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Default value to a parameter while passing by reference in C++
...st &); // B defaulted
void foo (C const &); // A & B defaulted etc...
It is also possible to redefine default arguments to virtual functions in derived class, which overloading avoids:
class Base {
public:
virtual void f1 (int i = 0); // default '0'
virtual void f2 (int);
inli...
Trying to start a service on boot on Android
...r>
</receiver>
(you don't need the android:enabled, exported, etc., attributes: the Android defaults are correct)
In MyBroadcastReceiver.java:
package com.example;
public class MyBroadcastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, In...
Side-by-side plots with ggplot2
...rint the side effect to a file, specify a device driver (such as pdf, png, etc), e.g.
pdf("foo.pdf")
grid.arrange(plot1, plot2)
dev.off()
or, use arrangeGrob() in combination with ggsave(),
ggsave("foo.pdf", arrangeGrob(plot1, plot2))
This is the equivalent of making two distinct plots using p...
Convert Python program to C/C++ code? [closed]
...Looks like it might be a good replacement for pyinstaller, py2exe, py2app, etc. The --recurse-*** flags are important to set properly though.
– ccpizza
Jul 24 '16 at 8:23
...
C# Sortable collection which allows duplicate keys
...ion
}
You will use it when instancing a new SortedList, SortedDictionary etc:
SortedList<int, MyValueClass> slist = new SortedList<int, MyValueClass>(new DuplicateKeyComparer<int>());
Here int is the key that can be duplicate.
...
Proper use cases for Android UserManager.isUserAGoat()?
...ill lead to a compile error if you're forcing to the following else block, etc.
– djechlin
Nov 15 '12 at 2:01
166
...
How to copy Java Collections list
...ist.set(int,E) thus element 0 will over write element 0 in the target list etc etc. Not particularly clear from the javadocs I'd have to admit.
List<String> a = new ArrayList<>(a);
a.add("foo");
b.add("bar");
List<String> b = new ArrayList<>(a); // shallow copy 'a'
// the ...
Redis cache vs using memory directly
... storing the data in local memory (since it involves socket roundtrips to fetch/store the data). However, it also brings some interesting properties:
Redis can be accessed by all the processes of your applications, possibly running on several nodes (something local memory cannot achieve).
Redis me...
Java's L number (long) specification
...Editor, IDE, looking at the source on the web (review tools, repositories, etc..). IMHO the priority is not to miss the Shift key. Btw. what font do you recommend? I like monospace and it's the default almost in all editors, CLIs etc that I've see and in this font l and 1 (0 and O resp.) are fairly...
How to debug Lock wait timeout exceeded on MySQL?
...-----+-------+
1 row in set (0.01 sec)
You can set it to higher value in /etc/my.cnf permanently with this line
[mysqld]
innodb_lock_wait_timeout=120
and restart mysql. If you cannot restart mysql at this time, run this:
SET GLOBAL innodb_lock_wait_timeout = 120;
You could also just set it for t...