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Why 0 is true but false is 1 in the shell?
... if you want to. A lot of APIs and frameworks have a similar convention - functions that succeed return 0 and and those that fail give back an error code describing the particular failure case.
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Express next function, what is it really for?
...listening on port 3000!')
});
If you do
curl http://localhost:3000/user/123
you will see this printed to console:
before request handler
handling request
after request handler
Now if you comment out the call to next() in the middle handler like this:
app.get('/user/:id', function (req, res,...
Why split the tag when writing it with document.write()?
Why do some sites (or advertisers that give clients javascript code) employ a technique of splitting the <script> and/or </script> tags up within document.write() calls?
...
Keeping ASP.NET Session Open / Alive
...
, write a piece of JavaScript code like this one (I have put it in one of site’s JavaScript file):
var keepSessionAlive = false;
var keepSessionAliveUrl = null;
function SetupSessionUpdater(actionUrl) {
keepSessionAliveUrl = actionUrl;
var container = $("#body");
container.mousemove...
Do I really need to encode '&' as '&'?
I'm using an ' & ' symbol with HTML5 and UTF-8 in my site's <title> . Google shows the ampersand fine on its SERPs, as do all the browsers in their titles.
...
Is there a way to make mv create the directory to be moved to if it doesn't exist?
... @Leffler, Not true -- I know bash supports more than 9 arguments (using ${123} is one method). I don't know Perl, so feel free to make an answer yourself. =]
– strager
Feb 13 '09 at 22:06
...
Singleton with Arguments in Java
...(x);
return singleton;
}
}
Then you can call Singleton.init(123) once to configure it, for example in your app startup.
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Is it possible to install another version of Python to Virtualenv?
... Clear out the non-root install and start from scratch
--no-site-packages Don't give access to the global site-packages dir to
the virtual environment
--unzip-setuptools Unzip Setuptools or Distribute when installing it
--relocatable Make an E...
Does Java have something like C#'s ref and out keywords?
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Giving a detailed answer a negative vote is funny. I've checked out SO and couldn't find a fine exact answer with demo code, that's why I've written this answer as far as I can remember. If you wait for a single answer and down vote every other answer, then SO should b...
How do I enter RGB values into Interface Builder?
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I used a Wacom Bamboo Fun writing tablet to write on the screenshot in Photoshop (Gimp works just as well for this). Took the screenshot with command-shift-4, then space and clicked on the window.
– Tyler
Ap...