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correct way to use super (argument passing)
...in common. In that case, you can't pop the key-value pairs off of **kwargs or remove them from *args. Instead, you can define a Base class which unlike object, absorbs/ignores arguments:
class Base(object):
def __init__(self, *args, **kwargs): pass
class A(Base):
def __init__(self, *args, ...
How to disallow temporaries
For a class Foo, is there a way to disallow constructing it without giving it a name?
10 Answers
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Chrome Dev Tools: How to trace network for a link that opens a new tab?
I want to trace the network activity that happens when I click on a link. The problem is that the link opens a new tab, and apparently the Dev Tools works per tab it was open for. "Preserve Log Upon Navigation" does not help.
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Centering a div block without the width
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Update 27 Feb 2015: My original answer keeps getting voted up, but now I normally use @bobince's approach instead.
.child { /* This is the item to center... */
display: inline-block;
}
.parent { /* ...and this is its parent container. */
text-...
'id' is a bad variable name in Python
...ue among
simultaneously existing objects. (Hint: it's the object's memory
address.)
In general, using variable names that eclipse a keyword or built-in function in any language is a bad idea, even if it is allowed.
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Does the Java &= operator apply & or &&?
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From the Java Language Specification - 15.26.2 Compound Assignment Operators.
A compound assignment expression of the form E1 op= E2 is equivalent to E1 = (T)((E1) op (E2)), where T is the type of E1, except that E1 is evaluated only once.
So a &= b; is equivalent to a = a & b;.
(In...
What does Expression.Quote() do that Expression.Constant() can’t already do?
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Short answer:
The quote operator is an operator which induces closure semantics on its operand. Constants are just values.
Quotes and constants have different meanings and therefore have different representations in an expres...
Which characters make a URL invalid?
...ctions about what characters need to be represented by an percent-encoded word.
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Encode html entities in javascript
I am working in a CMS which allows users to enter content. The problem is that when they add symbols ® , it may not display well in all browsers. I would like to set up a list of symbols that must be searched for, and then converted to the corresponding html entity. For example
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Use of exit() function
...it(0); instead. The exit function expects an integer parameter. And don't forget to #include <stdlib.h>.
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