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What is an optional value in Swift?

...long with Generics) are one of the most difficult Swift concepts to understand. Because of how they are written and used, it's easy to get a wrong idea of what they are. Compare the optional above to creating a normal String: var name: String = "Bertie" // No "?" after String From the syntax it loo...
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How to list all installed packages and their versions in Python?

Is there a way in Python to list all installed packages and their versions? 11 Answers ...
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How to grant permission to users for a directory using command line in Windows?

...sions to a user on a directory (Read, Write, Modify) using the Windows command line? 17 Answers ...
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Any way to modify Jasmine spies based on arguments?

...ent parameters. I'd like to mock this external API out with a Jasmine spy, and return different things based on the parameters. Is there any way to do this in Jasmine? The best I can come up with is a hack using andCallFake: ...
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What is console.log?

...vailable. You should use window.console (as window is guaranteed to exist) and only check one depth level at one time. – Tgr Jan 11 '11 at 18:10  |  ...
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Why is exception.printStackTrace() considered bad practice?

...() writes the stack trace to System.err PrintStream. The System.err stream and the underlying standard "error" output stream of the JVM process can be redirected by invoking System.setErr() which changes the destination pointed to by System.err. or by redirecting the process' error output stream. ...
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Choose between ExecutorService's submit and ExecutorService's execute

... There is a difference concerning exception/error handling. A task queued with execute() that generates some Throwable will cause the UncaughtExceptionHandler for the Thread running the task to be invoked. The default UncaughtExceptionHandler, which typically prints the Thro...
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Are HTTP cookies port specific?

... The current cookie specification is RFC 6265, which replaces RFC 2109 and RFC 2965 (both RFCs are now marked as "Historic") and formalizes the syntax for real-world usages of cookies. It clearly states: Introduction ... For historical reasons, cookies contain a number of se...
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log4j vs logback [closed]

...tly for logging, but that is highly discouraged. All logback documentation and examples on loggers are written in terms of the SLF4J API. So by using logback, you'd be actually using SLF4J and if for any reason you wanted to switch back to log4j, you could do so within minutes by simply dropping s...
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Can I automatically increment the file build version when using Visual Studio?

I was just wondering how I could automatically increment the build (and version?) of my files using Visual Studio (2005). ...