lua学习笔记14：字符串分割

-----------------------------------------------------------------------
-- des：字符串分割
-- arg：str-要被分割的字符串 ,char-分割字符 
-- log: add by 寒风 2014/11/13
-----------------------------------------------------------------------
function getTabBySplitString(str, char)
	if (str == "" or not str or char == "" or not char) then
		return
	end

	local subStrTab = {}
	while(true) do 
		local pos = string.find(str, char)
		if (not pos) then
  			subStrTab[#subStrTab + 1] = str
			break
		end
		local subStr = string.sub(str, 1, pos-1)
		subStrTab[#subStrTab + 1] = subStr
		local endPos = string.len(str)
		str = str.sub(str, pos+1, endPos)
	end

	return subStrTab
end