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1.you can't determine whether or not a child object is currently active in the scene by reading itsactiveSelfproperty. Instead, you should use theacti... 阅读全文
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5.5. DictionariesAnother useful data type built into Python is thedictionary(seeMapping Types — dict). Dictionaries are sometimes found in other langu... 阅读全文
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ord(c)Given a string of length one, return an integer representing the Unicode code point of the character when the argument is a unicode object, or t... 阅读全文
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B 树即二叉搜索树:1.所有非叶子结点至多拥有两个儿子(Left和Right);2.所有结点存储一个关键字;3.非叶子结点的左指针指向小于其关键字的子树,右指针指向大于其关键字的子树;如:B树的搜索,从根结点开始,如果查询的关键字与结点的关键字相等,那么就命中;否则,如果查询关键字比结点关键字小,就... 阅读全文