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Check if null Boolean is true results in exception
...answered Jun 12 '12 at 21:42
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Threads vs Processes in Linux
... threads -- everything is simply a runnable task. *
On Linux, the system call clone clones a task, with a configurable level of sharing, among which are:
CLONE_FILES: share the same file descriptor table (instead of creating a copy)
CLONE_PARENT: don't set up a parent-child relationship between t...
How to execute shell command in Javascript
...Except for one thing. You'll get the error "child is not a function". The call to exec() executes the command - no need to call child(). Unfortunately, the callback isn't called whenever the child process has something to output - it is called only when the child process exits. Sometimes that's OK a...
vim deleting backward tricks
...pace)
db deletes current to beginning of current word
Read this to learn all the things you can combine with the 'd' command.
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What is a domain specific language? Anybody using it? And in what way?
... Groovy is a scripting language that runs in a JVM. It's basically intended to be a Java answer to Ruby. It's a general purpose language but it can be used to write DSLs. docs.groovy-lang.org/docs/latest/html/documentation/…
– Charlie Martin
Jul ...
Why do I have to access template base class members through the this pointer?
...emplate parameter. Others are deferred until the parameter is known. It's called two-phase compilation, and MSVC doesn't do it but it's required by the standard and implemented by the other major compilers. If you like, the compiler must compile the template as soon as it sees it (to some kind of in...
Changing CSS Values with Javascript
...ds like you want to change the global CSS so which will effictively change all elements of a peticular style at once. I've recently learned how to do this myself from a Shawn Olson tutorial. You can directly reference his code here.
Here is the summary:
You can retrieve the stylesheets via docum...
CommandError: You must set settings.ALLOWED_HOSTS if DEBUG is False
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Try
ALLOWED_HOSTS = ['*']
Less secure if you're not firewalled off or on a public LAN, but it's what I use and it works.
EDIT: Interestingly enough I've been needing to add this to a few of my 1.8 projects even when DEBUG = Tr...
How to make CSS3 rounded corners hide overflow in Chrome/Opera
... This looks like another bug in WebKit (or probably Chrome), but it works. All you need to do - is to add a WebKit CSS Mask to the #wrapper element. You can use a single pixel png image and even include it to the CSS to save a HTTP request.
#wrapper {
width: 300px; height: 300px;
border-radius: 10...
When to use actors instead of messaging solutions such as WebSphere MQ or Tibco Rendezvous?
...quire casting due to Scala's type system.
Also in Java people don't typically make immutable objects which I recommend you do for messaging. Consequently its very easy in Java to accidentally do something using Akka that will not scale (using mutable objects for messages, relying on weird closure ...