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Why do we need virtual functions in C++?
...eneric food, cats eat rats, all without virtual.
Let's change it a little now so that eat() is called via an intermediate function (a trivial function just for this example):
// This can go at the top of the main.cpp file
void func(Animal *xyz) { xyz->eat(); }
Now our main function is:
Anima...
Difference between jQuery `click`, `bind`, `live`, `delegate`, `trigger` and `on` functions (with an
...nt handler, because it didn't have the class when the event was attached.
Now consider you wanted it to be the other way around: every time a link with class "myLink" appears somewhere on the page, you want it to have the same event handler automatically. This is very common when you have some kind...
How to set or change the default Java (JDK) version on OS X?
...the major version, like:
export JAVA_HOME=`/usr/libexec/java_home -v 1.8`
Now when you run java -version you will see:
java version "1.6.0_65"
Java(TM) SE Runtime Environment (build 1.6.0_65-b14-462-11M4609)
Java HotSpot(TM) 64-Bit Server VM (build 20.65-b04-462, mixed mode)
Add the export JAVA_HO...
Why doesn't the example compile, aka how does (co-, contra-, and in-) variance work?
...on is [A] rather than [+A]).
Note that there is another type of variance known as contravariance. This is very important as it explains why covariance can cause some issues. Contravariance is literally the opposite of covariance: parameters vary upward with subtyping. It is a lot less common par...
ArrayIndexOutOfBoundsException with custom Android Adapter for multiple views in ListView
...
You got 38 upvote for the answer till now so this may be a perfect answer,but please add some more text for explaining the problem and how to resolve it..cause I still cant understand much from this.
– Chirag Patel
Apr 24 '1...
What is the JUnit XML format specification that Hudson supports?
... elements, only one was retained in Jenkins. When creating the xml file, I now concatenate all the failures in one.
Update 2016-11 The link is broken now. A better alternative is this page from cubic.org: JUnit XML reporting file format, where a nice effort has been taken to provide a sensible do...
When to use std::forward to forward arguments?
...nally, you need forward to turn the lvalue-turned x (because it has a name now!) back into an rvalue reference if it was one initially.
You should not forward something more than once however, because that usually does not make sense: Forwarding means that you're potentially moving the argument all...
How do I initialize a TypeScript object with a JSON object
...
@IngoBürk, I know I am asking this question 2 years later but how will this work on array of objects? The sample code above works fine for JSON object. how can it be used for array of objects?
– Pratik Gaikwad
...
Split a python list into other “sublists” i.e smaller lists [duplicate]
...tually it is equivalent, except for a bug where the last batch is missing, now fixed.
– qris
Sep 1 '15 at 8:54
...
What are the differences between the threading and multiprocessing modules?
...rom threading, even if you don't have any shared data, but ignore that for now.)
There are exceptions to this. If your code's heavy computation doesn't actually happen in Python, but in some library with custom C code that does proper GIL handling, like a numpy app, you will get the expected perfor...