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How to pass objects to functions in C++?
... as a std::optional (boost::optional for older std libs), and aliasing is done fine by reference.
C++11's move semantics make passing and returning by value much more attractive even for complex objects.
Rules of thumb for C++03:
Pass arguments by const reference, except when
they are to be change...
SecurityException: Permission denied (missing INTERNET permission?)
... the requirement and from developer standpoint is all that's needed to be done to be able to do networking. Moreover, since permissions are shown to the user during installation, the fact your app ended installed on user's device means s/he granted what you asked for (otherwise installation is cance...
Reading large text files with streams in C#
...ere
}
}
All up about 9 different methods were bench marked, but that one seem to come out ahead the majority of the time, even out performing the buffered reader as other readers have mentioned.
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Android – Listen For Incoming SMS Messages
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use Intents.SMS_RECEIVED_ACTION instead of the hard-coded one.
– Ahmad Kayyali
Dec 3 '13 at 7:13
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How do I find the duplicates in a list and create another list with them?
...vious what not seen.add(x) is doing (the set add() method always returns None, hence the need for not).
To compute the list of duplicated elements without libraries:
seen = {}
dupes = []
for x in a:
if x not in seen:
seen[x] = 1
else:
if seen[x] == 1:
dupes.ap...
Standard concise way to copy a file in Java?
...py a file in Java involves opening streams, declaring a buffer, reading in one file, looping through it, and writing it out to the other steam. The web is littered with similar, yet still slightly different implementations of this type of solution.
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Why is “if not someobj:” better than “if someobj == None:” in Python?
...est, Python try to convert the object to a bool value if it is not already one. Roughly, we are asking the object : are you meaningful or not ? This is done using the following algorithm :
If the object has a __nonzero__ special method (as do numeric built-ins, int and float), it calls this method...
c++ boost::multi_index composite keys efficiency - c++1y / stl - 清泛IT社区，为创新赋能！
...e. sorting is performed by the first key, then the second key if the first one is equal, etc". Does this mean that the structure is stored such that a lookup for a specific 2-part composite key will take O(n=1) time, i.e. is the container sorted such that there is a pointer directly to each ite...
A Java collection of value pairs? (tuples?)
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The Pair class is one of those "gimme" generics examples that is easy enough to write on your own. For example, off the top of my head:
public class Pair<L,R> {
private final L left;
private final R right;
public Pair(L left, R ...
Defining a percentage width for a LinearLayout? [duplicate]
...s 0.15, 0.70, 0.15. Then add your buttons to the second RelativeLayout(the one with weight 0.70).
Like this:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:id="@+id/layoutContainer" an...