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How do I iterate through each element in an n-dimensional matrix in MATLAB?
...st assume you have a function that you want to apply to each element of A (called my_func). You first create a function handle to this function:
fcn = @my_func;
If A is a matrix (of type double, single, etc.) of arbitrary dimension, you can use arrayfun to apply my_func to each element:
outArgs ...
Using boolean values in C
...has the benefit of being standardized.
Whatever the boolean constants are called, use them only for initialization. Never ever write something like
if (ready == TRUE) ...
while (empty == FALSE) ...
These can always be replaced by the clearer
if (ready) ...
while (!empty) ...
Note that these...
Why does the order of the loops affect performance when iterating over a 2D array?
...ches. Data from your memory gets brought over to the CPU in little chunks (called 'cache lines'), typically 64 bytes. If you have 4-byte integers, that means you're geting 16 consecutive integers in a neat little bundle. It's actually fairly slow to fetch these chunks of memory; your CPU can do a lo...
How to find index of list item in Swift?
...ex(where: {$0 === person1})
Swift 4 / Swift 3 - the function used to be called index
Swift 2 - the function used to be called indexOf
* Note the relevant and useful comment by paulbailey about class types that implement Equatable, where you need to consider whether you should be comparing usin...
Split array into chunks
...ove is a not-that-elegant (in my mind) workaround to use Array.map. It basically does the following, where ~ is concatenation:
[[1,2,3]]~[]~[]~[] ~ [[4,5,6]]~[]~[]~[] ~ [[7]]
It has the same asymptotic running time as the method below, but perhaps a worse constant factor due to building empty lis...
Redefine tab as 4 spaces
...lanks on a <Tab> key (as per sw, ts and sts).
endfunction
Usage:
:call UseTabs()
:call UseSpaces()
To use it per file extensions, the following syntax can be used (added to .vimrc):
au! BufWrite,FileWritePre *.module,*.install call UseSpaces()
See also: Converting tabs to spaces.
He...
When are you supposed to use escape instead of encodeURI / encodeURIComponent?
...llowed.
encodeURI()
Use encodeURI when you want a working URL. Make this call:
encodeURI("http://www.example.org/a file with spaces.html")
to get:
http://www.example.org/a%20file%20with%20spaces.html
Don't call encodeURIComponent since it would destroy the URL and return
http%3A%2F%2Fwww.ex...
Reliable method to get machine's MAC address in C#
...
Optimization note: You could call FirstOrDefault before the final Select. This way, it would only get physical address and serialize it for the actual NetworkInterface that you get. Don't forget to add the null check (?) after the FirstOrDefault.
...
What is the difference between canonical name, simple name and class name in Java Class?
... upshot looking at this is:
the name is the name that you'd use to dynamically load the class with, for example, a call to Class.forName with the default ClassLoader. Within the scope of a certain ClassLoader, all classes have unique names.
the canonical name is the name that would be used in an i...
How do I save a stream to a file in C#?
...
Note that you have to call myOtherObject.InputStream.Seek(0, SeekOrigin.Begin) if you're not already at the beginning or you won't copy the entire stream.
– Steve Rukuts
Mar 22 '12 at 12:00
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