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What are the differences between Generics in C# and Java… and Templates in C++? [closed]
... to pass this down to the virtual machine. The only way to tell it this is by either hard-coding the actual class in, or using interfaces. For example:
string addNames<T>( T first, T second ) { return first.Name() + second.Name(); }
That code won't compile in C# or Java, because it doesn't kn...
What is the dependency inversion principle and why is it important?
...bstractions.
As to why it is important, in short: changes are risky, and by depending on a concept instead of on an implementation, you reduce the need for change at call sites.
Effectively, the DIP reduces coupling between different pieces of code. The idea is that although there are many ways o...
Ignore .pyc files in git repository
...se, git treats the pattern as a shell glob suitable for
consumption by fnmatch(3) with the FNM_PATHNAME flag: wildcards in
the pattern will not match a / in the pathname. For example,
"Documentation/*.html" matches "Documentation/git.html" but not
"Documentation/ppc/ppc.h...
How to override equals method in Java
...
//Written by K@stackoverflow
public class Main {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
ArrayList<Person> pe...
mmap() vs. reading blocks
... they were in the past, the overall performance can't really be determined by adding up the pros and cons, but only by testing on a particular hardware configuration. For example, it is debatable that "A call to mmap has more overhead than read" - yes mmap has to add mappings to the process page tab...
How can I scan barcodes on iOS?
...
ZXing for iPhone has still memory leaks by 1.7 ver.
– Yoon Lee
Sep 8 '11 at 17:08
I...
Why is the time complexity of both DFS and BFS O( V + E )
...or each vertex
DFS runs in O(n + m) time provided the graph is represented by the adjacency list structure
Recall that Σv deg(v) = 2m
BFS(analysis):
Setting/getting a vertex/edge label takes O(1) time
Each vertex is labeled twice
once as UNEXPLORED
once as VISITED
Each edge is labeled twice
...
Is there a splice method for strings?
... + (add || "") + str.slice(index + count);
}
than using a split followed by a join (Kumar Harsh's method), like this:
function spliceSplit(str, index, count, add) {
var ar = str.split('');
ar.splice(index, count, add);
return ar.join('');
}
Here's a jsperf that compares the two and a coup...
Get java.nio.file.Path object from java.io.File
...
Yes, you can get it from the File object by using File.toPath(). Keep in mind that this is only for Java 7+. Java versions 6 and below do not have it.
share
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impro...
Case-insensitive search in Rails model
...put. "#$$" is a little-known shortcut for escaping global variables with Ruby string interpolation. It's equivalent to "#{$$}". But string interpolation doesn't happen to user-input strings. Try these in Irb to see the difference: "$##" and '$##'. The first is interpolated (double-quotes). The secon...