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Detect when an image fails to load in Javascript
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You could try the following code. I can't vouch for browser compatibility though, so you'll have to test that.
function testImage(URL) {
var tester=new Image();
tester.onload=imageFound;
tester.onerror=imageNotFound;
tester.src=URL;
}
function imageFound() {
alert('That im...
How to create SBT project with IntelliJ Idea?
I just got started with Scala/LiftWeb/Sbt developing, and I'd like to import a Sbt project in IntelliJ Idea.
Actually, I managed to import my project in two different ways:
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What does “var FOO = FOO || {}” (assign a variable or an empty object to that variable) mean in Java
...e, i.e. a named object under which functions and variables can be created without unduly polluting the global object.
The reason why it's used is so that if you have two (or more) files:
var MY_NAMESPACE = MY_NAMESPACE || {};
MY_NAMESPACE.func1 = {
}
and
var MY_NAMESPACE = MY_NAMESPACE || {};
M...
How does __proto__ differ from constructor.prototype?
It always returns the object with rating = 3.
8 Answers
8
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Which is preferred: Nullable.HasValue or Nullable != null?
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The compiler replaces null comparisons with a call to HasValue, so there is no real difference. Just do whichever is more readable/makes more sense to you and your colleagues.
share
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Moving from CVS to Git: $Id$ equivalent?
...gh a bunch of questions asking about simple source code control tools and Git seemed like a reasonable choice. I have it up and running, and it works well so far. One aspect that I like about CVS is the automatic incrementation of a version number.
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How do I use the nohup command without getting nohup.out?
I have a problem with the nohup command.
8 Answers
8
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Prevent HTML5 video from being downloaded (right-click saved)?
... that's what browsers were designed to do: Serve content. But you can make it harder to download.
First thing's first, you could disable the contextmenu event, aka "the right click". That would prevent your regular skiddie from blatantly ripping your video by right clicking and Save As. But then th...
Initialize class fields in constructor or at declaration?
...ming in C# and Java recently and I am curious where the best place is to initialize my class fields.
15 Answers
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Should CSS always preceed Javascript?
...>s before my JS <script src="...">s because "I read one time that it's better." So, you're right; it's high time we do some actual research!
I set up my own test harness in Node (code below). Basically, I:
Made sure there was no HTTP caching so the browser would have to do a full downl...