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Encapsulation vs Abstraction?
...e, you see their different types of functionalities as camera, mp3 player, calling function, recording function, multimedia etc. It is abstraction, because you are seeing only relevant information instead of their internal engineering.
abstract class MobilePhone
{
public void Calling()...
Why should C++ programmers minimize use of 'new'?
... bookkeeping and the next address to allocate is implicit.
In C++, this is called automatic storage because the storage is claimed automatically at the end of scope. As soon as execution of current code block (delimited using {}) is completed, memory for all variables in that block is automatically...
How to spread django unit tests over multiple files?
...s of unittest.TestCase)
in any file whose name begins with test, automatically build a test
suite out of those test cases, and run that suite.
From Django 1.6 documentation,
Test discovery is based on the unittest module’s built-in test
discovery. By default, this will discover tests i...
How can I write output from a unit test?
Any call in my unit tests to either Debug.Write(line) or Console.Write(Line) simply gets skipped over while debugging and the output is never printed. Calls to these functions from within classes I'm using work fine.
...
What is the proper way to display the full InnerException?
...
FYI: it will not call a custom ToString methods for inner exceptions as detailed in Why doesn't System.Exception.ToString call virtual ToString for inner exceptions?.
– Jeff B
Feb 3 at 20:27
...
What's the role of adapters in Android?
...to know when , where and how adapters are used in the context of Android.
10 Answers
...
How to force table cell content to wrap?
...
<style>
table {border-collapse:collapse; table-layout:fixed; width:310px;}
table td {border:solid 1px #fab; width:100px; word-wrap:break-word;}
</style>
</head>
<body>
<table>
<tr>
<td>1</td>
<td>Lorem Ips...
Difference between SPI and API?
...
The API is the description of classes/interfaces/methods/... that you call and use to achieve a goal, and
the SPI is the description of classes/interfaces/methods/... that you extend and implement to achieve a goal.
Put differently, the API tells you what a specific class/method does for you,...
What is the fastest way to check if a class has a function defined?
...
Yes, use getattr() to get the attribute, and callable() to verify it is a method:
invert_op = getattr(self, "invert_op", None)
if callable(invert_op):
invert_op(self.path.parent_op)
Note that getattr() normally throws exception when the attribute doesn't exist. H...
Mimicking sets in JavaScript?
... the list is a little safer with this:
if (Object.prototype.hasOwnProperty.call(obj, A))
// put code here
}
because of potential conflict between built-in methods and/or properties on the base Object like the constructor property.
Sidebar on ES6: The current working version of ECMAScript 6 or ...