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Local variables in nested functions
..., I know it's going to look horribly convoluted, but please help me understand what's happening.
4 Answers
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How to change string into QString?
...const char* str = "zażółć gęślą jaźń"; // latin2 source file and system encoding
QString qstr = QString::fromLocal8Bit(str);
If you have const char * that's UTF8 encoded then you'll need to use this method:
QString QString::fromUtf8(const char * str, int size = -1)
const char* st...
Rails: Check output of path helper from console
... Rails console, you can call app.post_path. This will work in Rails ~= 2.3 and >= 3.1.0.
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Center a column using Twitter Bootstrap 3
...ach uses Bootstrap's own offset classes so it requires no change in markup and no extra CSS. The key is to set an offset equal to half of the remaining size of the row. So for example, a column of size 2 would be centered by adding an offset of 5, that's (12-2)/2.
In markup this would look like:
&...
Getting value of public static final field/property of a class in Java via reflection
...ssed to the get method is ignored entirely). Otherwise you can use getType and write an appropriate switch as below:
Field f = R.class.getField("_1st");
Class<?> t = f.getType();
if(t == int.class){
System.out.println(f.getInt(null));
}else if(t == double.class){
System.out.println(f....
Spark java.lang.OutOfMemoryError: Java heap space
... suggestions:
If your nodes are configured to have 6g maximum for Spark (and are leaving a little for other processes), then use 6g rather than 4g, spark.executor.memory=6g. Make sure you're using as much memory as possible by checking the UI (it will say how much mem you're using)
Try using more ...
How to convert a dictionary to query string in Python?
...'foo', 'param2': 'bar'})
output: 'pram1=foo&param2=bar'
for python2 and python3 compatibility, try this:
try:
#python2
from urllib import urlencode
except ImportError:
#python3
from urllib.parse import urlencode
...
Most popular screen sizes/resolutions on Android phones [closed]
I understand that Android's developer site provides information on this topic. I have already read the following three pages:
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Where does Visual Studio look for C++ header files?
...a copy of a C++ application from SourceForge (HoboCopy, if you're curious) and tried to compile it.
6 Answers
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Using Chrome, how to find to which events are bound to an element
....865.0 dev. There's an "Event Listeners" section on the Elements panel:
And an "Event Listeners Breakpoints" on the Scripts panel. Use a Mouse -> click breakpoint and then "step into next function call" while keeping an eye on the call stack to see what userland function handles the event. Ide...