Extracts the first color found if exists

Parse action string to action name and its arguments.

Map action to the corresponding page

Create a new session and reset environment variables

Creates a log file and logging object for the corresponding session ID

开始游戏

* Checks a node for validity as a Sizzle context * @param {Element|Object=} context * @returns {Element|Object|Boolean} The input node if acceptable

按照成员变量定义顺序转成 JSON 样例： { "winner": winner, "players": [ player1, player2,

Return a string visualizing the tree structure.

向标准输出里写msg