...立但多个模块可以用分号隔开同时使用并被合法解 析,以下是 XQuery 中的表达式组成体系: 1) 主要表达式(Primary Expressions):这是 XQuery 的基本单元,包括有字符、变量、函数调用及决定优先级的括弧使用,其中一 个 URL 字符在定义上等价于一个字符串。
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expression: 类型转换运算符(type-casting operators)...主要表达式(primary expressions)主要表达式是最基本的..
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... 4.3 函数成员引用(function member invocation) 5 原始表达式(primary expressions) 5.1 字母(literals) ...
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It used to be somewhat inconvenient to deal with UTF-8 in Rails because Ruby's primary method of dealing with them was through regular expressions.
在Rails上处理utf - 8编码曾经是一件很不方便的事情,这主要是由于Ruby通过正则表达式处理UTF - 8而引起的。
Again an SQL select statement can be built up according to one or more predicates (possibly established from primary keys in the incoming message, as identified by XPath expressions).
同样,可以根据一个或多个谓语构建SQL select语句(根据XPath表达式的确认,还可以根据传入消息的主键建立)。
The primary rationale for lambda expressions is to have a way to express code as data, so that code literals can be passed to libraries that will invoke them at convenient times.
lambda表达式的基本原理是提供了一种将代码表达为数据的方式,从而可以将代码字面量传递至代码库中,以便在方便的时候随时调用。
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