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What's the best way to send a signal to all members of a process group?
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As usual with almost any command, if you want a normal argument that starts with a - to not be interpreted as a switch, precede it with --: kill -- -GPID
– ysth
Dec 24 '08 at 21:47
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Error: could not find function … in R
...nctions.
If you have no clue about the package, you can use findFn in the sos package as explained in this answer.
RSiteSearch("some.function") or searching with rdocumentation or rseek are alternative ways to find the function.
Sometimes you need to use an older version of R, but run code created...
Securely storing environment variables in GAE with app.yaml
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Of all the provided answers, this seems closest to how Heroku handles things. Being rather new to GAE, I don't quite understand where in the Developers Console to find the placeholder record. Can you explain, or for bonus points, post screenshots?
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List files by last edited date
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If you're doing this at the prompt and want to see the most recently modified files, consider ls -lrt[RhA]. the -r reverses the sort order, leaving recently edited stuff at the bottom of the list...
– dmckee --- ex-moderator kitten
Sep 10 '09...
How can I obtain the element-wise logical NOT of a pandas Series?
...t results may vary depending on many factors including hardware, compiler, OS, Python, NumPy and Pandas versions.
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TCP vs UDP on video stream
...pliances are not designed with TCP streaming in mind. If you use TCP, the OS must buffer the unacknowledged segments for every client. This is undesirable, particularly in the case of live events; presumably your list of simultaneous clients is long due to the singularity of the event. Pre-record...
Why malloc+memset is slower than calloc?
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The short version: Always use calloc() instead of malloc()+memset(). In most cases, they will be the same. In some cases, calloc() will do less work because it can skip memset() entirely. In other cases, calloc() can even cheat and not allocate any memory! However, malloc()+memset() will always...
Can local storage ever be considered secure? [closed]
...ion, local script injection, browser cache poisoning, and DNS redirects. Those attacks only work if the user uses the machine after it has been compromised. Nevertheless, physical access in such a scenario means you have bigger problems.
So keep in mind that the limited scenario where local crypto ...
AES Encryption for an NSString on the iPhone
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Since you haven't posted any code, it's difficult to know exactly which problems you're encountering. However, the blog post you link to does seem to work pretty decently... aside from the extra comma in each call to CCCrypt() which caused comp...
Will HTML5 allow web apps to make peer-to-peer HTTP connections?
Is it possible to create a web app that, with the help of a central server, could create direct connections with other users of the same web app? I'm imagining a process similar to UDP hole punching.
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