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how to reference a YAML “setting” from elsewhere in the same YAML file?
...on't think it is possible. You can reuse "node" but not part of it.
bill-to: &id001
given : Chris
family : Dumars
ship-to: *id001
This is perfectly valid YAML and fields given and family are reused in ship-to block. You can reuse a scalar node the same way but there's no way you can...
Spinlock versus Semaphore
...spinlocks are only valid within one process whereas semaphores can be used to synchronize between different processes, too.
A lock works for mutual exclusion, that is one thread at a time can acquire the lock and proceed with a "critical section" of code. Usually, this means code that modifies some...
Get the value in an input text box
What are the ways to get and render an input value using jQuery?
12 Answers
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How to check if there exists a process with a given pid in Python?
Is there a way to check to see if a pid corresponds to a valid process? I'm getting a pid from a different source other than from os.getpid() and I need to check to see if a process with that pid doesn't exist on the machine.
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Connect Java to a MySQL database
How do you connect to a MySQL database in Java?
14 Answers
14
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Changing the default folder in Emacs
I am fairly new to Emacs and I have been trying to figure out how to change the default folder for C-x C-f on start-up. For instance when I first load Emacs and hit C-x C-f its default folder is C:\emacs\emacs-21.3\bin , but I would rather it be the desktop. I believe there is some way to custo...
Check if pull needed in Git
How do I check whether the remote repository has changed and I need to pull?
24 Answers
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When to use Common Table Expression (CTE)
...Common Table Expression and cannot think of a use case where I would need to use them. They would seem to be redundant as the same can be done with derived tables. Is there something I am missing or not understanding well? Can someone give me a simple example of limitations with regular select, der...
How do I write a bash script to restart a process if it dies?
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Avoid PID-files, crons, or anything else that tries to evaluate processes that aren't their children.
There is a very good reason why in UNIX, you can ONLY wait on your children. Any method (ps parsing, pgrep, storing a PID, ...) that tries to work around that is flawed and ...
How to parse JSON in Java
I have the following JSON text. How can I parse it to get the values of pageName , pagePic , post_id , etc.?
34 Answers
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