Initial data commit

Task/Deepcopy/Lua/deepcopy-2.lua

@@ -0,0 +1,38 @@
+function deepcopy(o, mode)
+
+  if type(o) ~= 'table' then
+    return o
+  end
+
+  mode = mode and mode:lower() or 'v'
+  local deep_keys   = mode:find('k')
+  local deep_values = mode:find('v')
+
+  local new_t = {}
+  local stack = {o}
+  local tables = {[o] = new_t}
+
+  local function copy(v)
+    if type(v) ~= 'table' then
+      return v
+    end
+    if tables[v] == nil then
+      tables[v] = {}
+      stack[#stack+1] = v
+    end
+    return tables[v]
+  end
+
+  while #stack ~= 0 do
+    local t = table.remove(stack)
+    local new_t = tables[t]
+
+    for k,v in next, t, nil do
+      if deep_keys   then k = copy(k) end
+      if deep_values then v = copy(v) end
+      new_t[k] = v
+    end
+  end
+
+  return new_t
+end