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Java复习第四天---IO流
File类测试   //根据指定的文件名和路径创建File对象 File file = new File("myFile.txt"); //file.exists();检测文件是否存在 boolean exists = file.exists(); System.out.println(exists); //按照file对象指定的路径和文件名创建一个新的文件 ...
分类:编程语言   时间:2014-06-05 09:31:59    阅读次数:293
Word Search
Given a 2D board and a word, find if the word exists in the grid.The word can be constructed from letters of sequentially adjacent cell, where "adjace...
分类:其他好文   时间:2014-06-04 20:56:34    阅读次数:343
ProjectEuler 009题
题目:A Pythagorean triplet is a set of three natural numbers, a b c, for which,a2 + b2 = c2For example, 32 + 42 = 9 + 16 = 25 = 52.There exists exactl.....
分类:其他好文   时间:2014-05-31 01:23:03    阅读次数:254
MFC: Create Directory
Original link: How to check if Directory already Exists in MFC(VC++)?MSDN Links:CreateDirectory functionGetFileAttributes functionGetLastError functio...
分类:其他好文   时间:2014-05-29 17:49:25    阅读次数:371
SQL Server判断对象是否存在 (if exists (select * from sysobjects )(转)
1 判断数据库是否存在Sql代码 if exists (select * from sys.databases where name = ’数据库名’) drop database [数据库名] if exists (select * from sys.databases where name =....
分类:数据库   时间:2014-05-26 18:25:37    阅读次数:312
uva 10673 Play with Floor and Ceil
Problem APlay with Floor and CeilInput:standard inputOutput:standard outputTime Limit:1 secondTheoremFor any two integersxandkthere exists two more in...
分类:其他好文   时间:2014-05-26 14:21:44    阅读次数:270
【LeetCode】Word Search
Word SearchGiven a 2D board and a word, find if the word exists in the grid.The word can be constructed from letters of sequentially adjacent cell, wh...
分类:其他好文   时间:2014-05-26 08:21:06    阅读次数:310
同一张表,查询某人最新一条记录
这是一张表的数据记录,现在想查询每个stuname最新的一条全部记录,也就是王鹏、王山、王丽最新的一条记录,查出来的结果在一张表上。 解法:select * from table as a where exists(select 1 from table group by stuname havin...
分类:其他好文   时间:2014-05-26 07:48:25    阅读次数:212
PHP
php在数组中查找指定值是否存在的方法有很多,记得很久以前我一直都是傻傻的用foreach循环来查找的,下面我主要分享一下用php内置的三个数组函数来查找指定值是否存在于数组中,这三个数组分别是 in_array(),array_search(),array_key_exists()。首先分别介绍一...
分类:Web程序   时间:2014-05-25 19:35:54    阅读次数:272
xml cannot be resolved or is not a field
loadHeadersFromResource(R.xml.settings_headers, headers); error: xml cannot be resolved or is not a field, but res/xml/settings_headers.xml exists. Every xml file will have its own ID in R.java,...
分类:其他好文   时间:2014-05-25 16:19:23    阅读次数:206
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