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How to make zsh run as a login shell on Mac OS X (in iTerm)?
...zsh’ (‘-’ is put as the first character of arg[0]) which is supposed to mean that it should start as a login shell.
6...
How efficient is locking an unlocked mutex? What is the cost of a mutex?
...s or a single one for an object.
If you have many threads and the access to the object happens often, then multiple locks would increase parallelism. At the cost of maintainability, since more locking means more debugging of the locking.
How efficient is it to lock a mutex? I.e. how much assem...
Changing .gitconfig location on Windows
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If you set HOME to c:\my_configuration_files\, then git will locate .gitconfig there. Editing environment variables is described here. You need to set the HOME variable, then re-open any cmd.exe window. Use the "set" command to verify that H...
How to find the 'sizeof' (a pointer pointing to an array)?
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No, you can't. The compiler doesn't know what the pointer is pointing to. There are tricks, like ending the array with a known out-of-band value and then counting the size up until that value, but that's not using sizeof().
Another trick is the one mentioned by Zan, which is to stash the si...
Do zombies exist … in .NET?
...He argued that .NET locking should be avoided on critical systems expected to be under heavy-load if at all possible in order to avoid the admittedly small possibility of a "zombie thread" crashing a system. I routinely use locking and I didn't know what a "zombie thread" was, so I asked. The impr...
Simplest way to serve static data from outside the application server in a Java web application
I have a Java web application running on Tomcat. I want to load static images that will be shown both on the Web UI and in PDF files generated by the application. Also new images will be added and saved by uploading via the Web UI.
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How to use redis PUBLISH/SUBSCRIBE with nodejs to notify clients when data values change?
...lish/subscribe application with NodeJS and Redis. I need an example of how to notify web clients when the data values in Redis change.
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The entity cannot be constructed in a LINQ to Entities query
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You cannot (and should not be able to) project onto a mapped entity. You can, however, project onto an anonymous type or onto a DTO:
public class ProductDTO
{
public string Name { get; set; }
// Other field you may need from the Product entity
}
And...
Calling clojure from java
Most of the top google hits for "calling clojure from java" are outdated and recommend using clojure.lang.RT to compile the source code. Could you help with a clear explanation of how to call Clojure from Java assuming you have already built a jar from the Clojure project and included it in the cl...
How to redirect output to a file and stdout
...ple, if you only care about stdout:
ls -a | tee output.file
If you want to include stderr, do:
program [arguments...] 2>&1 | tee outfile
2>&1 redirects channel 2 (stderr/standard error) into channel 1 (stdout/standard output), such that both is written as stdout. It is also direc...