(Original) cocos2d-x 3.0 + Lua learning and working (4): common functions (2): Check

The functions here are mainly used for checking operations. Reference: quick_cocos.

 

Xingyue's contribution ~~~

 

--[[-- 检查并转换为数值，转换失败则返回 0-- @param value 要检查并转换的值-- @param base 进制，默认为十进制-- @return number 返回的数值--]]function checkNumber( value, base )    return tonumber( value, base ) or 0end--[[-- 检查并转换为布尔值， 除了nil和false，其他任何值返回true-- @parame value 要检查的值-- @return boolean 返回布尔值--]]function checkBool( value )    return ( value ~= nil and value ~= false )end--[[-- 检查并转换为整数，转换失败则返回 0-- @param value 要检查的值-- @return integer 返回整数--]]function checkInt( value )    return math.floor( checkNumber( value ) )end--[[-- 检查是否是一个表格，如果不是则返回一个空表格-- @param value 要检查的值-- @return table 返回一个表格--]]function checkTable( value )    if type( value ) ~= "table" then        value = {}    end        return valueend--[[-- 如果表格中指定 key 的值为 nil，或者输入值不是表格，返回false，否则返回true-- @param hashTable 要检查的表格-- @param key 要检查的键名-- @return boolean 返回布尔值--]] function isSet( hashTable, key )    local t = type( hashTable )    return ( t == "table" or t == "userdate" ) and hashTable[key] ~= nilend

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(Original) cocos2d-x 3.0 + Lua learning and working (4): common functions (2): Check