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How to search DOM elements using XPath or CSS selectors in Chrome Developer Tools?
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You can use $x in the Chrome javascript console. No extensions needed.
ex: $x("//img")
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Calculate difference between two datetimes in MySQL
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USE TIMESTAMPDIFF MySQL function. For example, you can use:
SELECT TIMESTAMPDIFF(SECOND, '2012-...
JavaScript: empty array, [ ] evaluates to true in conditional structures. Why is this?
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convert streamed buffers to utf8-string
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Paperclip::Errors::MissingRequiredValidatorError with Rails 4
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Responsive iframe using Bootstrap
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Option 1
With Bootstrap 3.2 you can wrap each iframe in the responsive-embed wrapper of your ...
Twitter Bootstrap: div in container with 100% height
Using twitter bootstrap (2), I have a simple page with a nav bar, and inside the container I want to add a div with 100% height (to the bottom of the screen). My css-fu is rusty, and I can't work this out.
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Using helpers in model: how do I include helper dependencies?
...rom a text area. Following the advice from http://blog.caboo.se/articles/2008/8/25/sanitize-your-users-html-input , I'm cleaning up the input in the model before saving to database, using the before_validate callback.
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How can I make setuptools install a package that's not on PyPI?
...ing it to http://github.com/mtai/python-gearman/tarball/master#egg=gearman-2.0.0beta instead, easy_install will be able to identify the package name and its version.
The final step is to add the URL to your package's dependency_links, e.g.:
setup(
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dependency_links = ['http://github.com/m...
str.startswith with a list of strings to test for
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