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How to remove non-alphanumeric characters?
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Here's an example if you want to include the hyphen as an allowed character. I needed this because I needed to strip out disallowed characters from a Moodle username, based on email addresses: preg_replace("/[^a-z0-9_.@\-]/", '', $string);
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Capistrano - clean up old releases
Usually when using capistrano, I will go and manually delete old releases from a deployed application. I understand that you can run cap deploy:cleanup but that still leaves 5 releases. Is this it's intended purpose? Is there another way to cleanup old releases to just 1 previous deploy?
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How to get a list of user accounts using the command line in MySQL?
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I find this format the most useful as it includes the host field which is important in MySQL to distinguish between user records.
select User,Host from mysql.user;
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R - Markdown avoiding package loading messages
...a minor issue though. When I source a file in an R-Chunk, the knitr output includes external comments as follows:
4 Answer...
Check if PHP session has already started
... An example for testing if session_id() returns empty string in an include file:
– tgoneil
Oct 5 '12 at 8:05
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How to tell which commit a tag points to in Git?
... @CharlesBailey, fair enough, but the question and answers have morphed to include annotated tags and the fact that git show-ref behaves differently on the two different types of tags is not obvious or common knowledge.
– Old Pro
Sep 15 '13 at 1:19
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Insert text with single quotes in PostgreSQL
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According to PostgreSQL documentation (4.1.2.1. String Constants):
To include a single-quote character within a string constant, write two
adjacent single quotes, e.g. 'Dianne''s horse'.
See also the standard_conforming_strings parameter, which controls whether escaping with backslashes wor...
Do python projects need a MANIFEST.in, and what should be in it?
...as at python-distribute.org, but that registration has lapsed) tells me to include doc/txt files and .py files are excluded in MANIFEST.in file
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Why use non-member begin and end functions in C++11?
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This should not include the template<> lines. You are declaring a new function overload, not specializing a template.
– David Stone
Aug 7 '16 at 17:22
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jQuery or javascript to find memory usage of page
...t be a good estimation, but it could be quite inaccurate since it wouldn't include event binding, data(), plugins, and other in-memory data structures.
If you really want to stick with your idea you should separate fixed and dynamic content.
Fixed content is not dependant on user actions (memory...