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Rails :include vs. :joins
...oins => users to pull in all the user information for sorting purposes, etc it will work fine and take less time than :include, but say you want to display the comment along with the users name, email, etc. To get the information using :joins, it will have to make separate SQL queries for each u...
Are types like uint32, int32, uint64, int64 defined in any stdlib header?
...
The questioner actually asked about int16 (etc) rather than (ugly) int16_t (etc).
There are no standard headers - nor any in Linux's /usr/include/ folder that define them without the "_t".
sh...
Which is faster : if (bool) or if(int)?
...ngs like sign-extend to bring it to certain widths to put it on the stack, etc. (You can't push a byte.)
When the optimizer views the AST and does its magic, however, it looks at surrounding context and "knows" when it can replace code with something more efficient without changing semantics. So ...
Python - Create a list with initial capacity
...to 300x slower than other languages due to Python features like decorators etc (https://wiki.python.org/moin/PythonSpeed/PerformanceTips#Data_Aggregation#Data_Aggregation).
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How to get current CPU and RAM usage in Python?
...d way of getting current system status (current CPU, RAM, free disk space, etc.) in Python? Bonus points for *nix and Windows platforms.
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Relative imports in Python 2.7
... __name__ is lib.foo. We take the first code path, importing from .fileA, etc.
If run as python lib/foo.py, __package__ will be None and __name__ will be __main__.
We take the second code path. The lib directory will already be in sys.path so there is no need to add it. We import from fileA, etc...
To underscore or to not to underscore, that is the question
...n underscore.
By default, StyleCop disallows the use of underscores, m_, etc., to mark local class fields, in favor of the ‘this.’ prefix. The advantage of using ‘this.’ is that it applies equally to all element types including methods, properties, etc., and not just fields, making all cal...
Injecting content into specific sections from a partial view ASP.NET MVC 3 with Razor View Engine
...nderExtensions {
/// <summary>
/// Delegate script/resource/etc injection until the end of the page
/// <para>@via https://stackoverflow.com/a/14127332/1037948 and http://jadnb.wordpress.com/2011/02/16/rendering-scripts-from-partial-views-at-the-end-in-mvc/ </para>
...
Determine project root from a running node.js application
...y on a global variable, which means that you can't easily reuse components/etc.
process.cwd()
This returns the current working directory. Not reliable at all, as it's entirely dependent on what directory the process was launched from:
$ cd /home/demo/
$ mkdir subdir
$ echo "console.log(process.c...
Design patterns or best practices for shell scripts [closed]
...t talk about best practices or design patterns for shell scripts (sh, bash etc.)?
9 Answers
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