reorganize some stuff

modules/core_lib/ext/string.lua

@@ -0,0 +1,26 @@
+function string:split(sep)
+  local t = { }
+  local function helper(word)
+    table.insert(t, word)
+    return ""
+  end
+  if not self:gsub("%w+", helper):find("%S") then
+    return t
+  end
+end
+
+function string:starts(start)
+  return self:sub(1, #start) == start
+end
+
+function string:trim()
+  return self:match('^%s*(.*%S)') or ''
+end
+
+function toboolean(str)
+  str = str:trim()
+  if str == '1' or str == 'true' then
+    return true
+  end
+  return false
+end

modules/core_lib/ext/table.lua

@@ -0,0 +1,34 @@
+function table.dump(t, depth)
+  if not depth then depth = 0 end
+  for k,v in pairs(t) do
+    str = (' '):rep(depth * 2) .. k .. ': '
+    if type(v) ~= "table" then
+      print(str .. tostring(v))
+    else
+      print(str)
+      table.dump(v, depth+1)
+    end
+  end
+end
+
+function table.copy(t)
+  local res = {}
+  for k,v in pairs(t) do
+    res[k] = v
+  end
+  return res
+end
+
+function table.selective_copy(t, keys)
+  local res = { }
+  for i,v in ipairs(keys) do
+    res[v] = t[v]
+  end
+  return res
+end
+
+function table.merge(t, src)
+  for k,v in pairs(src) do
+    t[k] = v
+  end
+end