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How to get all subsets of a set? (powerset)
...deally a set) into a list because by a set is a data structure of unique unordered elements, and the order will be crucial to generate the subsets.
selector is key in this algorithm. Note that selector has the same length as the input set, and to make this possible it is using an f-string with padd...
How to use PHP OPCache?
...e is compiled by default on PHP5.5+. However it is disabled by default. In order to start using OpCache in PHP5.5+ you will first have to enable it. To do this you would have to do the following.
Add the following line to your php.ini:
zend_extension=/full/path/to/opcache.so (nix)
zend_extension=C...
Can I make a pull request on a gist on GitHub?
...t happens.
I recommend instead creating one regular repo called gists and ordering your gists into regular folders.
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When is it practical to use Depth-First Search (DFS) vs Breadth-First Search (BFS)? [closed]
...istribute even between connected machines if you don't insist on the exact order of visiting the nodes.
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Virtual functions and performance - C++
...stion made me curious, so I went ahead and ran some timings on the 3GHz in-order PowerPC CPU we work with. The test I ran was to make a simple 4d vector class with get/set functions
class TestVec
{
float x,y,z,w;
public:
float GetX() { return x; }
float SetX(float to) { return x=to; }...
Fixing the order of facets in ggplot
...e) to facet_grid(.~size_f)
Then plot:
The graphs are now in the correct order.
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How to know when UITableView did scroll to bottom in iPhone
I would like to know when a UITableView did scroll to bottom in order to load and show more content, something like a delegate or something else to let the controller know when the table did scroll to bottom.
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What is a practical use for a closure in JavaScript?
...clude:
Passing parameterised behaviour into an algorithm (classic higher-order programming):
function proximity_sort(arr, midpoint) {
arr.sort(function(a, b) { a -= midpoint; b -= midpoint; return a*a - b*b; });
}
Simulating object oriented programming:
function counter() {
var a = 0;
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Write text files without Byte Order Mark (BOM)?
...to do this?
I can write file with UTF8 encoding but, how to remove Byte Order Mark from it?
9 Answers
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Use of var keyword in C#
... make code more readable in some cases. If I have a Customer class with an Orders property, and I want to assign that to a variable, I will just do this:
var orders = cust.Orders;
I don't care if Customer.Orders is IEnumerable<Order>, ObservableCollection<Order> or BindingList<Orde...