大约有 47,000 项符合查询结果（耗时：0.0312秒） [XML]
ActiveRecord: size vs count
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edited Jul 10 '12 at 22:15
Jo Liss
22.5k1414 gold badges101101 silver badges150150 bronze badges
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How do I upgrade my ruby 1.9.2-p0 to the latest patch level using rvm?
My current version of ruby is ruby 1.9.2p0 (2010-08-18 revision 29036) [x86_64-darwin10.5.0] but I want to update it to the latest patch level using rvm. How can I do this?
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What does multicore assembly language look like?
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10 Answers
10
Active
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~x + ~y == ~(x + y) is always false?
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edited Jun 20 '12 at 13:47
answered Jun 20 '12 at 2:35
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How to normalize an array in NumPy?
...mpy as np
from sklearn.preprocessing import normalize
x = np.random.rand(1000)*10
norm1 = x / np.linalg.norm(x)
norm2 = normalize(x[:,np.newaxis], axis=0).ravel()
print np.all(norm1 == norm2)
# True
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Fastest way to remove first char in a String
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edited Jul 11 '10 at 7:02
answered Jul 11 '10 at 6:44
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How to open, read, and write from serial port in C?
...ity)
{
struct termios tty;
if (tcgetattr (fd, &tty) != 0)
{
error_message ("error %d from tcgetattr", errno);
return -1;
}
cfsetospeed (&tty, speed);
cfsetispeed (&tty, speed);
tty.c_cflag = (tty.c_...
How is “=default” different from “{}” for default constructor and destructor?
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105
This is a completely different question when asking about constructors than destructors.
If yo...
Find which version of package is installed with pip
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1070
As of pip 1.3, there is a pip show command.
$ pip show Jinja2
---
Name: Jinja2
Version: 2.7.3...
How do I round to the nearest 0.5?
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208
Multiply your rating by 2, then round using Math.Round(rating, MidpointRounding.AwayFromZero), ...