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Class method differences in Python: bound, unbound and static
...descriptor system. Imagine the following class:
class C(object):
def foo(self):
pass
Now let's have a look at that class in the shell:
>>> C.foo
<unbound method C.foo>
>>> C.__dict__['foo']
<function foo at 0x17d05b0>
As you can see if you access the ...
File name? Path name? Base name? Naming standard for pieces of a path
..., well-known programs:
A) C:\users\OddThinking\Documents\My Source\Widget\foo.src
Vim calls it file root (:help filename-modifiers)
B) C:\users\OddThinking\Documents\My Source\Widget\foo.src
file name or base name
C) C:\users\OddThinking\Documents\My Source\Widget\foo.src (without dot)
...
Does Python have a string 'contains' substring method?
...ge, and
other Python programmers will expect you to use it.
>>> 'foo' in '**foo**'
True
The opposite (complement), which the original question asked for, is not in:
>>> 'foo' not in '**foo**' # returns False
False
This is semantically the same as not 'foo' in '**foo**' but it's ...
What does the explicit keyword mean?
... class with a constructor that can be used for implicit conversions:
class Foo
{
public:
// single parameter constructor, can be used as an implicit conversion
Foo (int foo) : m_foo (foo)
{
}
int GetFoo () { return m_foo; }
private:
int m_foo;
};
Here's a simple function that takes a...
What are some good Python ORM solutions? [closed]
...
Storm has arguably the simplest API:
from storm.locals import *
class Foo:
__storm_table__ = 'foos'
id = Int(primary=True)
class Thing:
__storm_table__ = 'things'
id = Int(primary=True)
name = Unicode()
description = Unicode()
foo_id = Int()
foo = Reference(foo...
std::next_permutation Implementation Explanation
I was curious how std:next_permutation was implemented so I extracted the the gnu libstdc++ 4.7 version and sanitized the identifiers and formatting to produce the following demo...
...
What's the difference between @JoinColumn and mappedBy when using a JPA @OneToMany association
...
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Using Java to find substring of a bigger string using Regular Expression
...u could use something like the following:
Matcher m = MY_PATTERN.matcher("FOO[BAR]");
while (m.find()) {
String s = m.group(1);
// s now contains "BAR"
}
share
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...
How do you pass arguments to define_method?
...
... and if you want optional parameters
class Bar
define_method(:foo) do |arg=nil|
arg
end
end
a = Bar.new
a.foo
#=> nil
a.foo 1
# => 1
... as many argument...
How to find all the subclasses of a class given its name?
...ython 3) have a __subclasses__ method which returns the subclasses:
class Foo(object): pass
class Bar(Foo): pass
class Baz(Foo): pass
class Bing(Bar): pass
Here are the names of the subclasses:
print([cls.__name__ for cls in Foo.__subclasses__()])
# ['Bar', 'Baz']
Here are the subclasses thems...