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Use of ~ (tilde) in R programming Language
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Ari B. FriedmanAri B. Friedman
64.3k3131 gold badges164164 silver badges225225 bronze badges
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How to check if object (variable) is defined in R?
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64
if you are inside a function, missing() is what you want.
exchequer = function(x) {
if(mis...
Why does the order of the loops affect performance when iterating over a 2D array?
...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 lot of work in the time it takes fo...
Redirect all to index.php using htaccess
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Using xampp on win 10 64 bit this is the rewrite rule that worked for my instance.
– nwolybug
Aug 11 at 21:03
add a commen...
Remove border radius from Select tag in bootstrap 3
...ackground-repeat: no-repeat;
background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA4AAAAMCAYAAABSgIzaAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAyJpVFh0WE1MOmNvbS5hZG9iZS54bXAAAAAAADw/eHBhY2tldCBiZWdpbj0i77u/IiBpZD0iVzVNME1wQ2VoaUh6cmVTek5UY3prYzlkIj8+IDx4OnhtcG1ldGEgeG...
What are the underlying data structures used for Redis?
...erence the data stored at that node. Pointers require memory (8 bytes on a 64 bit system), and so for small lists, a doubly linked list is very inefficient.
A Zip List stores elements sequentially in a Redis String. Each element has a small header that stores the length and data type of the element...
Reliable method to get machine's MAC address in C#
...s running using C#. Application will need to work on XP/Vista/Win7 32 and 64 bit as well as on those OSs but with a foreign language default. Many of the C# commands and OS queries don't work across OS. Any ideas? I have been scraping the output of "ipconfig /all" but this is terribly unreliable...
Why would you use Oracle database? [closed]
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Robert GouldRobert Gould
64.3k5757 gold badges174174 silver badges267267 bronze badges
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Value of i for (i == -i && i != 0) to return true in Java
...are byte, short, int, and long, whose values are 8-bit, 16-bit, 32-bit and 64-bit signed two's-complement integers ..."
and
"The values of the integral types are integers in the following ranges ...
For int, from -2147483648 to 2147483647, inclusive"
and the definition of the Java unar...
How do you force Visual Studio to regenerate the .designer files for aspx/ascx files?
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I recently saw that I was having the same problem. Visual Studio 2010 was refusing to update t...