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Qt events and signal/slots
...rived
from the abstract QEvent class, that
represent things that have happened
either within an application or as a
result of outside activity that the
application needs to know about.
Events can be received and handled by
any instance of a QObject subclass,
but they are especially r...
Android Center text on canvas
...
I compared this approach (= center with Paint.descent() and Paint.ascent()) with the approach to center text with Paint.getTextBounds() in my answer below. Paint.descent() and Paint.ascent() do not take into account the actual text. (You can...
What is the most efficient way to store a list in the Django models?
...the root of all evil."
With that firmly in mind, let's do this! Once your apps hit a certain point, denormalizing data is very common. Done correctly, it can save numerous expensive database lookups at the cost of a little more housekeeping.
To return a list of friend names we'll need to create a ...
Are string.Equals() and == operator really same? [duplicate]
... (string) y;
// Now *this* will call ==(string, string), comparing values appropriately
if (xs == ys) // Yes
Equals will go bang if you call it on null, == won't
string x = null;
string y = null;
if (x.Equals(y)) // Bang
if (x == y) // Yes
Note that you can avoid the latter being a problem u...
What is the purpose of Serialization in Java?
...rializing it to another object achieves this goal.
Caching: Really just an application of the above, but sometimes an object takes 10 minutes to build, but would only take 10 seconds to de-serialize. So, rather than hold onto the giant object in memory, just cache it out to a file via serialization...
Android emulator-5554 offline
...
Uninstalling the app from the emulator did the trick for me. But it is the same idea as wiping the data
– james
Mar 28 '18 at 14:18
...
Execute combine multiple Linux commands in one line
...passx; password-gorilla"
But it does not work as I want. I.E., the first app starts but the second starts only when the previous is closed
However, I found that (with only one ampersand):
sh -c "keepassx & password-gorilla"
and it works as I want now...
How to create a custom-shaped bitmap marker with Android map API v2 [duplicate]
I am developing an Android Application where I'm using Google Map API v2. I need to show the user location on a map with custom markers.
...
When is it better to use an NSSet over an NSArray?
I have used NSSets many times in my apps, but I have never created one myself.
11 Answers
...
What's the purpose of META-INF?
...>
<manifest>
<attribute name="Main-Class" value="MyApplication"/>
</manifest>
</jar>
At least, I think that's easy... :-)
The point is that META-INF should be considered an internal Java meta directory. Don't mess with it! Any files you want to includ...