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What is a higher kinded type in Scala?

... Let me make up for starting some of this confusion by pitching in with some disambiguation. I like to use the analogy to the value level to explain this, as people tend to be more familiar with it. A type constructor is a type that you can apply to type arguments to "construct"...
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What are the best JVM settings for Eclipse? [closed]

... It is that time of year again: "eclipse.ini take 3" the settings strike back! Eclipse Helios 3.6 and 3.6.x settings alt text http://www.eclipse.org/home/promotions/friends-helios/helios.png After settings for Eclipse Gan...
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How do you round a floating point number in Perl?

...t int() merely truncates toward 0. For rounding to a certain number of digits, sprintf() or printf() is usually the easiest route. printf("%.3f", 3.1415926535); # prints 3.142 The POSIX module (part of the standard Perl distribution) implements ceil(), floor(), and a number of other ma...
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腾讯Tencent开源框架介绍(持续更新) - 开源 & Github - 清泛网 - 专注C/C++及内核技术

...h> #include <stdio.h> #include <stdlib.h> #include <queue> #include "co_routine.h" using namespace std; /** * 本实例是对条件变量的展示,其作用类似于pthread_cond_wait */ struct stTask_t { int id; }; struct stEnv_t { stCoCond_t* cond; queue<stTask_t*> task_queue...
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How to install Java SDK on CentOS?

... there are no available packages, then you may need to download a new repository to search through. I suggest taking a look at Dag Wieers' repo. After downloading it, try the above command again. You will see at least one version of Java packages available for download. Depending on when you read t...
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Why does Javascript's regex.exec() not always return the same value? [duplicate]

... When the regex is global, if you call a method on the same regex object, it will start from the index past the end of the last match. When no more matches are found, the index is reset to 0 automatically. To reset it manually, set the lastIndex property. reg.lastIndex = 0; This can be a v...
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Representing Directory & File Structure in Markdown Syntax [closed]

...ur example structure becomes . +-- _config.yml +-- _drafts | +-- begin-with-the-crazy-ideas.textile | +-- on-simplicity-in-technology.markdown +-- _includes | +-- footer.html | +-- header.html +-- _layouts | +-- default.html | +-- post.html +-- _posts | +-- 2007-10-29-why-every-progra...
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What is the purpose of std::make_pair vs the constructor of std::pair?

... The difference is that with std::pair you need to specify the types of both elements, whereas std::make_pair will create a pair with the type of the elements that are passed to it, without you needing to tell it. That's what I could gather from vari...
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Using mixins vs components for code reuse in Facebook React

I'm beginning to use Facebook React in a Backbone project and so far it's going really well. However, I noticed some duplication creeping into my React code. ...
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Why isn't ProjectName-Prefix.pch created automatically in Xcode 6?

...efix header. Put your imports into the files that need them. Put your definitions into their own files. Put your macros...nowhere. Stop writing macros unless there is no other way (such as when you need __FILE__). If you do need macros, put them in a header and include it. The prefix header was nec...