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How to get the directory of the currently running file?
... the playground result is not what you expected is because it is inside a sandbox.
– Gustavo Niemeyer
Jul 21 '15 at 13:51
44
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Using margin:auto to vertically-align a div
...middle because it's not applicable to block-level elements
margin-top:auto and margin-bottom:auto because their used values would compute as zero
margin-top:-50% because percentage-based margin values are calculated relative to the width of containing block
In fact, the nature of document flow and ...
How do I programmatically click a link with javascript?
...r it worked in all browsers I tried, including IE, Safari, Chrome, Firefox and Opera.
– arik
Jan 29 '12 at 17:17
5
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Why rgb and not cmy? [closed]
Seeing as how the three primary colors are cyan, magenta and yellow (CMY), why do monitors and almost all the GUI components out there use red, green and blue (RGB)? (If I'm not mistaken, printers use the CMYK model.)
...
How to access accelerometer/gyroscope data from Javascript?
...o use DeviceOrientation API. This works in most modern browsers on desktop and mobile.
window.addEventListener("deviceorientation", handleOrientation, true);
After registering your event listener (in this case, a JavaScript
function called handleOrientation()), your listener function
per...
How to convert a string to integer in C?
... const char **errstr);
EDIT
You might also be interested in strtoumax and strtoimax which are standard functions in C99. For example you could say:
uintmax_t num = strtoumax(s, NULL, 10);
if (num == UINTMAX_MAX && errno == ERANGE)
/* Could not convert. */
Anyway, stay away from a...
Unique BooleanField value in Django?
...mplish this task, what I've done is override the save method for the model and have it check if any other model has the flag already set (and turn it off).
class Character(models.Model):
name = models.CharField(max_length=255)
is_the_chosen_one = models.BooleanField()
def save(self, *a...
C++: what regex library should I use? [closed]
...
Boost.Regex is very good and is slated to become part of the C++0x standard (it's already in TR1).
Personally, I find Boost.Xpressive much nicer to work with. It is a header-only library and it has some nice features such as static regexes (regexes ...
What's a good way to overwrite DateTime.Now during testing?
... in providing the clock to the class that relies on it, but that could be handled by any number of dependency injection solutions (using an Inversion of Control container, plain old constructor/setter injection, or even a Static Gateway Pattern).
Other mechanisms of delivering an object or method t...
Combine two columns of text in pandas dataframe
I have a 20 x 4000 dataframe in Python using pandas. Two of these columns are named Year and quarter . I'd like to create a variable called period that makes Year = 2000 and quarter= q2 into 2000q2 .
...