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Ruby: Easiest Way to Filter Hash Keys?
...n use the select method. You'll need to convert the key from a Symbol to a String to do the regexp match. This will give you a new Hash with just the choices in it.
choices = params.select { |key, value| key.to_s.match(/^choice\d+/) }
or you can use delete_if and modify the existing Hash e.g.
pa...
HTML entity for the middle dot
...
There's actually six variants of this:
char description unicode html html entity utf-8
· Middle Dot U+00B7 · · C2 B7
• Bullet U+2022 • • ...
What is the optimal algorithm for the game 2048?
...sed around in a single machine register.
Bit shift operations are used to extract individual rows and columns. A single row or column is a 16-bit quantity, so a table of size 65536 can encode transformations which operate on a single row or column. For example, moves are implemented as 4 lookups in...
var.replace is not a function
I'm using the below code to try to trim the string in Javascript but am getting the error mentioned in the title:
10 Answer...
Converting from IEnumerable to List [duplicate]
...rrayList();
_provinces.Add("Western");
_provinces.Add("Eastern");
List<string> provinces = _provinces.Cast<string>().ToList();
If you're using Generic version IEnumerable<T>, The conversion is straight forward. Since both are generics, you can do like below,
IEnumerable<in...
Is Meyers' implementation of the Singleton pattern thread safe?
...ingleton& instance()
{
static bool initialized = false;
static char s[sizeof( Singleton)];
if (!initialized) {
initialized = true;
new( &s) Singleton(); // call placement new on s to construct it
}
return (*(reinterpret_cast<Singleton*>( &s)))...
How to decide between MonoTouch and Objective-C? [closed]
..., then Apple's stack wins this one.
Doing any XML work? MonoTouch. Period.
String manipulation? Date manipulation? A million other little things we've gotten used to with .Net's everything-AND-the-kitchen-sink frameworks? MonoTouch.
Web services? MonoTouch.
Syntactically, they both have their advant...
Plotting time in Python with Matplotlib
...ar is set to 1990": Could you please post the code you use to convert from string to datetime? Something might be wrong with the conversion. Re. the formatting of chart labels, see the date_demo1 link provided by J. K. Seppänen. The matplot lib documentation is excellent, BTW. matplotlib.sourceforg...
Open a URL in a new tab (and not a new window)
...ecessary, for window.open(), the second parameter is strWindowName, for: A string name for the new window. The name can be used as the target of links and forms using the target attribute of an <a> or <form> element. The name should not contain any whitespace characters. Note that strWin...
Recursive sub folder search and return files in a list python
...cts, which you can use for pretty much anything, or get the file name as a string by file.name.
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