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Difference between __str__ and __repr__?
......:
>>> class Sic(object):
... def __repr__(object): return 'foo'
...
>>> print str(Sic())
foo
>>> print repr(Sic())
foo
>>> class Sic(object):
... def __str__(object): return 'foo'
...
>>> print str(Sic())
foo
>>> print repr(Sic())
<...
List all sequences in a Postgres db 8.1 with SQL
... OWNED BY clause of the ALTER SEQUENCE commmand
e.g.
ALTER SEQUENCE foo_id OWNED by foo_schema.foo_table
to set it to be linked to the table foo_table
or
ALTER SEQUENCE foo_id OWNED by NONE
to break the connection between the sequence and any table
The information about this relatio...
How to pass an object into a state using UI-router?
...hristopherthielen: Yes, this should be working now in 0.2.13.
.state('foo', { url: '/foo/:param1?param2', params: { param3:
null } // null is the default value });
$state.go('foo', { param1: 'bar', param2: 'baz', param3: { id: 35,
name: 'what' } });
$stateParams in 'foo' is n...
How to make good reproducible pandas examples
...,3,4,2,1,3,1]})
assert df.equals(eval(dput(df)))
du = pd.get_dummies(df.a,"foo")
assert du.equals(eval(dput(du)))
di = df
di.index = list('abcdefgh')
assert di.equals(eval(dput(di)))
Note that this produces a much more verbose output than DataFrame.to_dict, e.g.,
pd.DataFrame({
'foo_1':pd.Seri...
Query for array elements inside JSON type
... for its elements:
WITH reports(data) AS (
VALUES ('{"objects":[{"src":"foo.png"}, {"src":"bar.png"}]
, "background":"background.png"}'::json)
)
SELECT *
FROM reports r, json_array_elements(r.data#>'{objects}') obj
WHERE obj->>'src' = 'foo.png';
The CTE (WITH query) jus...
In C, do braces act as a stack frame?
...ct outside the inner scope (but within the containing function), ie:
void foo() {
int c[100];
int *p;
{
int d[200];
p = d;
}
/* Can I access p[0] here? */
return;
}
(In other words: is the compiler allowed to deallocate d, even if in practice most don't?).
The ...
Django optional url parameters
...same view.
urlpatterns = patterns('',
url(r'^project_config/$', views.foo),
url(r'^project_config/(?P<product>\w+)/$', views.foo),
url(r'^project_config/(?P<product>\w+)/(?P<project_id>\w+)/$', views.foo),
)
Keep in mind that in your view you'll also need to set a de...
Do regular expressions from the re module support word boundaries (\b)?
...use \b in a Python string is shorthand for a backspace character.
print("foo\bbar")
fobar
So the pattern "\btwo\b" is looking for a backspace, followed by two, followed by another backspace, which the string you're searching in (x = 'one two three') doesn't have.
To allow re.search (or compile)...
Class method decorator with self arguments?
...*method_kwargs)
return method_output + "!"
return _impl
class Foo:
@wrapper
def bar(self, word):
return word
f = Foo()
result = f.bar("kitty")
print(result)
Which will print:
kitty!
share
...
Return multiple values in JavaScript?
...e the return values in an object and pick out the ones you want:
let {baz, foo} = (function(){ return {foo: 3, bar: 500, baz: 40} })();
baz; // 40
foo; // 3
And by the way, don't be fooled by the fact that ECMAScript allows you to return 1, 2, .... What really happens there is not what might seem. ...