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Is there a replacement for unistd.h for Windows (Visual C)?
I'm porting a relatively simple console program written for Unix to the Windows platform ( Visual C++ 8.0 ). All the source files include "unistd.h", which doesn't exist. Removing it, I get complaints about misssing prototypes for 'srandom', 'random', and 'getopt'.
I know I can replace the random f...
List all the modules that are part of a python package?
...'t help).
import pkgutil
# this is the package we are inspecting -- for example 'email' from stdlib
import email
package = email
for importer, modname, ispkg in pkgutil.iter_modules(package.__path__):
print "Found submodule %s (is a package: %s)" % (modname, ispkg)
How to import them too? Y...
What is a predicate in c#? [duplicate]
...t way of basically testing if something is true of a given T object.
For example suppose I have a class:
class Person {
public string Name { get; set; }
public int Age { get; set; }
}
Now let's say I have a List<Person> people and I want to know if there's anyone named Oscar in the...
Can't connect to local MySQL server through socket '/tmp/mysql.sock
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理解和配置 Linux 下的 OOM Killer - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
理解和配置 Linux 下的 OOM Killerhow-to-configure-the-linux-oom-killer最近有位 VPS 客户抱怨 MySQL 无缘无故挂掉，还有位客户抱怨 VPS 经常死机，登陆到终端看了一下，都是常见的 Out of memory 问题。这通常是因为某时刻应用程序大量请求 最...
How to center canvas in html5
...anvas center according to the size of the browser window. The canvas is 800x600.
And if the window gets below 800x600, it should resize as well(but that's not very important at the moment)
...
Python: most idiomatic way to convert None to empty string?
...lt-in, but return an empty string when the argument is None, do this:
def xstr(s):
if s is None:
return ''
return str(s)
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How can a Javascript object refer to values in itself? [duplicate]
... it works only if you have a flat obj, like the one in your example. It will not work if you have nested keys.
– Green
Sep 29 '15 at 3:26
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How to output numbers with leading zeros in JavaScript [duplicate]
I can round to x amount of decimal places with math.round but is there a way to round left of the decimal? for example 5 becomes 05 if I specify 2 places
...
Numpy: Get random set of rows from 2D array
... 1],
[0, 4, 1],
[2, 4, 2],
[3, 3, 1]])
>>> idx = np.random.randint(10, size=2)
>>> idx
array([7, 6])
>>> A[idx,:]
array([[0, 4, 1],
[1, 3, 1]])
Putting it together for a general case:
A[np.random.randint(A.shape[0], size=2), :]
For non repl...