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How to gracefully handle the SIGKILL signal in Java
...acefully (SIGTERM from the manager process) or a shutdown has occurred (in order to relaunch automatically the job on startup).
As a basis, I always make my long-running threads periodically aware of interrupted status and throw an InterruptedException if they interrupted. This enables execution fi...
How to implement the activity stream in a social network
...be "comment" and "created" respectively), data contains additional data in order to avoid joins (for example, it can contain the subject name and surname, the article title and url, the comment body etc.).
Each Activity belongs to one or more ActivityFeeds, and they are related by a table that look...
403 Forbidden vs 401 Unauthorized HTTP responses
... (or 3xx: redirection)
Checks are usually done in this order:
404 if resource is public and does not exist or 3xx redirection
OTHERWISE:
401 if not logged-in or session expired
403 if user does not have permission to access resource (file, json, ...)
404 if resource does not ex...
Setting variable to NULL after free
...roblem in such cases is to review and rethink the structure of the code in order to avoid the situation when the same pointer is passed to free more than once. In such cases setting the pointer to NULL and considering the problem "fixed" is nothing more than an attempt to sweep the problem under the...
CSS Child vs Descendant selectors
...e green, but ghi will have red background color.
IMPORTANT: If you change order of the rules to:
div>span{background:green}
div span{background:red}
All letters will have red background, because descendant selector selects child's too.
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A fast method to round a double to a 32-bit int explained
...o bad, but on later processors that started to get super-scalar and out-of-order execution, altering the fp rounding mode generally seriales the CPU core and is quite expensive. So on a CPU like a Pentium-III or Pentium-IV, this overall cost is quite high -- a normal fp->int conversion is 10x or...
How to flip windows in vim? [duplicate]
... languages always on a specific side and I do not always open them in that order :)
– Jonathan Komar
Sep 5 '16 at 14:06
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Chrome Extension - Get DOM content
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Erasing elements from a vector
...terested in how many times an element has been added to your vector or the order the elements were added.
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What is the current directory in a batch file?
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