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When should I use RequestFactory vs GWT-RPC?
...s this will allow your marshaling utilities to translate between your json/xml and java models. Using RPC also allows you to implement more robust architecture, as quoted from the gwt dev section on Google's website.
"Simple Client/Server Deployment
The first and most straightforward way to think ...
What is an EJB, and what does it do?
...-based access control to EJBs can be configured via a simple annotation or XML
setting. The server automatically passes the authenticated user details along with each
call as security context (the calling principal and role). It ensures that all RBAC
rules are automatically enforced so that met...
Use C++ with Cocoa Instead of Objective-C?
...described above. Currently dynamically typed, runtime-bound languages like Python, Ruby, etc. are the only real option for writing a Cocoa app without Objective-C (though of course these bridges use Objective-C under the hood).
...
How do you make a web application in Clojure? [closed]
...orld. I never made a web app from scratch in Java. If I have to do it with Python, Ruby, I know where to go (Django or Rails), but if I want to make a web application in Clojure, not because I'm forced to live in a Java world, but because I like the language and I want to give it a try, what librari...
Singleton: How should it be used
... variable until the first time that variable is needed.
Languages such as Python and Ruby use singletons very little because you can use global variables within a module instead.
So when is it good/bad to use a singleton? Pretty much exactly when it would be good/bad to use a global variable.
...
How can I convert spaces to tabs in Vim or Linux?
...bulate the whole file
Before doing anything like this (particularly with Python files!), I usually set 'list', so that I can see the whitespace and change.
I have the following mapping in my .vimrc for this:
nnoremap <F2> :<C-U>setlocal lcs=tab:>-,trail:-,eol:$ list! list? <...
What is recursion and when should I use it?
...anguage implementations (i.e. every major implementation of C, C++, Basic, Python, Ruby,Java, and C#) iteration is vastly preferable to recursion.
To see why, walk through the steps that the above languages use to call a function:
space is carved out on the stack for the function's arguments and ...
What is meant by 'first class object'?
...
Simple test. If you can do this in your language (Python as example):
def double(x):
return x*x
f = double
print f(5) #prints 25
Your language is treating functions as first class objects.
s...
How to remove frame from matplotlib (pyplot.figure vs matplotlib.figure ) (frameon=False Problematic
...s a TypeError: write() argument must be str, not bytes exception for me on python 3. Opening the file as write binary ('wb') is needed for it to work.
– Gabriel Jablonski
Nov 3 '19 at 22:18
...
Why are joins bad when considering scalability?
...e structured data (you could do that with flat file constructs like csv or xml). A few of the options I listed will even let you completely build your join in advance, so the results are already done before you issue the query — just as if you had denormalized the data (admittedly at the cost of s...