• 您了解如何数据定向stdinstdout,如何使用管道以及如何UNIX使用操作符这些有助于编写出强大的脚本更好地捕捉错误,使逻辑简洁清晰。

    Knowing how to redirect data as stdin or stdout, how to use the pipe, and how to use operators in UNIX helps you write more powerful scripts with better error trapping and cleaner logic.

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  • 它们通常(总是)通过对象实例使用对象操作符来调用的。

    They are usuallybut not alwayscalled via an object instance using the object operator.

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  • 可以使用这个操作符一个列表中解出头

    You can also use this operator to extract the head and tail of a list.

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  • 现在通过另一个示例了解为什么可能使用NOT操作符

    Let's look at another example of why we might use the not operator.

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  • 可以使用NOT 操作符访问控制进行进一步限制

    Using the NOT operator, further restriction can be placed on access control.

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  • 需要能够通过使用SQLJOIN操作符获得这些信息

    The information needed can be obtained by using the SQL JOIN operator.

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  • 可以使用+操作符连接多个字面值

    To concatenate multiple String literals, use the + operator.

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  • DB 2使用XSCAN操作遍历XML文档需要,还计算谓词提取文档片断

    DB2 USES the XSCAN operator to traverse XML document trees and, if needed, to evaluate predicates and extract document fragments and values.

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  • 使用PEARDB模块pdo抽象一个价值在于可以sql语句使用操作符

    The other value in using the abstraction layers of the PEAR DB module and PDO is that you can use the? Operator in your SQL statements.

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  • 可以使用通配和取反操作符

    You can use wildcards, along with the not operator,!, allowing for complex selection criteria.

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  • 或者还是使用“|”操作符command输出可以成为一个程序标准输入,如下所示。

    Or, the command's output can become the standard input for another program, again using the "|" operator like this.

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  • 可以通过使用Boolean AND操作符两个查询限制组合查询中。

    These two query restrictions are combined in this query by using the Boolean AND operator.

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  • 清单6中,可以看到组合集合(使用+操作符)访问成员(通过[position])多么容易没有什么值得操心东西

    In Listing 6, you can see how easy it is to combine collections (using the + operator) and access members (via [position]) — and do so without the fear of things blowing up on you!

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  • summarize方法通过Dictionary实例使用对象操作符调用的。

    The summarize method is invoked via a Dictionary instance using the object operator.

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  • 使用dot操作符可以访问设置hash中的每个属性(参见清单2)。

    Each attribute in the hash can be accessed or set using the dot operator (as shown in Listing 2).

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  • 可以使用. .操作符来指定整形范围

    You can specify ranges of integers using the.. operator like so.

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  • 拥有构造函数之后,可以使用new操作符创建对象了,如下所示

    Once I have a constructor function, I can use the new operator to create objects, as shown below

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  • 使用site: ”操作符可以指定网站搜索

    Use the "site:" operator to search only within a certain website.

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  • 因此判断某个是否是dictionary中的应该使用in操作符检查这个是否调用keys方法返回键值列表中。

    Therefore, to determine if a value is a key within a dictionary, you use the in operator to test whether the key is in the list of key values returned by calling the keys method.

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  • 注意如何使用 <<操作符代替add()方法

    Notice how you can use the << operator instead of the add() method.

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  • 通过awk语句中使用NOT操作符可以指定应该提取哪些记录

    By using the NOT operator with awk, you can specify what records should NOT be extracted from the report.

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  • 下面通过一个示例看看使用NOT操作符sugroups效果

    Let's look at an example at how sugroups using the NOT operator might be effective.

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  • 可以使用Transform操作符调节ForEach操作结果

    A Transform operator can be used to modulate the result of the ForEach operation.

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  • 使用查询需要使用SQL操作符嵌入式查询布尔表达式组合在一起。

    To use a table subquery, you need to use an SQL operator to combine the embedded query with a Boolean expression.

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  • 后面示例使用这些操作符

    The following examples use these operators.

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  • 这样情况使用更多选择匹配,需要搜索关键词使用强制操作(+)式的逻辑操作符AND)。

    To get a more selective match for such cases, use either the enforce operator (+) or an explicit Boolean operator (AND) in the keyword search.

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  • 如果以前文章(参见参考资料),注意喜欢使用逻辑操作符而不是编写代码

    If you've read any of my previous articles (see Resources), you'll notice that I favor logical operators over writing several lines of code.

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  • 操作访问方法结合使用可以指定创建索引优化查询使用操作

    An operator class is used in conjunction with the access method to specify the operators used for building the index and during query optimization.

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  • 可以按照与其他操作相同格式使用比较测试操作符

    You use the same format on comparison test operators as other operators.

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  • 如果指定索引名的话,将对特定xml索引使用XISCAN操作符请求一个访问计划

    If specified, it requests an access plan using an XISCAN operator over this particular XML index.

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