Added dropboxs

expcore/common.lua

@@ -619,4 +619,67 @@ function Common.get_file_path(offset)
     return debug.getinfo(offset+2, 'S').source:match('^.+/currently%-playing/(.+)$'):sub(1, -5)
 end
 
+--[[-- Much faster method for inserting items into an array
+@tparam table tbl the table that will have the values added to it
+@tparam[opt] number start_index the index at which values will be added, nil means end of the array
+@tparam table values the new values that will be added to the table
+@treturn table the table that was passed as the first argument
+@usage-- Adding 1000 values into the middle of the array
+local tbl = {}
+local values = {}
+for i = 1,1000 do tbl[i] = i values[i] = i end
+Common.array_insert(tbl,500,values) -- around 0.4ms
+]]
+function Common.array_insert(tbl,start_index,values)
+    if not values then
+        values = start_index
+        start_index = nil
+    end
+
+    if start_index then
+        local starting_length = #tbl
+        local adding_length = #values
+        local move_to = start_index+adding_length+1
+        for offset = 0, starting_length-start_index do
+            tbl[move_to+offset] = tbl[starting_length+offset]
+        end
+        start_index = start_index-1
+    else
+        start_index = #tbl
+    end
+
+    for offset, item in ipairs(values) do
+        tbl[start_index+offset] = item
+    end
+
+    return tbl
+end
+
+--[[-- Much faster method for inserting keys into a table
+@tparam table tbl the table that will have keys added to it
+@tparam[opt] number start_index the index at which values will be added, nil means end of the array, numbered indexs only
+@tparam table tbl2 the table that may contain both string and numbered keys
+@treturn table the table passed as the first argument
+@usage-- Merging two tables
+local tbl = {}
+local tbl2 = {}
+for i = 1,100 do tbl[i] = i tbl['_'..i] = i tbl2[i] = i tbl2['__'..i] = i end
+Common.table_insert(tbl,50,tbl2)
+]]
+function Common.table_insert(tbl,start_index,tbl2)
+    if not tbl2 then
+        tbl2 = start_index
+        start_index = nil
+    end
+
+    Common.array_insert(tbl,start_index,tbl2)
+    for key, value in pairs(tbl2) do
+        if not tonumber(key) then
+            tbl[key] = value
+        end
+    end
+
+    return tbl
+end
+
 return Common