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Append an object to a list in R in amortized constant time, O(1)?
...r his answer, as I am new to R and it was nice to have a fully-constructed block of code for doing a performance analysis of the various solutions presented on this page. I am borrowing his code for my analysis, which I duplicate (wrapped in a function) below:
library(microbenchmark)
### Using envi...
How do I use arrays in C++?
... |
+---+
Note that the array itself is still allocated as a single block in memory.
Arrays of pointers
You can overcome the restriction of fixed width by introducing another level of indirection.
Named arrays of pointers
Here is a named array of five pointers which are initialized with a...
“Thinking in AngularJS” if I have a jQuery background? [closed]
...ency injection (DI). If you come from a server-side language (from Java to PHP) you're probably familiar with this concept already, but if you're a client-side guy coming from jQuery, this concept can seem anything from silly to superfluous to hipster. But it's not. :-)
From a broad perspective, DI...
When to use volatile with multi threading?
...ing access to cache in the other core).
A memory barrier instruction just blocks the current thread's loads and/or stores until the store buffer drains; that always happens as fast as possible on its own. (Does a memory barrier ensure that the cache coherence has been completed? addresses this mis...
How to run a program without an operating system?
... bootloader so it's self-contained, if the firmware will only load a small block of code.
Many ARM boards let you do some of those things. Some have boot loaders to help you with basic setup.
Here you may find a great tutorial on how to do a basic operating system on a Raspberry Pi.
Edit:
This ar...
AI2 Keep Awake
...tem. A Notification notification and NotificationChanel for this block is generated by the extension. This is determined by the properties ChannelName, ChannelDescription, NotificationTitle, NotificationText and NotificationIcon. See also section Notification / Notification Chan...
Programmer Puzzle: Encoding a chess board state throughout a game
... this in mind to minimize the use of dashes. Since 1s and 0s (our building blocks) don’t have this problem, it’s not a feature we need to replicate.
Lastly, there are two kinds of rests in Morse code. A short rest (the length of a dot) is used to distinguish between dots and dashes. A longer ga...
What are metaclasses in Python?
...xecuted, Python first executes the body of the class statement as a normal block of code. The resulting namespace (a dict) holds the attributes of the class-to-be. The metaclass is determined by looking at the baseclasses of the class-to-be (metaclasses are inherited), at the __metaclass__ attribute...
ObservableCollection Doesn't support AddRange method, so I get notified for each item added, besides
...ll;
var clusterIndex = -1;
var removedCount = 0;
using (BlockReentrancy())
using (DeferEvents())
{
for (var i = 0; i < count; i++, index++)
{
T item = Items[index];
if (match(item))
{
Items.RemoveAt(index);
...
LINQPad [extension] methods [closed]
... not just link to external webpages.
DumpContainer is a class that adds a block into the output window that can have its contents replaced.
NOTE! Remember to .Dump() the DumpContainer itself in the appropriate spot.
To use:
var dc = new DumpContainer();
dc.Content = "Test";
// further down in th...