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Covariance and contravariance real world example
... you have a method that returns an IEnumerable<Teacher>. Covariance allows you to directly use that result for the methods that take an IEnumerable<Person>, substituting a more derived type for a less derived (more generic) type. Contravariance, counter-intuitively, allows you to use a...
:after vs. ::after
...or ::first-letter, things that aren't elements in their own right.
Actually, better description here: http://bricss.net/post/10768584657/know-your-lingo-pseudo-class-vs-pseudo-element
Also here: http://www.evotech.net/blog/2007/05/after-v-after-what-is-double-colon-notation/
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How do I loop through a list by twos? [duplicate]
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@RoelVandePaar, No that is still an integer. Actually I found the answer. import numpy as np for i in np.arange(-3.14, 3.14, 0.1): print (i)
– Kevin Patel
May 20 at 17:40
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vs
...urns the character encoding you specified, not the encoding that IE is actually using."
– hotshot309
Jun 5 '12 at 13:51
7
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CSS attribute selector does not work a href
...a query string or hash fragment. If we combine the 3 cases we should match all pdf links.
a[href$='.pdf'], a[href*='.pdf?'], a[href*='.pdf#'] {
background: red;
}
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How to add border radius on table row
...d td:last-child { border-bottom-right-radius: 10px; }
Be sure to provide all the vendor prefixes. Here's an example of it in action.
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Default html form focus without JavaScript
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You can do it in HTML5, but otherwise, you must use JavaScript.
HTML5 allows you to add autofocus to your form element, eg:
<input type="text" name="myInput" autofocus />
This does work in browsers which support HTML5 (Or rather, browsers which support this particular part of HTML5) bu...
Git Gui: Perpetually getting “This repository currently has approximately 320 loose objects.”
...od disk space utilization and good operating performance.
--aggressive
Usually git gc runs very quickly while providing good disk space utilization and performance. This option will cause git gc to more aggressively optimize the repository at the expense of taking much more time. The effects of thi...
Make install, but not to default directories?
I want to run 'make install' so I have everything I need, but I'd like it to install the things in their own folder as opposed to the system's /usr/bin etc. is that possible? even if it references tools in the /usr/bin etc.?
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Difference between getAttribute() and getParameter()
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Generally, a parameter is a string value that is most commonly known for being sent from the client to the server (e.g. a form post) and retrieved from the servlet request. The frustrating exception to this is ServletContext init...