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Test if a vector contains a given element
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Both the match() (returns the first appearance) and %in% (returns a Boolean) functions are designed for this.
v <- c('a','b','c','e')
'b' %in% v
## returns TRUE
match('b',v)
## returns the first location of 'b', in this case: 2
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Get the last item in an array
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}
In the event that your server serves the same file for "index.html" and "inDEX.htML" you can also use: .toLowerCase().
Though, you might want to consider doing this server-side if possible: it will be cleaner and work for people without JS.
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Check if list is empty in C# [closed]
...d from a database. I need to display an error message if the list is empty and display a grid view otherwise.
8 Answers
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git produces Gtk-WARNING: cannot open display
I've been working on my project remotely through the command line on a machine to which I don't have admin rights and after running git push origin master I get the following error message:
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How to retrieve all keys (or values) from a std::map and put them into a vector?
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Personally, I like the BOOST_FOREACH version because there is less typing and it is very explicit about what it is doing.
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Java Synchronized Block for .class
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So, if you have a static method and we don't want to synchronize all of its body, then we synchronized(this) is not good, instead synchronized(Foo.class) is appropriate. Is that right?
– krupal.agile
May 15 '19 at 13:3...
How to have multiple CSS transitions on an element?
...is starts to get repetitive, so if you're going to be using the same times and timing functions across multiple properties it's best to go ahead and use the various transition-* properties instead of the shorthand:
transition-property: color, text-shadow;
transition-duration: .2s;
transition-timing...
Do I need a content-type header for HTTP GET requests?
...e.
It means that the Content-Type HTTP header should be set only for PUT and POST requests.
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Get JSF managed bean by name in any Servlet related class
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In a servlet based artifact, such as @WebServlet, @WebFilter and @WebListener, you can grab a "plain vanilla" JSF @ManagedBean @RequestScoped by:
Bean bean = (Bean) request.getAttribute("beanName");
and @ManagedBean @SessionScoped by:
Bean bean = (Bean) request.getSession().getAttribu...
Two color borders
...r. Beware, tho', it can interact in a wonky fashion with margins, paddings and drop-shadows. In some browsers you might have to use a browser-specific prefix as well; in order to make sure it picks up on it: -webkit-outline and the like (although WebKit in particular doesn't require this).
This can...