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How can I get the intersection, union, and subset of arrays in Ruby?
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Utilizing the fact that you can do set operations on arrays by doing &(intersection), -(difference), and |(union).
Obviously I didn't implement the MultiSet to spec, but this should get you started:
class MultiSet
attr_accessor :set
def initialize...
Is it possible to have multiple styles inside a TextView?
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In case, anyone is wondering how to do this, here's one way: (Thanks to Mark again!)
mBox = new TextView(context);
mBox.setText(Html.fromHtml("<b>" + title + "</b>" + "<br />" +
"<small>" + description + "</small>" +...
How to select from subquery using Laravel Query Builder?
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In addition to @delmadord's answer and your comments:
Currently there is no method to create subquery in FROM clause, so you need to manually use raw statement, then, if necessary, you will merge all the bindings:
$sub = Abc::where(..)->grou...
convert a char* to std::string
I need to use an std::string to store data retrieved by fgets() . To do this I need to convert the char* return value from fgets() into an std::string to store in an array. How can this be done?
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Input widths on Bootstrap 3
...s without really understanding the question. In reality there is no way to do it with the build in functionality without using grid or adding extra css. Grids do not work well if you are dealing with help-block elements that need to go beyond a short input for example but they are 'build-in'. If t...
Quickest way to convert XML to JSON in Java [closed]
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Warning: The json.org.XML package does not exist in Android!
– Ludovic Landry
Nov 25 '11 at 14:49
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Listening for variable changes in JavaScript
...using accessors (getters and setters): https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_Objects#Defining_getters_and_setters
You can define an object like this, in which aInternal represents the field a:
x = {
aInternal: 10,
aListener: function(val) {},
set a(val) {...
When should I use the Visitor Design Pattern? [closed]
...g references to the visitor pattern in blogs but I've got to admit, I just don't get it. I read the wikipedia article for the pattern and I understand its mechanics but I'm still confused as to when I'd use it.
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Which is better option to use for dividing an integer number by 2?
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Use the operation that best describes what you are trying to do.
If you are treating the number as a sequence of bits, use bitshift.
If you are treating it as a numerical value, use division.
Note that they are not exactly equivalent. They can give different results for negative in...
What does the * * CSS selector do?
...t — in other words, any element that isn't the root element of the whole document.
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