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Internal vs. Private Access Modifiers
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@Dan yeah, i assumed it would just act as a truth table and AND that matrix to true|false|false|false for protected internal. not intuitive. instead it's true|true|true|false as if OR'd.
– ferr
May 29 '17 at 21:49
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Inheritance and Overriding __init__ in python
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The book is a bit dated with respect to subclass-superclass calling. It's also a little dated with respect to subclassing built-in classes.
It looks like this nowadays:
class FileInfo(dict):
"""store file metadata"""
def __init__(self, filename=None):
super(FileInfo,...
RegEx to extract all matches from string using RegExp.exec
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@madprog, Right, it's the easiest way but not suitable when the group values are essential.
– Anis
Sep 13 '17 at 10:02
1
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Define a lambda expression that raises an Exception
...ur goal is to avoid a def, this obviously doesn't cut it. It does, however allow you to conditionally raise exceptions, e.g.:
y = lambda x: 2*x if x < 10 else raise_(Exception('foobar'))
Alternatively you can raise an exception without defining a named function. All you need is a strong stom...
Responsively change div size keeping aspect ratio [duplicate]
...oat the parent container. */
.square:after {
content: "";
display: table;
clear: both;
}
</style>
<div class="square">
<h1>Square</h1>
<p>This div will maintain its aspect ratio.</p>
</div>
I've put together a demo here: http://codepen.io/t...
Is it ever advantageous to use 'goto' in a language that supports loops and functions? If so, why?
...o this already):
Cleanly exiting a function
Often in a function, you may allocate resources and need to exit in multiple places. Programmers can simplify their code by putting the resource cleanup code at the end of the function, and all "exit points" of the function would goto the cleanup label....
Why does pycharm propose to change method to static
...ed to return a value depending on self. In this case the warning is neglectable, and I mark it with # noinspection PyMethodMayBeStatic. It's a pitty that IntelliJ IDEA doesn't offer adding this disabling comment in the context menus for this warning.
– Alfe
D...
What does the “yield” keyword do?
... list, you can read its items one by one. Reading its items one by one is called iteration:
>>> mylist = [1, 2, 3]
>>> for i in mylist:
... print(i)
1
2
3
mylist is an iterable. When you use a list comprehension, you create a list, and so an iterable:
>>> mylist = [...
How do I enlarge an EER Diagram in MySQL Workbench?
... Hahah best thing ever "Save your work as this may crash". How stable software do they write?
– danger89
Feb 19 '18 at 21:17
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Check if $_POST exists
...sts and if it does, print it inside another string, if not, don't print at all.
14 Answers
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