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Only variables should be passed by reference
...eference. This is a restriction in the PHP language, that probably exists for simplicity reasons.
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Using “Object.create” instead of “new”
...cript 1.9.3 / ECMAScript 5 introduces Object.create , which Douglas Crockford amongst others has been advocating for a long time. How do I replace new in the code below with Object.create ?
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Get battery level and state in Android
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Here is a code sample that explains how to get battery information.
To sum it up, a broadcast receiver for the ACTION_BATTERY_CHANGED intent is set up dynamically, because it can not be received through components declared in manifests, only by explicitly registering for it with Co...
Rails nested form with has_many :through, how to edit attributes of join model?
... edit the attributes of a join model when using accepts_nested_attributes_for?
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node.js fs.readdir recursive directory search
Any ideas on an async directory search using fs.readdir? I realise that we could introduce recursion and call the read directory function with the next directory to read, but am a little worried about it not being async...
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Why doesn't the example compile, aka how does (co-, contra-, and in-) variance work?
...s subtyped (alternatively, vary with subtyping, hence the "co-" prefix). More concretely:
trait List[+A]
List[Int] is a subtype of List[AnyVal] because Int is a subtype of AnyVal. This means that you may provide an instance of List[Int] when a value of type List[AnyVal] is expected. This is re...
Optimizing away a “while(1);” in C++0x
...f why this was necessary to allow?
Yes, Hans Boehm provides a rationale for this in N1528: Why undefined behavior for infinite loops?, although this is WG14 document the rationale applies to C++ as well and the document refers to both WG14 and WG21:
As N1509 correctly points out, the current d...
Fade Effect on Link Hover?
...e that when the links are hovered over, they will fade into a different color as opposed to immediately switching, the default action.
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@Media min-width & max-width
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I've found the best method is to write your default CSS for the older browsers, as older browsers including i.e. 5.5, 6, 7 and 8. Can't read @media. When I use @media I use it like this:
<style type="text/css">
/* default styles here for older browsers.
I tend to...
Concatenating multiple text files into a single file in Bash
...s the quickest and most pragmatic way to combine all *.txt file in a directory into one large text file?
12 Answers
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