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What is the volatile keyword useful for?
...le, which will instruct JVM threads to read the value of volatile variable from main memory and don’t cache it locally.
If a variable is not shared between multiple threads then there is no need to use the volatile keyword.
source
Example usage of volatile:
public class Singleton {
private...
Force browser to clear cache
...use no-store instead. This directive is not effective in preventing caches from storing your response." But when I searched this page for "no-store", it seems nobody mentioned it. I must be misunderstanding something, what is it?
– Matt Groth
Jun 27 at 5:08
...
JavaScript OOP in NodeJS: how?
...thod borrowing" instead of vertical inheritance. You don't need to inherit from a "class" to use its method on your class. For instance:
var method = List.prototype;
function List() {
}
method.add = Array.prototype.push;
...
var a = new List();
a.add(3);
console.log(a[0]) //3;
...
How can jQuery deferred be used?
...se I can think of is in caching AJAX responses. Here's a modified example from Rebecca Murphey's intro post on the topic:
var cache = {};
function getData( val ){
// return either the cached value or jqXHR object wrapped Promise
return $.when(
cache[ val ] ||
$.ajax('/fo...
How to remove the left part of a string?
...
time-travelling much ? ;-) from PEP 596 -- Python 3.9 Release Schedule: 3.9.0 final: Monday, 2020-10-05
– ssc
Jun 7 at 10:21
2
...
Install gitk on Mac
...blem and solved it as follows:
Download the official git package for Mac from http://git-scm.com/download/mac
Install the package. This places all the binaries in /usr/local/git/bin.
Optionally run the included script to make gitk accessible outside of terminals
Either add /usr/local/git/bin to yo...
How to list all installed packages and their versions in Python?
...uce the same output as pip freeze by calling:
pip list
Note
The output from pip list is formatted differently, so if you have some shell script that parses the output (maybe to grab the version number) of freeze and want to change your script to call list, you'll need to change your parsing code...
I am getting Failed to load resource: net::ERR_BLOCKED_BY_CLIENT with Google chrome
...
These errors are usually generated from an ad blocking plugin, such as Adblock Plus. To test this use either a different browser or uninstall the ad blocking plugin (right clicking the extension by the URL bar and clicking "Remove from Chrome...").
There is a...
How do you add a timer to a C# console application
...ctor to do some thing like that.
We can see this modification in the code from the same book CLR Via C# Third Ed.
using System;
using System.Threading;
public static class Program {
public static void Main() {
// Create a Timer object that knows to call our TimerCallback
// method...
AngularJS performs an OPTIONS HTTP request for a cross-origin resource
...ates that browsers
"preflight" the request, soliciting supported methods from the server
with an HTTP OPTIONS request header, and then, upon "approval" from
the server, sending the actual request with the actual HTTP request
method. Servers can also notify clients whether "credentials"
(i...