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When is it appropriate to use UDP instead of TCP? [closed]
... of the issues imposed by UDP (packet loss, packet doubling, packet order, etc.) already mentioned in other answers. There are rarely any problems, but they do sometimes occur and so must be handled. The benefit to supporting UDP is that we are able to customize it a bit to our own usage and tweak...
Difference between DTO, VO, POJO, JavaBeans?
...licitly define an assembly phase where all data to be used by the view is fetched and marshalled into the DTOs before returning control to the presentation tier.
So, for many people, DTOs and VOs are the same thing (but Fowler uses VOs to mean something else as we saw). Most of time, they follow...
Getting a list of associative array keys
...ck note. Be wary of using for..in if you use a library (jQuery, Prototype, etc.), as most of them add methods to created Objects (including dictionaries).
This will mean that when you loop over them, method names will appear as keys. If you are using a library, look at the documentation and look for...
How to view UTF-8 Characters in VIM or Gvim
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In Linux, Open the VIM configuration file
$ sudo -H gedit /etc/vim/vimrc
Added following lines:
set fileencodings=utf-8,ucs-bom,gb18030,gbk,gb2312,cp936
set termencoding=utf-8
set encoding=utf-8
Save and exit, and terminal command:
$ source /etc/vim/vimrc
At this time VIM wil...
How can I display just a portion of an image in HTML/CSS?
...he image you want to display as a background in a container (td, div, span etc) and then adjust background-position to get the sprite you want.
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What's the difference between design patterns and architectural patterns?
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It requires a detailed explanation but I will try to sketch the differences to best of my knowledge.
Patterns are distilled commonality that you find in programs. It allows us to deconstruct a large complex structure and build using simple parts. It provides a general solution f...
Add leading zeroes to number in Java? [duplicate]
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(1) That's going to return 0num0num0num etc, instead of 00000num (2) Lots of string concatenations with "+" are a bad idea performance-wise. Better to preallocate a StringBuffer or StringBuilder of length 'digits'
– Nate Parsons
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How do I look inside a Python object?
...veniences, like tab completion, pretty printing of results, result history etc. that make it very handy for this sort of exploratory programming.
For more programmatic use of introspection, the basic builtins like dir(), vars(), getattr etc will be useful, but it is well worth your time to check ou...
String comparison in Python: is vs. == [duplicate]
...or all built-in Python objects (like
strings, lists, dicts, functions,
etc.), if x is y, then x==y is also
True.
Not always. NaN is a counterexample. But usually, identity (is) implies equality (==). The converse is not true: Two distinct objects can have the same value.
Also, is it g...
What is the MySQL JDBC driver connection string?
...("com.mysql.jdbc.Driver").newInstance ();
Connection conn = DriverManager.getConnection (url, "username", "password");
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