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What's the difference between an exclusive lock and a shared lock?

... I wrote this answer down because I thought this would be a fun (and fitting) analogy: Think of a lockable object as a blackboard (lockable) in a class room containing a teacher (writer) and many students (readers). While a teacher is writing something (exclusive lock) on the board: No...
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PowerShell and the -contains operator

... The -Contains operator doesn't do substring comparisons and the match must be on a complete string and is used to search collections. From the documentation you linked to: -Contains Description: Containment operator. Tells whether a collection of reference values includes a...
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Double vs single quotes

I'm really new to Ruby and I'm trying to understand if there's a specific time when I should use "" vs '' . 8 Answers ...
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What is the difference between syntax and semantics in programming languages?

What is the difference between syntax and semantics in programming languages (like C, C++)? 10 Answers ...
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How do you post to an iframe?

...ut if you're using ordinary HTML markup, you're fine. The target attribute and frame names isn't some clever ninja hack; although it was deprecated (and therefore won't validate) in HTML 4 Strict or XHTML 1 Strict, it's been part of HTML since 3.2, it's formally part of HTML5, and it works in just a...
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What is the best way to tell if a character is a letter or number in Java without using regexes?

What is the best and/or easiest way to recognize if a string.charAt(index) is an A-z letter or a number in Java without using regular expressions? Thanks. ...
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sql query to return differences between two tables

...ies. I need to check three pieces of data in doing so, FirstName, LastName and Product. 12 Answers ...
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How to define custom exception class in Java, the easiest way?

I'm trying to define my own exception class the easiest way, and this is what I'm getting: 8 Answers ...
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What is the list of supported languages/locales on Android?

...r different languages. Where can I find the supported list of languages on Android? 14 Answers ...
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Best approach for GPGPU/CUDA/OpenCL in Java?

...luding MacOS X, FreeBSD, Linux, Windows, Solaris, all in Intel 32, 64 bits and ppc variants, thanks to its use of JNA). It has demos that actually run fine from Java Web Start at least on Mac and Windows (to avoid random crashes on Linux, please see this wiki page, such as this Particles Demo. It ...