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How can you diff two pipelines in Bash?
...
A one-line with 2 tmp files (not what you want) would be:
foo | bar > file1.txt && baz | quux > file2.txt && diff file1.txt file2.txt
With bash, you might try though:
diff <(foo | bar) <(baz | quux)
foo | bar | diff - <(baz | quux) # or only use...
How do I write good/correct package __init__.py files
... start. I think it's best to leave __init__.py files empty.
for example:
foo.py - contains classes related to foo such as fooFactory, tallFoo, shortFoo
then the app grows and now it's a whole folder
foo/
__init__.py
foofactories.py
tallFoos.py
shortfoos.py
mediumfoos.py
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MongoDB: update every document on one field
I have a collected named foo hypothetically.
4 Answers
4
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How to “perfectly” override a dict?
...ndant __dict__ - therefore taking up more space in memory:
>>> s.foo = 'bar'
>>> s.__dict__
{'foo': 'bar', 'store': {'test': 'test'}}
Actually subclassing dict
We can reuse the dict methods through inheritance. All we need to do is create an interface layer that ensures keys...
Prevent HTML5 video from being downloaded (right-click saved)?
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People could record their entire screen and audio and fool all workarounds, that is why they can only be slowed down.
– kintsukuroi
Apr 28 at 6:11
1
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How do I create a class instance from a string name in ruby?
...re ruby:
clazz = Object.const_get('ExampleClass')
with modules:
module Foo
class Bar
end
end
you would use
> clazz = 'Foo::Bar'.split('::').inject(Object) {|o,c| o.const_get c}
=> Foo::Bar
> clazz.new
=> #<Foo::Bar:0x0000010110a4f8>
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When should I make explicit use of the `this` pointer?
...A {
int i;
};
template<class T>
struct B : A<T> {
int foo() {
return this->i;
}
};
int main() {
B<int> b;
b.foo();
}
If you omit this->, the compiler does not know how to treat i, since it may or may not exist in all instantiations of A. In or...
function declaration isn't a prototype
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In C int foo() and int foo(void) are different functions. int foo() accepts an arbitrary number of arguments, while int foo(void) accepts 0 arguments. In C++ they mean the same thing. I suggest that you use void consistently when you ...
is_null($x) vs $x === null in PHP [duplicate]
...is_null or === null. But be aware when using isset on arrays.
$a = array('foo' => null);
var_dump(isset($a['foo'])); // false
var_dump(is_null($a['foo'])); // true
var_dump(array_key_exists('foo', $a)); // true
share
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What is the difference between “ is None ” and “ ==None ”
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class Foo:
def __eq__(self,other):
return True
foo=Foo()
print(foo==None)
# True
print(foo is None)
# False
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