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What is “loose coupling?” Please provide examples
...t understood the first basic tenet of loose coupling: abstraction. The key from here is to ensure that ABC and XYZ do not depend on any methods or variables of the classes that call them. That allows ABC and XYZ to be completely independent APIs. Or in other words, they are "decoupled" or "loosely c...
Correct idiom for managing multiple chained resources in try-with-resources block?
...er(file))) {
bw.write(text);
}
For me, the best thing coming to Java from traditional C++ 15 years ago was that you could trust your program. Even if things are in the muck and going wrong, which they often do, I want the rest of the code to be on best behaviour and smelling of roses. Indeed, ...
java.io.Console support in Eclipse IDE
...
I assume you want to be able to use step-through debugging from Eclipse. You can just run the classes externally by setting the built classes in the bin directories on the JRE classpath.
java -cp workspace\p1\bin;workspace\p2\bin foo.Main
You can debug using the remote debugger an...
Better way to revert to a previous SVN revision of a file?
... is 854. Then, I'd want to get an older revision - the version of the file from few revision earlier, say revision 851.
Copy would work:
svn copy -r 851 svn+ssh://<repository URL>/l3toks.dtx ./l3toks.dtx
.. however, I can't be bothered grepping for the repo URL :)
Update seemingly might...
AngularJS - Access to child scope
...in a child scope the interpreter will look up the prototype chain starting from the child and continue to the parents until it finds the property, not the other way around.
Check Vojta's comments on the issue https://groups.google.com/d/msg/angular/LDNz_TQQiNE/ygYrSvdI0A0J
In a nutshell: You cann...
How to check if an email address exists without sending an email?
...
VRFY user
You can issue a RCPT, and see if the mail is rejected.
MAIL FROM:<>
RCPT TO:<user@domain>
If the user doesn't exist, you'll get a 5.1.1 DSN. However, just because the email is not rejected, does not mean the user exists. Some server will silently discard requests like t...
Is it possible to implement dynamic getters/setters in JavaScript?
...
2013 and 2015 Update (see below for the original answer from 2011):
This changed as of the ES2015 (aka "ES6") specification: JavaScript now has proxies. Proxies let you create objects that are true proxies for (facades on) other objects. Here's a simple example that turns any pro...
How does collections.defaultdict work?
...igure out what this method means. Can somebody help? Here are two examples from the python docs
15 Answers
...
How can I make a .NET Windows Forms application that only runs in the System Tray?
...new Form1()); line in Program.cs to instead start up a class that inherits from ApplicationContext, and have the constructor for that class initialize a NotifyIcon
static class Program
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThrea...
Determine installed PowerShell version
...
thank you! NB: On my XP where I manually upgraded from v1 Powershell, the actual folder and registry paths (misleadingly?!) reference v1 NOT v2. This is as others here specify, but it was the reason why I was so worried whether I had installed it. My path is ; C:\WINDOWS\sys...