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Scala: What is the difference between Traversable and Iterable traits in Scala collections?

...on. With the Iterator returned by an Iterable though, you suck the values out of it, controlling when to move to the next one yourself. share | improve this answer | follow ...
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Cleaner way to do a null check in C#? [duplicate]

...e changes are rather likely to happen. If code like this is written throughout the codebase, making these changes could become very expensive. Besides that, it means that your BusinessController is coupled to both the BusinessCalculator and the BusinessData types. One way to avoid this situation is...
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What is the canonical way to determine commandline vs. http execution of a PHP script?

...mine if it's been executed via the command-line or via HTTP, primarily for output-formatting purposes. What's the canonical way of doing this? I had thought it was to inspect SERVER['argc'] , but it turns out this is populated, even when using the 'Apache 2.0 Handler' server API. ...
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What is the best algorithm for overriding GetHashCode?

In .NET, the GetHashCode method is used in a lot of places throughout the .NET base class libraries. Implementing it properly is especially important to find items quickly in a collection or when determining equality. ...
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Naming convention for utility classes in Java

... a lecture on consistency once where the speaker put up a slide showing an outline of his speech with three main points, labeled "1", "2nd", and "C".) Never ever ever make two names that differ only in some subtlety of spelling, like having a CustomerUtil and a CustomerUtility. If there was a good ...
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PHP DateTime::modify adding and subtracting months

...th' ); echo $d->format( 'F' ), "\n"; ?> This script will correctly output February. The following things happen when PHP processes this first day of next month stanza: next month increases the month number (originally 1) by one. This makes the date 2010-02-31. first day of sets the day num...
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How to get ELMAH to work with ASP.NET MVC [HandleError] attribute?

...by Atif and also a controller that handles the elmah interface within MVC routing (no need to use that axd anymore) The problem with that solution (and with all the ones here) is that one way or another the elmah error handler is actually handling the error, ignoring what you might want to set up as...
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What is the theoretical maximum number of open TCP connections that a modern Linux box can have

...but is configurable e.g. with sysctl. The realistic limits being boasted about for normal boxes are around 80K for example single threaded Jabber messaging servers. share | improve this answer ...
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Automatically add newline at end of curl response body

...From the man file: To better allow script programmers to get to know about the progress of curl, the -w/--write-out option was introduced. Using this, you can specify what information from the previous transfer you want to extract. To display the amount of bytes downloaded together with...
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When to use AtomicReference in Java?

...s, you can do this even if the cache object is shared amongst threads, without using synchronized. In general, you're better off using synchronizers or the java.util.concurrent framework rather than bare Atomic* unless you know what you're doing. Two excellent dead-tree references which will intro...