大约有 233 项符合查询结果（耗时：0.0110秒） [XML]
How do Trigonometric functions work?
...x5
Range = -pi/4 to +pi/4, degree 7 (4 terms)
Taylor: max error around 3e-7, f(x) = x-x3/6+x5/120-x7/5040
Chebyshev: max error around 1.2e-9, f(x) = 0.999999986x-0.166666367x3+0.008331584x5-0.000194621x7
share
...
Homebrew install specific version of formula?
... checkout 3c86d2b Library/Formula/postgresql.rb
9.3.1 git checkout a267a3e Library/Formula/postgresql.rb
9.3.0 git checkout ae59e09 Library/Formula/postgresql.rb
9.2.4 git checkout e3ac215 Library/Formula/postgresql.rb
9.2.3 git checkout c80b37c Library/Formula/postgresql.rb
9.2.2 git...
How to get JSON response from http.Get
..._/Get+Lucky+(feat.+Pharrell+Williams) artist:map[name:Daft Punk mbid:056e4f3e-d505-4dad-8ec1-d04f521cbb56 url:http://www.last.fm/music/Daft+Punk] image:[map[#text:http://userserve-ak.last.fm/serve/34s/88137413.png size:small] map[#text:http://userserve-ak.last.fm/serve/64s/88137413.png size:medium] ...
Fastest hash for non-cryptographic uses?
...Hashes Compared
1 - crc32b 761331d7
2 - crc32 7e8c6d34
3 - md4 1bc8785de173e77ef28a24bd525beb68
4 - md5 9f9cfa3b5b339773b8d6dd77bbe931dd
5 - sha1 ca2bd798e47eab85655f0ce03fa46b2e6e20a31f
6 - adler32 f5f2aefc
7 - tiger192,3 d11b7615af06779259b29446948389c31d896dee25edfc50
8 - tiger160,3 d11b7615af06...
How to highlight text using javascript
...e type="text/css" media="screen">
.highlight{ background: #D3E18A;}
.light{ background-color: yellow;}
</style>
</head>
<body>
<div id="testDocument">
This is a test
<span> This is another test&l...
Which is faster: while(1) or while(2)?
...t;7) {}
while(3==3 && 4==4) {}
while(8-9 < 0) {}
while(4.3 * 3e4 >= 2 << 6) {}
while(-0.1 + 02) {}
And even to my amazement:
#include<math.h>
while(sqrt(7)) {}
while(hypot(3,4)) {}
Things get a little more interesting with user-defined functions:
int x(void) {
r...
How do you convert a byte array to a hexadecimal string, and vice versa?
..., "32", "33", "34", "35", "36", "37", "38", "39", "3A", "3B", "3C", "3D", "3E", "3F",
"40", "41", "42", "43", "44", "45", "46", "47", "48", "49", "4A", "4B", "4C", "4D", "4E", "4F",
"50", "51", "52", "53", "54", "55", "56", "57", "58", "59", "5A", "5B", "5C", "5D", "5E", "5F",
...
How do you sign a Certificate Signing Request with your Certification Authority?
...c:30:f9:15:83:41:c1:d1:20:fa:85:e7:4f:35:8f:b5:
38:ff:fd:55:68:2c:3e:37
And test its purpose with the following (don't worry about the Any Purpose: Yes; see "critical,CA:FALSE" but "Any Purpose CA : Yes").
$ openssl x509 -purpose -in cacert.pem -inform PEM
Certificate purposes:
SSL clien...
How to avoid reinstalling packages when building Docker image for Python projects?
...ep 4 : ADD . /srv
---> d8ae270eca35
Removing intermediate container 7f003ebc3179
Step 5 : CMD python /srv/run.py
---> Running in 510359cf9e12
---> e42fc9121a77
Removing intermediate container 510359cf9e12
Successfully built e42fc9121a77
Notice how docker didn't use cache during pip install...
How efficient is locking an unlocked mutex? What is the cost of a mutex?
...b.com/CarloWood/ai-statefultask-testsuite/blob/b69b112e2e91d35b56a39f41809d3e3de2f9e4b8/src/mutex_test.cxx
Note that it has a few hardcoded values specific for my box (xrange, yrange and rdtsc overhead), so you probably have to experiment with it before it will work for you.
The graph it produces ...