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Error to install Nokogiri on OSX 10.9 Maverick?
I upgraded my OSX (Lion) to Mavericks and I can't install Nokogiri for my projects.
30 Answers
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Realistic usage of the C99 'restrict' keyword?
...aw it mentioned. I read a brief description, stating that it would be basically a promise from the programmer that the pointer won't be used to point somewhere else.
...
Get a random boolean in python?
... but I found that random.getrandbits(1) to be quite a lot faster. If you really want a boolean instead of a long then
bool(random.getrandbits(1))
is still about twice as fast as random.choice([True, False])
Both solutions need to import random
If utmost speed isn't to priority then random.choic...
enum - getting value of enum on string conversion
...>> member.value
1
You could add a __str__ method to your enum, if all you wanted was to provide a custom string representation:
class D(Enum):
def __str__(self):
return str(self.value)
x = 1
y = 2
Demo:
>>> from enum import Enum
>>> class D(Enum):
...
Positioning MKMapView to show multiple annotations at once
...tations I want to add to my MKMapView (it could 0-n items, where n is generally around 5). I can add the annotations fine, but I want to resize the map to fit all annotations onscreen at once, and I'm not sure how to do this.
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What's the difference between echo, print, and print_r in PHP?
...s, although such usage is rare; echo is slightly faster than print. (Personally, I always use echo, never print.)
var_dump prints out a detailed dump of a variable, including its type and the type of any sub-items (if it's an array or an object). print_r prints a variable in a more human-readable f...
Android: Bitmaps loaded from gallery are rotated in ImageView
When I load an image from the media gallery into a Bitmap, everything is working fine, except that pictures that were shot with the camera while holding the phone vertically, are rotated so that I always get a horizontal picture even though it appears vertical in the gallery.
Why is that and how can...
Detect Browser Language in PHP
... do you say they are one letter? Dutch (nl), Greek (el) and Slovenian (sl) all appear to be two letter: msdn.microsoft.com/en-us/library/ms533052(v=vs.85).aspx
– Peter K.
Nov 19 '12 at 17:35
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Linux bcc tools使用总结（持续更新） - 操作系统(内核) - 清泛网 - 专注IT技能提升
...后，手动Ctrl + C 结束统计，输出此段时间内各自耗时区间的IO事件个数。
默认微秒区间，-m 参数则是毫秒区间。
# /usr/share/bcc/tools/biolatency
Tracing block device I/O... Hit Ctrl-C to end.
^C
usecs : count distribution
...
Linux bcc tools使用总结（持续更新） - 操作系统(内核) - 清泛网 - 专注IT技能提升
...后，手动Ctrl + C 结束统计，输出此段时间内各自耗时区间的IO事件个数。
默认微秒区间，-m 参数则是毫秒区间。
# /usr/share/bcc/tools/biolatency
Tracing block device I/O... Hit Ctrl-C to end.
^C
usecs : count distribution
...