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Using @include vs @extend in Sass?

...tainable by using extends and mixins effectively: http://thecodingdesigner.com/posts/balancing Note that SASS unfortunately does not allow using extends inside media queries (and corresponding example from the above link is wrong). In the situation where you need to extend based on media queries, u...
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How to check for a valid Base64 encoded string

... It's pretty easy to recognize a Base64 string, as it will only be composed of characters 'A'..'Z', 'a'..'z', '0'..'9', '+', '/' and it is often padded at the end with up to three '=', to make the length a multiple of 4. But instead of comparing these, you'd be better off ignoring the except...
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DROP IF EXISTS VS DROP?

...lly good idea for one to use CASCADE within a transaction block (BEGIN ... COMMIT). This way it is clear how the database will be affected before potentially clobbering a bunch of data you may not have wanted to. – jbowman Apr 21 '15 at 17:57 ...
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Can I set a breakpoint on 'memory access' in GDB?

...point 2: *0xfeedface but one limitation applies to the rwatch and awatch commands; you can't use gdb variables in expressions: gdb$ rwatch $ebx+0xec1a04f Expression cannot be implemented with read/access watchpoint. So you have to expand them yourself: gdb$ print $ebx $13 = 0x135700 gdb$ rwa...
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Running a specific test case in Django when your app has a tests directory

The Django documentation ( http://docs.djangoproject.com/en/1.3/topics/testing/#running-tests ) says that you can run individual test cases by specifying them: ...
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How do I get the number of days between two dates in JavaScript?

...e documentation for the Date object and its methods, and for anything more complicated, strongly consider using a library that offers more safe and powerful APIs for date manipulation. Numbers and Dates -- MDN JavaScript Guide Date -- MDN JavaScript reference Also, for illustration purposes, the...
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JQuery: detect change in input field [duplicate]

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How can I refresh a page with jQuery?

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MAC addresses in JavaScript

...ozilla in general) gets higher privileges than normal JS (but it is fairly complicated to set up) share | improve this answer | follow | ...
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how to use sed, awk, or gawk to print only what is matched?

...k re_format(7), specifically last paragraph of DESCRIPTION developer.apple.com/library/mac/#documentation/Darwin/Reference/… – anddam Mar 3 '13 at 16:33 ...