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Polymorphism in C++
...onst Duck& x) { x.walk().swim().quack(); }
do_ducky_stuff(Vilified_Cygnet());
Subtype (aka inclusion) polymorphism allows you to work on new types without updating the algorithm/function, but they must be derived from the same base class (virtual dispatch)
1 - Templates are extremely flexi...
How does the “this” keyword work?
...
But, jsfiddle.net/H4LYm/2 shows that the setTimeout example has a this of window(global).
– Kevin Meredith
Dec 31 '13 at 22:20
...
Is it possible to apply CSS to half of a character?
...ind or visually
impaired
Part 1: Basic Solution
Demo: http://jsfiddle.net/arbel/pd9yB/1694/
This works on any dynamic text, or a single character, and is all automated. All you need to do is add a class on the target text and the rest is taken care of.
Also, the accessibility of the origina...
Maximum single-sell profit
...sider all O(n^2) pairs
# of values, and then pick the one with the highest net profit. There are
# exactly n + (n - 1) + (n - 2) + ... + 1 = n(n + 1)/2 different pairs to pick
# from, so this algorithm will grow quadratically in the worst-case. However,
# it uses only O(1) memory, which is a somew...
How to detect a Christmas Tree? [closed]
...produce good results in other cases also. You could experiment with neural nets for clustering. Something like a SOM or neural gas would do excellent work. Nevertheless, great proposal and thumbs up from me!
– sepdek
Dec 31 '13 at 9:47
...
What does “coalgebra” mean in the context of programming?
...ms and properties since they are more complex and abstract than needed.
Nonetheless, the fact that, say, (IntList, Nil|Cons) is F-algebra allows us to define fold-like function on this type. As you know, fold is a kind of operation which transforms some recursive datatype in one finite value. For e...
How to make a chain of function decorators?
...e():
from urllib import urlopen
result = urlopen("http://subfusion.net/cgi-bin/quote.pl?quote=futurama").read()
try:
value = result.split("<br><b><hr><br>")[1].split("<br><br><hr>")[0]
return value.strip()
except:
retu...
What are Aggregates and PODs and how/why are they special?
... a more or less portable dynamic library that can be used from C and even .NET, you should try to make all your exported functions take and return only parameters of POD-types.
The lifetime of objects of non-POD class type begins when the constructor has finished and ends when the destructor has fin...
How to programmatically create and read WEP/EAP WiFi configurations in Android?
...;
boolean res1 = wifiManag.setWifiEnabled(true);
int res = wifi.addNetwork(wc);
Log.d("WifiPreference", "add Network returned " + res );
boolean es = wifi.saveConfiguration();
Log.d("WifiPreference", "saveConfiguration returned " + es );
boolean b = wifi.enableNetwork(res, tr...
Split string into an array in Bash
...ds "split" and "words" a lot. Here's a relevant excerpt from the linux.die.net version of the bash manual:
Expansion is performed on the command line after it has been split into words. There are seven kinds of expansion performed: brace expansion, tilde expansion, parameter and variable expansi...