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When and how should I use a ThreadLocal variable?
...eople can abuse it by using it as global variables.
I have copied the text from the mentioned book but code 3.10 is missing as it is not much important to understand where ThreadLocal should be use.
Thread-local variables are often used to prevent sharing in designs based on mutable Singletons or g...
Why should I prefer single 'await Task.WhenAll' over multiple awaits?
...erving the same SynchronizationContext, to further push its benefits aside from the semantics. I found no conclusive documentation, but looking at the IL there are evidently different implementations of IAsyncStateMachine in play. I don't read IL all that well, but WhenAll at the very least appears ...
PHP 5 disable strict standards error
...
Do you want to disable error reporting, or just prevent the user from seeing it? It’s usually a good idea to log errors, even on a production site.
# in your PHP code:
ini_set('display_errors', '0'); # don't show any errors...
error_reporting(E_ALL | E_STRICT); # ...but do log them...
What's the best way of implementing a thread-safe Dictionary?
I was able to implement a thread-safe Dictionary in C# by deriving from IDictionary and defining a private SyncRoot object:
...
Unit testing of private methods [duplicate]
...de (and just the test code) access to the privates, whilst protecting them from everything else.
However, it is preferable to test through the public interface. If your class X has a lot of code in the private member functions then it might be worth extracting a new class Y which is used by the imp...
Does using final for variables in Java improve garbage collection?
...ts are short-lived, the GC is more aggressive about freeing recent garbage from the young generation. If an object survives a collection cycle of the young generation, it gets moved into the old generation (sometimes referred to as the "tenured generation"), which is processed less frequently.
So, ...
How to detect if a function is called as constructor?
... a new instance of* x when calling x as a constructor is indistinguishable from a pre-existing instance of x passed as this when calling x as a function, unless you assign a property to every new object created by x as it is constructed:
function x(y) {
var isConstructor = false;
if (this i...
Why is sed not recognizing \t as a tab?
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Called from a script, that won't work: tabs would be ignored by sh. For example, the following code from a shell script will add $TEXT_TO_ADD, without prepending it by a tabulation: sed "${LINE}a\\ $TEXT_TO_ADD " $FIL...
Click event doesn't work on dynamically generated elements [duplicate]
...n().
Delegated events have the advantage that they can process events from descendant elements that are added to the document at a later time.
Source
Here's what you're looking for:
var counter = 0;
$("button").click(function() {
$("h2").append("<p class='test'>click me " ...
Nodejs send file in response
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Here's an example program that will send myfile.mp3 by streaming it from disk (that is, it doesn't read the whole file into memory before sending the file). The server listens on port 2000.
[Update] As mentioned by @Aftershock in the comments, util.pump is gone and was replaced with a method...