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Different types of thread-safe Sets in Java
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1) The CopyOnWriteArraySet is a quite simple implementation - it basically has a list of elements in an array, and when changing the list, it copies the array. Iterations and other accesses which are running at this time continue with the old array, avoiding necessity of synchronization between...
Is this a “good enough” random algorithm; why isn't it used if it's faster?
I made a class called QuickRandom , and its job is to produce random numbers quickly. It's really simple: just take the old value, multiply by a double , and take the decimal part.
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Java or Python for Natural Language Processing [closed]
...s you're heading a project.
Other than NLTK (www.nltk.org), there are actually other libraries for text processing in python:
TextBlob: http://textblob.readthedocs.org/en/dev/
Gensim: http://radimrehurek.com/gensim/
Pattern: http://www.clips.ua.ac.be/pattern
Spacy:: http://spacy.io
Orange: http:/...
PSQLException: current transaction is aborted, commands ignored until end of transaction block
...gnored as a failed SQL statement. You are welcome to fail SQL statements all you want and PostgreSQL won't stop you.
Stay being in a transaction, but when you detect that the first SQL has failed, either rollback/re-start or commit/restart the transaction. Then you can continue failing as many S...
Simple calculations for working with lat/lon and km distance?
...long coordinates are expressed in degrees, while the cos function in most (all?) languages typically accepts radians, therefore a degree to radians conversion is needed.
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Homebrew作者解不出面试题，被Google拒绝 - 创意 - 清泛网 - 专注C/C++及内核技术
...其作者在进入Google的面试中，因解不出一个二叉树翻转的问题，直接被Google拒绝。
Max Howell在Twitter上推文大意如下：
Google：虽然我们90%的工程师都在用你写的Homebrew，但这也并没有什么卵用，你连二叉树翻转都写不出，直接...
最新编程语言Alda：用文本编辑器就能谱曲 - 创意 - 清泛网 - 专注C/C++及内核技术
...多种乐器等。就其现阶段而言，完成基本的乐谱是完全没问题的，不过变调、重复等一些标记还需要后续的功能加入。
Yarwood 撰写了 Alda 使用的具体使用说明，有兴趣的可以点击这里查看，他另外也表示未来将扩展 Alda 的应用...
只有程序员能看懂的笑话 - 轻松一刻 - 清泛网 - 专注C/C++及内核技术
...件工程师参加培训管理人员的课程。老师提出了这样一个问题：“假如你供职的公司是为航空电子设备提供软件的。有一天你乘飞机出差，当你上了飞机后你发现一个牌子上写着这个飞机用的是你的团队开发的Beta版软件，你会...
小偷与程序员 - 轻松一刻 - 清泛网 - 专注C/C++及内核技术
...：你可以走了。
我感到很诧异。
我：为什么问这样的问题？
民警：深夜还在街上走，幸苦又寒酸的样子，不是小偷就是程序员。程序员 小偷
女程序员做个梦，下面的评论惨绝人寰 - 轻松一刻 - 清泛网 - 专注C/C++及内核技术
...的错误。
2楼：谁让你把男朋友设成public的。
6楼：设计问题，应该采用单例模式。
7楼：没做回归测试。
最后可就真的是丧心病狂型了，也是小编不太懂但容易瞎寻思型。
4楼：心真软，就该把他的接口屏蔽掉。//是我想多...