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Deleting all files from a folder using PHP?

For example I had a folder called `Temp' and I wanted to delete or flush all files from this folder using PHP. Could I do this? ...
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Why does Double.NaN==Double.NaN return false?

...enormalized value or a signed zero, and an operation that has no mathematically definite result produces NaN. All numeric operations with NaN as an operand produce NaN as a result. As has already been described, NaN is unordered, so a numeric comparison operation involving one or two NaNs returns fa...
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javac option to compile all java files under a given directory recursively

...oject and don't have any proper build tools nearby, you can always use a small trick that javac offers: the classnames to compile can be specified in a file. You simply have to pass the name of the file to javac with the @ prefix. If you can create a list of all the *.java files in your project, it'...
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How do you remove all the options of a select box and then add one option and select it with jQuery?

Using core jQuery, how do you remove all the options of a select box, then add one option and select it? 24 Answers ...
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Installing R on Mac - Warning messages: Setting LC_CTYPE failed, using “C”

I would like install R on my laptop Mac OS X version 10.7.3 6 Answers 6 ...
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XSD - how to allow elements in any order any number of times?

... basically yes, i am looking for elements child1, child2 to appear in any order, any number of times.. the answer you provided here only works for single element, right? or does this solve my requirement also? ...
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Applying a git post-commit hook to all current and future repos

...hook and it works correctly. However, I want to add this hook to apply to all current (and future) git repositories I am working on. I tried adding the hook to my ~/.git/hooks/ instead of in the hooks directory in the project directory, however, this did not seem to work. ...
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Lock-free multi-threading is for real threading experts

... the time is that you do not have dedicated locks - instead you treat e.g. all elements in an array or all nodes in a linked list as a "spin-lock". You read, modify and try to update if there was no update since your last read. If there was, you retry. This makes your "locking" (oh, sorry, non-locki...
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How to set warning level in CMake?

...CMake user should refrain from fiddling with CMAKE_CXX_FLAGS directly and call the target_compile_options command instead. Check the mrts' answer which presents the recommended best practice. You can do something similar to this: if(MSVC) # Force to always compile with W4 if(CMAKE_CXX_FLAGS MA...
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Decimal precision and scale in EF Code First

...number of digits the db will store, regardless of where the decimal point falls and scale is the number of decimal places it will store. Therefore there is no need to iterate through properties as shown but the can just be called from public class EFDbContext : DbContext { protected override v...