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How to call a Parent Class's method from Child Class in Python?
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Yes, but only with new-style classes. Use the super() function:
class Foo(Bar):
def baz(self, arg):
return super().baz(arg)
For python < 3, use:
class Foo(Bar):
def baz(self, arg):
return super(Foo, self).baz(arg)
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How do you normalize a file path in Bash?
I want to transform /foo/bar/.. to /foo
22 Answers
22
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How to initialize static variables
...ork around this by adding code right after definition of the class:
class Foo {
static $bar;
}
Foo::$bar = array(…);
or
class Foo {
private static $bar;
static function init()
{
self::$bar = array(…);
}
}
Foo::init();
PHP 5.6 can handle some expressions now.
/* For Abstrac...
How to check if a Ruby object is a Boolean
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Simplest way I can think of:
# checking whether foo is a boolean
!!foo == foo
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What is global::?
...used to solve problems whereby you may redefine types. For example:
class foo
{
class System
{
}
}
If you were to use System where it would be locally scoped in the foo class, you could use:
global::System.Console.WriteLine("foobar");
to access the global namespace.
Example
usi...
Why are mutable structs “evil”?
...o lose changes quite easily... for example, getting things out of a list:
Foo foo = list[0];
foo.Name = "abc";
what did that change? Nothing useful...
The same with properties:
myObj.SomeProperty.Size = 22; // the compiler spots this one
forcing you to do:
Bar bar = myObj.SomeProperty;
bar.S...
jQuery access input hidden value
...t like you can do on any other input element:
<input type="hidden" id="foo" name="zyx" value="bar" />
alert($('input#foo').val());
alert($('input[name=zyx]').val());
alert($('input[type=hidden]').val());
alert($(':hidden#foo').val());
alert($('input:hidden[name=zyx]').val());
Those all mea...
Is there a benefit to defining a class inside another class in Python?
...r class. For example to use a metaclass, it's sometimes handy to do
class Foo(object):
class __metaclass__(type):
....
instead of defining a metaclass separately, if you're only using it once.
The only other time I've used nested classes like that, I used the outer class only as a n...
How do I copy a folder from remote to local using scp? [closed]
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scp -r user@your.server.example.com:/path/to/foo /home/user/Desktop/
By not including the trailing '/' at the end of foo, you will move the directory itself (including contents), rather than only the contents of the directory.
From man scp (See online manual)
-r ...
What's the difference between CSS classes .foo.bar (without space) and .foo .bar (with space) [dupli
Would you please explain me the difference between these two CSS classes syntax:
5 Answers
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