Ever since the introduction of iOS, there is iOS development fever across the globe. Many iOS developers & companies are making fortunate out of it. B...
分类:
编程语言 时间:
2014-09-02 19:30:35
阅读次数:
383
Hibernate annotation 多对多:下面测试例子会自动生成一张表:card,这张是bank和user表的映射表。里头是bank_id和user_id两个组合字段。如果想在这张映射表中加入额外的字段,那么hibernate似乎无法做到。因为这需要把多对多写成两个一对多的关系。事实上这样加...
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系统相关 时间:
2014-09-02 19:27:25
阅读次数:
233
Description
Josephina is a clever girl and addicted to Machine Learning recently. She pays much attention to a method called Linear Discriminant Analysis, which has many interesting properties.
I...
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其他好文 时间:
2014-09-02 17:52:25
阅读次数:
296
1613. For Fans of Statistics
Time limit: 1.0 second
Memory limit: 64 MB
Have you ever thought about how many people are transported by trams every year in a city with a ten-million populati...
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其他好文 时间:
2014-09-02 14:10:14
阅读次数:
252
Crazy Search
Time Limit: 1000MS
Memory Limit: 65536K
Total Submissions: 23168
Accepted: 6513
Description
Many people like to solve hard puzzles some of which may le...
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其他好文 时间:
2014-09-02 12:27:34
阅读次数:
208
两个model,Product and Category;彼此之间有has_and_belongs_to_many的关系;期望在编辑project时,同时编辑project与category之间的关系;编辑project的界面如下:
添加 checkboxes
check_box and check_box_tag方法均可向form中添加checkboxes;由于需要重写check...
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其他好文 时间:
2014-09-01 22:46:33
阅读次数:
262
Vertica “ERROR: Too many ROS containers exist”...
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其他好文 时间:
2014-09-01 09:21:23
阅读次数:
340
明明两道很简单的题目,但是因为不细(zhi)心(dao),就错了。
Too young too simple~╮(╯▽╰)╭...
分类:
编程语言 时间:
2014-09-01 00:32:22
阅读次数:
237
3 Publish/Subscribe
Sending messages to many consumers at once
Python | Java | Ruby | PHP| C#
Publish/Subscribe
(using the .NET Client)
前面的教程我们已经学习了如何创建工作队列,工作队列背后的假设是每一个任务都被准确地递送...
分类:
Web程序 时间:
2014-08-31 22:58:12
阅读次数:
301
LeetCode: Unique Binary Search TreesGiven n, how many structurally unique BST's (binary search trees) that store values 1...n? For example,Given n = 3...
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其他好文 时间:
2014-08-31 22:41:31
阅读次数:
361