require "liu"

liu.util = liu.util or {version = 0.1;};
liu.util.Print=function(msg)
  print(msg);
end;

-- Min
liu.util.Min = function(a,b)
  return (a<b and a) or b;
end;

-- Max
liu.util.Max = function(a,b)
  return (a>b and a) or b;
end;

-- IsTrue
liu.util.IsTrue = function(a)
  return (a~=false and a~=nil);
end;

-- 只适用于表: a={"liu","deng","hong"};
-- 不适用于记录型表: b={name="liu", name1="deng", name2="hong"}
-- 等价于ipairs(t)
liu.util.TableIter = function(t)
  local i = 0
  local n = table.getn(t)

  return function ()
    i = i + 1
    if i <= n then return t[i] end
  end
end

liu = liu or {version='0.1';};

-- Examp: liu.Apply(liu, {a=1,b=2});
liu.Apply = function(o, c, defaults)
  if defaults then
    liu.Apply(o, defaults);
  end
  if (o and c and type(c)=="table") then
    for p,v in pairs(c) do
      o[p] = v;
    end
  end
end

liu.Apply(liu, {
  EmptyFn = function() end;

  Num = function(v, defaultValue)
    if(type(v) ~= "number") then
      return defaultValue;
    end
    return v;
  end;

});