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What is the difference between sigaction and signal?
...ion() unless you've got very compelling reasons not to do so.
The signal() interface has antiquity (and hence availability) in its favour, and it is defined in the C standard. Nevertheless, it has a number of undesirable characteristics that sigaction() avoids - unless you use the flags explicitly ...
Best way to store date/time in mongodb
... use in your map-reduce jobs, for example.
If you need to, you can easily convert Date objects to and from Unix timestamps1), using the getTime() method and Date(milliseconds) constructor, respectively.
1) Strictly speaking, the Unix timestamp is measured in seconds. The JavaScript Date object mea...
Push Notifications in Android Platform
...hat you need a Google account for your users : which is, I think, a constraint.
– kaffein
Apr 17 '12 at 12:13
33
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How to take a screenshot programmatically on iOS
I want a screenshot of the image on the screen saved into the saved photo library.
20 Answers
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How do I suspend painting for a control and its children?
...o that - SuspendLayout and ResumeLayout aren't enough. How do I suspend painting for a control and its children?
10 Answer...
How to create NS_OPTIONS-style bitmask enumerations in Swift?
In Apple's documentation about interacting with C APIs, they describe the way NS_ENUM -marked C-style enumerations are imported as Swift enumerations. This makes sense, and since enumerations in Swift are readily provided as the enum value type it's easy to see how to create our own.
...
Confusion between factor levels and factor labels
...reatment A etc.
The factor function will look for the values a, b and c, convert them to numerical factor classes, and add the label values to the level attribute of the factor. This attribute is used to convert the internal numerical values to the correct labels. But as you see, there is no label...
Implement touch using Python?
...t simplify the code:
from __future__ import (absolute_import, division, print_function)
import os
if os.path.exists(fname):
try:
os.utime(fname, None) # Set access/modified times to now
except OSError:
pass # File deleted between exists() and utime() calls
# (or no permissi...
How to determine if a type implements a specific generic interface type
...also be done with the following LINQ query:
bool isBar = foo.GetType().GetInterfaces().Any(x =>
x.IsGenericType &&
x.GetGenericTypeDefinition() == typeof(IBar<>));
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imp...
Why malloc+memset is slower than calloc?
...take small allocations (anything from 1 byte to 100s of KB) and group them into larger pools of memory. For example, if you allocate 16 bytes, malloc() will first try to get 16 bytes out of one of its pools, and then ask for more memory from the kernel when the pool runs dry. However, since the pr...