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HTML5 best practices; section/header/aside/article elements
...elements, always ask yourself: “Is it possible to read it independently from the rest of the web site?”
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C pointers : pointing to an array of fixed size
...n array or a struct. You can switch the definition of Vector3d at any time from an array to a struct and back, and you won't have to change the function declaration. In either case the functions will receive an aggregate object "by reference" (there are exceptions to this, but within the context of ...
What are all the uses of an underscore in Scala?
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Example showing why foo(_) and foo _ are different:
This example comes from 0__:
trait PlaceholderExample {
def process[A](f: A => Unit)
val set: Set[_ => Unit]
set.foreach(process _) // Error
set.foreach(process(_)) // No Error
}
In the first case, process _ represents a met...
NGINX to reverse proxy websockets AND enable SSL (wss://)?
... spanking new nginx_tcp_proxy_module
Written in August 2012, so if you are from the future you should do your homework.
Prerequisites
Assumes you are using CentOS:
Remove current instance of NGINX (suggest using dev server for this)
If possible, save your old NGINX config files so you can re-use th...
log4j: Log output of a specific class to a specific appender
... @dwjohnston setting additivity to false will prevent the logger from logging to the appenders of it's ancestors (it's true by default), In this case, had the additivity been left to true, logging to the Baz appender would have written to both files.
– Maurice Perry
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Unpacking array into separate variables in JavaScript
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You should really use var to prevent the variables from polluting the global scope.
– Mathias Bynens
Aug 6 '10 at 9:25
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Check whether an array is empty [duplicate]
...)) {
}
array_filter() function's default behavior will remove all values from array which are equal to null, 0, '' or false.
Otherwise in your particular case empty() construct will always return true if there is at least one element even with "empty" value.
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Android Studio: Android Manifest doesn't exists or has incorrect root tag
...ue for both Android Studio and Intelli J. Sometime when you import project from existing sources it prefer the manifest file inside the generates sources directory.
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Why should I prefer to use member initialization lists?
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Apart from the performance reasons mentioned above, if your class stores references to objects passed as constructor parameters or your class has const variables then you don't have any choice except using initializer lists.
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When is CRC more appropriate to use than MD5/SHA1?
...ks fine for detecting random errors in data that might occur, for example, from network interference, line noise, distortion, etc.
CRC is computationally much less complex than MD5 or SHA1. Using a hash function like MD5 is probably overkill for random error detection. However, using CRC for any ki...