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  • 使用Lambda Expressions列出某数值范围中的偶数
    问题:“想列出11至30整数范围所有偶数”。可以使用Lambda expressions来实现,写一个函数:实作演示,把结果绑定至CheckBoxList控件上:运行结果:  
  • mysql正则表达式使用实例
    Summary: in this tutorial, you will learn how to use MySQL regular expression with the SELECT statement to query data based on complex patterns.Regular expression is a powerful tool that gives you a concise and flexible way to identify strings of text e.g., characters, words…etc based on patterns. For example, you can use regular expressions to search for email, IP address, phone number, social security number or anything that has specific p
  • sphinxql如何得到结果数及show meta的详细说明
    mysql:select count(*) from main_index;但是这个在这里却报语法错误。第一种方法:查文档得:Aggregate functions (AVG(), MIN(), MAX(), SUM()) in column list clause are supported. Arguments to aggregate functions can be either plain attributes or arbitrary expressions. COUNT(*) is implicitly supported as using GROUP BY will add @count column to result set. Explicit support might be added in the future. COUNT(DISTINCT attr) is supported. Currently there can be at most one COUNT(DISTINCT)
  • eclipse删除空行,为了看代码更方便
    eclipse删除空行 如何快速删除代码中的空行,鉴于eclipse可以瞬间搞定。刚知道的。 1.打开源码编辑器 2.使用快捷键Ctrl+f 3.在Find输入框中输入:^\s*\n 3.Replace With输入框的值为空 4.在【Options】选中的"Regular expressions" 5.点击【Replace All】按钮。 6.OK! 就这么简单! 利用正则^\s*\n 就可以

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