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从源代码剖析Mahout推荐引擎 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...义推荐算法的接口
similarity: 定义相似度算法的接口
transforms: 定义数据转换的接口
hadoop: 基于hadoop的分步式算法的实现类
impl: 单机内存算法实现类
从上面的package情况，我可以粗略地看出推荐引擎分为5个主要部分组成：数...
Visual Studio, debug one of multiple threads
... threads. How can I lock it to one thread so the other threads are ignored for debugging?
7 Answers
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The builds tools for v120 (Platform Toolset = 'v120') cannot be found
... Note that your solution may have multiple projects. So, check Properties for all of them by right-click on project (not solution)->Configuration Properties->General->Platform Toolset (this is on VS2013)
– pixel
May 2 '16 at 23:47
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Storing SHA1 hash values in MySQL
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I would use VARCHAR for variable length data, but not with fixed length data. Because a SHA-1 value is always 160 bit long, the VARCHAR would just waste an additional byte for the length of the fixed-length field.
And I also wouldn’t store th...
Are there any side effects of returning from inside a using() statement?
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yes. using is simply syntactic sugar for a try/finally construct
– Mitch Wheat
Mar 3 '10 at 9:09
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How do I resize a Google Map with JavaScript after it has loaded?
...p resizes to the whole screen as I expected but tiles start disappearing before the right hand edge of the page.
6 Answers
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Best explanation for languages without null
...ave selected as my representation admit this state, I must expend mental effort to ensure that the class never gets into this state (perhaps by explicitly coding an invariant). In contrast, if I were using a language with algebraic data types or checked enumerations that lets me define
type DoorSt...
Correct use of flush() in JPA/Hibernate
I was gathering information about the flush() method, but I'm not quite clear when to use it and how to use it correctly. From what I read, my understanding is that the contents of the persistence context will be synchronized with the database, i. e. issuing outstanding statements or refreshing enti...
Is it possible to append to innerHTML without destroying descendants' event listeners?
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Unfortunately, assignment to innerHTML causes the destruction of all child elements, even if you're trying to append. If you want to preserve child nodes (and their event handlers), you'll need to use DOM functions:
function ...
What is “lifting” in Haskell?
I don't understand what "lifting" is. Should I first understand monads before understanding what a "lift" is? (I'm completely ignorant about monads, too :) Or can someone explain it to me with simple words?
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