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What is a semaphore?

...s bouncers at a nightclub. There are a dedicated number of people that are allowed in the club at once. If the club is full no one is allowed to enter, but as soon as one person leaves another person might enter. It's simply a way to limit the number of consumers for a specific resource. For exampl...
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File uploading with Express 4.0: req.files undefined

... this: { file: { fieldName: 'file', originalFilename: '360px-Cute_Monkey_cropped.jpg', name: '360px-Cute_Monkey_cropped.jpg' path: 'uploads/6323-16v7rc.jpg', type: 'image/jpeg', headers: { 'content-disposition': 'form-data; name="file"; filename="360px-Cute_Monke...
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What actually causes a Stack Overflow error? [duplicate]

...ve programs, when there is a risk of writing into memory that had not been allocated for the buffer, and thus to corrupt some other memory locations. It's not the case at all. JVM has a given memory allocated for each stack of each thread, and if an attempt to call a method happens to fill this mem...
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Are memory leaks ever ok? [closed]

...forced this situation on me, it would lead me to seriously suspect the overall quality of the library in question. It would be as if I test drove a car and found a couple loose washers and nuts in one of the cupholders – it may not be a big deal in itself, but it portrays a lack of commitment to ...
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How to exit pdb and allow program to continue?

...b module to debug a program. I'd like to understand how I can exit pdb and allow the program to continue onward to completion. The program is computationally expensive to run, so I don't want to exit without the script attempting to complete. continue doesn't seems to work. How can I exit pdb and ...
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'git' is not recognized as an internal or external command

... Which path should I add on PATH; <git_installation>\bin , <git_installation>\libexec\git-core or <git_installation>\cmd? Each of them contains git.exe. – IronBlossom May 29 '14 at 11:38 ...
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What's the state of the art in email validation for Rails?

... answered Aug 24 '10 at 9:56 HallelujahHallelujah 77466 silver badges44 bronze badges ...
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Remove specific commit

...hanged line 2" 1 files changed, 1 insertions(+), 1 deletions(-) Then it all works as expected. The second answer was very interesting. There is a feature which has not yet been officially released (though it is available in Git v1.7.2-rc2) called Revert Strategy. You can invoke git like this: ...
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How do you create an asynchronous method in C#?

...what if that is not the case. What if were trying to wrap some code that calls BeginInvoke with some callback code? – Ricibob Aug 27 '13 at 10:46 2 ...
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Is there a way to make R beep/play a sound at the end of a script?

...ion sounds in R which should work cross-platform. Run the following to install beepr and make a sound: install.packages("beepr") library(beepr) beep() More info at github: https://github.com/rasmusab/beepr share ...