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How to check null objects in jQuery
I'm using jQuery and I want to check the existence of an element in my page. I have written following code, but it's not working:
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'this' vs $scope in AngularJS controllers
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"How does this and $scope work in AngularJS controllers?"
Short answer:
this
When the controller constructor function is called, this is the controller.
When a function defined on a $scope object is called, this is the "scope in effec...
Maven error: Could not find or load main class org.codehaus.plexus.classworlds.launcher.Launcher
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I hit this problem too, and found this article. For Maven3, changing my environment variable name from M2_HOME to M3_HOME did the trick. I am on a Mac running OSX 10.9 with JDK 1.7. Hope this helps.
Note: Please delete M2_HOME, if already set. E...
Best way to load module/class from lib folder in Rails 3?
Since the latest Rails 3 release is not auto-loading modules and classes from lib anymore,
what would be the best way to load them?
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Mercurial (hg) commit only certain files
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You can specify the files on the command line, as tonfa writes:
$ hg commit foo.c foo.h dir/
That just works and that's what I do all the time. You can also use the --include flag that you've found, and you can use it several times like this:
$ hg commit -I ...
How to convert linq results to HashSet or HashedSet
...or generic methods to do it for us.
Now you could choose to name it ToSet and return ISet<T> - but I'd stick with ToHashSet and the concrete type. This is consistent with the standard LINQ operators (ToDictionary, ToList) and allows for future expansion (e.g. ToSortedSet). You may also want t...
Realistic usage of the C99 'restrict' keyword?
I was browsing through some documentation and questions/answers and saw it mentioned. I read a brief description, stating that it would be basically a promise from the programmer that the pointer won't be used to point somewhere else.
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AttributeError(“'str' object has no attribute 'read'”)
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I don't understand this...how does doing read() solve the problem? The response still doesn't have a read function. Are we supposed to put the string in some object with a read function?
– zakdances
Au...
How to print from GitHub
...ne of code in the URL field.
If you now go to a Markdown page on Github and click the bookmark it will reformat the page and change the CSS so that it looks the same as on screen when you print. Now just print the page.
Bookmarklet contents:
javascript:(function(e,a,g,h,f,c,b,d)%7Bif(!(f=e.jQue...
Convert JSON string to dict using Python
...ittle bit confused with JSON in Python.
To me, it seems like a dictionary, and for that reason
I'm trying to do that:
4 Ans...