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Why doesn't String switch statement support a null case?
...s' intentions.
If we rather look at implementation details, this blog post by Christian Hujer has some insightful speculation about why null isn't allowed in switches (although it centers on the enum switch rather than the String switch):
Under the hood, the switch statement will typically compile ...
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...
Is there any “font smoothing” in Google Chrome?
...here IS a real solution for this when self-hosting the fonts, first posted by Jaime Fernandez in another answer on this Stackoverflow page, which fixes this issue by loading web fonts in a special order. I would feel bad to simply copy his excellent answer, so please have a look there. There is also...
Using CSS in Laravel views?
...ow for Laravel 5.0 where the illuminate/html package is no longer included by default laracasts.com/series/laravel-5-fundamentals/episodes/10 for details
– dangel
May 20 '15 at 2:23
...
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...
Why is reading lines from stdin much slower in C++ than Python?
... Because of different default settings in C++ requiring more system calls.
By default, cin is synchronized with stdio, which causes it to avoid any input buffering. If you add this to the top of your main, you should see much better performance:
std::ios_base::sync_with_stdio(false);
Normally, whe...
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
...