
---      otherwise returns whatever is contained in orig
+    local res = {}
-function p.deepCopy(orig)
+    for k, v in pairs(obj) do res[clone(k)] = clone(v) end
-     local orig_type = type(orig)
+     return res
-    local copy
-    if orig_type == 'table' then
-        copy = {}
-        for orig_key, orig_value in next, orig, nil do
-            copy[p.deepCopy(orig_key)] = p.deepCopy(orig_value)
-        end
-        -- cannot copy metatables of tables loaded in by mw.loadData();
-        -- stack overflow error if you uncomment the statement below
-        -- setmetatable(copy, p.deepCopy(getmetatable(orig)))
-    else -- number, string, boolean, etc
-        copy = orig
-    end
-     return copy
 end
 return p