大约有 47,000 项符合查询结果（耗时：0.0696秒） [XML]
Difference between classification and clustering in data mining? [closed]
...ere would be a lot of answers because the heights can be 5.0, 5.01, 5.011, etc. But a simple classification like types of light sabers (red,blue.green) would have very limited answers. Infact they can be represented with simple numbers. Red can be 0 , Blue can be 1 and Green can be 2.
If you know ...
In C++, is it still bad practice to return a vector from a function?
...hz 64bit processor. We could do better by parallelizing the computation in order to use all 8 cores (the test above only uses one core at a time, which I have verified by re-running the test while monitoring CPU usage). The best performance is achieved when mem(v) = 16kB, which is the order of magni...
What is the difference between String and string in C#?
...ell-known by C# programmers.
I can say the same about (int, System.Int32) etc..
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How to go about formatting 1200 to 1.2k in java
...dd more suffixes for those really large numbers (quadrillion, quintillion, etc), and the output continues to scale.
– Cypher
Jun 5 '15 at 18:40
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Can I 'git commit' a file and ignore its content changes?
...means, if there are any changes upstream to that file (legitimate changes, etc.) when you do a pull, it will say:
$ git pull
…
From https://github.com/x/y
72a914a..106a261 master -> origin/master
Updating 72a914a..106a261
error: Your local changes to the following files would be overwri...
Convert line-endings for whole directory tree (Git)
...hitespace. You have to use find's -exec instead of piping to avoid quotes, etc.. The dos2unix man page doesn't specify what its behavior is if you invoke it on binary files. If it converts CRLF in binary files, it will corrupt them. See my answer for a safer, albeit longer alternative.
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Why are side-effects modeled as monads in Haskell?
...ally represent the real world, it's just a token to keep the operations in order (the "magic" is that RealWorld is GHC Haskell's only uniqueness type)
– Jeremy List
Oct 30 '15 at 7:15
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Shortest distance between a point and a line segment
...ass vec2 {float x,y;}, essentially, with operators to add, subract, scale, etc, and a distance and dot product function (i.e. x1 x2 + y1 y2).
float minimum_distance(vec2 v, vec2 w, vec2 p) {
// Return minimum distance between line segment vw and point p
const float l2 = length_squared(v, w); /...
Strange out of memory issue while loading an image to a Bitmap object
...veral decoding methods (decodeByteArray(), decodeFile(), decodeResource(), etc.) for creating a Bitmap from various sources. Choose the most appropriate decode method based on your image data source. These methods attempt to allocate memory for the constructed bitmap and therefore can easily result ...
LinkedBlockingQueue vs ConcurrentLinkedQueue
... call poll(), wait a bit if you hadn't found anything, and then poll again etc... leading to delays when a new item comes in, and inefficiencies when it's empty (due to waking up unnecessarily from sleeps).
From the docs for BlockingQueue:
BlockingQueue implementations are designed to be used p...