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Case objects vs Enumerations in Scala
...g difference is that Enumerations come with support for instantiating them from some name String. For example:
object Currency extends Enumeration {
val GBP = Value("GBP")
val EUR = Value("EUR") //etc.
}
Then you can do:
val ccy = Currency.withName("EUR")
This is useful when wishing to pers...
How should I unit test threaded code?
...I'm working on a project that is inherently multithreaded. Events come in from the operating system and I have to process them concurrently.
The simplest way to deal with testing complex, multithreaded application code is this: If its too complex to test, you're doing it wrong. If you have a s...
Why do people put code like “throw 1; ” and “for(;;);” in front of json responses? [du
...;/script>
What will happen now is that the Javascript code that comes from Google -- which the asker thought would be benign and immediately fall out of scope -- will actually be posted to my evil site. Suppose that the URL requested in the script tag sends (because your browser will present th...
Remove underline from links in TextView - Android
I am using two textview to display links from database, I managed to change link colors but I want to remove the underline
...
Java Garbage Collection Log messages
...e collection to be printed at each collection. For example, here is output from a large server application:
[GC 325407K->83000K(776768K), 0.2300771 secs]
[GC 325816K->83372K(776768K), 0.2454258 secs]
[Full GC 267628K->83769K(776768K), 1.8479984 secs]
Here we see two minor collection...
Why would a JavaScript variable start with a dollar sign? [duplicate]
... common use in jQuery is to distinguish jQuery objects stored in variables from other variables.
For example, I would define:
var $email = $("#email"); // refers to the jQuery object representation of the dom object
var email_field = $("#email").get(0); // refers to the dom object itself
I fin...
Anything wrong with NOT signing a .NET assembly?
...semblies. He literally tries to sign anything. Even when we use assemblies from Microsoft that are not signed, he will take the source code, sign it and then ask other developers to use his copy instead.
...
Sort array of objects by object fields
...
Use usort, here's an example adapted from the manual:
function cmp($a, $b) {
return strcmp($a->name, $b->name);
}
usort($your_data, "cmp");
You can also use any callable as the second argument. Here are some examples:
Using anonymous functions (from...
Do AJAX requests retain PHP Session info?
...I had a user logged onto my site, having his id stored in $_SESSION , and from his browser he clicked a 'Save' button which would make an AJAX request to the server. Will his $_SESSION and cookies be retained in this request, and can I safely rely on the id being present in the $_SESSION ?
...
apache redirect from non www to www
I have a website that doesn't seem to redirect from non-www to www.
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