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What's the “big idea” behind compojure routes?
I'm new to Clojure and have been using Compojure to write a basic web application. I'm hitting a wall with Compojure's defroutes syntax, though, and I think I need to understand both the "how" and the "why" behind it all.
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Fast permutation -> number -> permutation mapping algorithms
...sition that the first element ends up at, you have n possibilities, so you can describe this with a number between 0 and n-1. For the position that the next element ends up at, you have n-1 remaining possibilities, so you can describe this with a number between 0 and n-2.
Et cetera until you have n ...
Differences and relationship between glActiveTexture and glBindTexture
...ather, glActiveTexture sets the active "texture unit". Each texture unit can have multiple texture targets (usually GL_TEXTURE_1D, 2D, 3D or CUBE_MAP).
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Map Tiling Algorithm
...found in the first square. This means that there in total are 12 different cases we must distinguish between.
Now, looking at one edge tile we can determine which way the boundary turns by looking at its four closest neighbour tiles. Marking an edge tile with X just as above we have the following s...
How would Git handle a SHA-1 collision on a blob?
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I did an experiment to find out exactly how Git would behave in this case. This is with version 2.7.9~rc0+next.20151210 (Debian version). I basically just reduced the hash size from 160-bit to 4-bit by applying the following diff and rebuilding git:
--- git-2.7.0~rc0+next.20151210.orig/block-...
Daylight saving time and time zone best practices [closed]
...nown as Zulu or Z time.)
If instead you choose to persist a time using a local time value, include the local time offset for this particular time from UTC (this offset may change throughout the year), such that the timestamp can later be interpreted unambiguously.
In some cases, you may need to sto...
What is state-of-the-art for text rendering in OpenGL as of version 4.1? [closed]
...y different ballpark. The results are truly stunning, it is as fast as you can get, and effects such as glow are trivially easy to add, too. Also, the technique can be downgraded nicely to older hardware, if needed.
See the famous Valve paper for the technique.
The technique is conceptually simila...
What would cause an algorithm to have O(log n) complexity?
... from? However, it turns out that there's several different ways that you can get a log term to show up in big-O notation. Here are a few:
Repeatedly dividing by a constant
Take any number n; say, 16. How many times can you divide n by two before you get a number less than or equal to one? For...
Win32汇编--使用MASM - C/C++ - 清泛网 - 专注C/C++及内核技术
...的语言，总是有基本的源程序结构规范。下面以经典的Hello World程序为例，展示一个C语言、DOS汇编...使用MASM
Win32汇编源程序的结构
任何种类的语言，总是有基本的源程序结构规范。
下面以经典的Hello World程序为例，展示一...
Callback functions in C++
In C++, when and how do you use a callback function?
10 Answers
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