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expressions

很多同学在进行编程学习时缺乏系统学习的资料。本页面基于expressions内容，从基础理论到综合实战，通过实用的知识类文章，标准的编程教程，丰富的视频课程，为您在expressions相关知识领域提供全面立体的资料补充。同时还包含 e4a、each、each的用法的知识内容，欢迎查阅！

expressions相关知识

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