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When to use Preorder, Postorder, and Inorder Binary Search Tree Traversal strategies
...s an inherent sequence in the nodes, and you want to flatten the tree back into its original sequence, than an in-order traversal should be used. The tree would be flattened in the same way it was created. A pre-order or post-order traversal might not unwind the tree back into the sequence which w...
When should I use malloc in C and when don't I?
...
char *some_memory = "Hello World";
is creating a pointer to a string constant. That means the string "Hello World" will be somewhere in the read-only part of the memory and you just have a pointer to it. You can use the string as read-only. You cannot make changes to it. Exam...
Qt events and signal/slots
...ass (have a look at your moc_classname.cpp file for more), but most of the interclass communication that you will produce will probably use signals and slots. Signals can get delivered immediately or deferred via a queue (if you are using threads).
A signal can be generated.
...
Why is the .bss segment required?
...he "copy-down" can be run sequentially, hence faster. If it were not split into the two segments then the initialisation would have to skip the RAM spots belonging to the uninitialised variables, so wasting time.
– CL22
May 15 '13 at 16:29
...
Do fragments really need an empty constructor?
...guments (bundle)
For example:
public static final MyFragment newInstance(int title, String message) {
MyFragment f = new MyFragment();
Bundle bdl = new Bundle(2);
bdl.putInt(EXTRA_TITLE, title);
bdl.putString(EXTRA_MESSAGE, message);
f.setArguments(bdl);
return f;
}
And o...
Why must jUnit's fixtureSetup be static?
... @BeforeClass
public static void beforeClass() {
System.out.println("beforeClass");
}
@AfterClass
public static void afterClass() {
System.out.println("afterClass");
}
@Before
public void before() {
System.out.println(this + "\tbefore");
}
...
FixedThreadPool vs CachedThreadPool: the lesser of two evils
...ll time, and queue type.
public static ExecutorService newFixedThreadPool(int nThreads) {
return new ThreadPoolExecutor(nThreads, nThreads,
0L, TimeUnit.MILLISECONDS,
new LinkedBlockingQueue<Runnable>());
}
public st...
MySQL stored procedure vs function, which would I use when?
...and then execute them). (Dynamic SQL in MySQL stored routines)
Some more interesting differences between FUNCTION and STORED PROCEDURE:
(This point is copied from a blogpost.)
Stored procedure is precompiled execution plan where as functions are not. Function Parsed and compiled at runtime. Stor...
How to get the input from the Tkinter Text Widget?
How to get Tkinter input from the Text widget?
7 Answers
7
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Why are joins bad when considering scalability?
...mpared to not joining them, because it's work you need to do live at the point where the user requests it.
But remember the alternative is no longer having two separate pieces of data at all; you have to put the two disparate data points in the same record. You can't combine two different pieces of ...