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What are the use cases for selecting CHAR over VARCHAR in SQL?
I realize that CHAR is recommended if all my values are fixed-width. But, so what? Why not just pick VARCHAR for all text fields just to be safe.
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What is the difference between sigaction and signal?
I was about to add an extra signal handler to an app we have here and I noticed that the author had used sigaction() to set up the other signal handlers. I was going to use signal() . To follow convention I should use sigaction() but if I was writing from scratch, which should I choose?
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What are the differences between a multidimensional array and an array of arrays in C#?
... and can be used more effectively. Multidimensional arrays have nicer syntax.
If you write some simple code using jagged and multidimensional arrays and then inspect the compiled assembly with an IL disassembler you will see that the storage and retrieval from jagged (or single dimensional) arrays ...
Why em instead of px?
...ould define sizes and distances in your stylesheet with em instead of in pixels. So the question is why should I use em instead of px when defining styles in css? Is there a good example that illustrates this?
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What is the meaning of the term arena in relation to memory?
...word and how it relates to memory, and found nothing. Here are a few contexts in which the author uses the term:
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How to use git bisect?
...e our history is so small. If the search range is of N commits, we should expect to test 1 + log2 N commits with git bisect instead of roughly N / 2 commits with a linear search.
Once you've found the commit that introduced the regression, you can study it to find the issue. Once this is done, you ...
Local Storage vs Cookies
... performance-wise) in using local storage to replace cookie functionality except for the obvious compatibility issues?
7 An...
What is the difference between JSON and Object Literal Notation?
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Lets clarify first what JSON actually is. JSON is a textual, language-independent data-exchange format, much like XML, CSV or YAML.
Data can be stored in many ways, but if it should be stored in a text file and be readable by a computer, it needs to follow some structure. JSON ...
What is the effect of extern “C” in C++?
What exactly does putting extern "C" into C++ code do?
15 Answers
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How do I daemonize an arbitrary script in unix?
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You can daemonize any executable in Unix by using nohup and the & operator:
nohup yourScript.sh script args&
The nohup command allows you to shut down your shell session without it killing your script, while the & places your script ...