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How to import the class within the same directory or sub directory?
...
Python 2
Make an empty file called __init__.py in the same directory as the files. That will signify to Python that it's "ok to import from this directory".
Then just do...
from user import User
from dir import Dir
The same holds true if the files a...
Empty set literal?
...
Why?! Performance is almost identical: $ python3.7 -m timeit 'set()' 2000000 loops, best of 5: 177 nsec per loop $ python3.7 -m timeit '{*()}' 2000000 loops, best of 5: 171 nsec per loop
– ogurets
Mar 3...
What is the preferred/idiomatic way to insert into a map?
... insertion has actually been done).
From all the listed possibilities to call insert, all three are almost equivalent. As a reminder, let's have look at insert signature in the standard :
typedef pair<const Key, T> value_type;
/* ... */
pair<iterator, bool> insert(const value_type...
Understanding implicit in Scala
...t, which means the values will be taken from the context in which they are called. If there is no implicit value of the right type in scope, it will not compile. Since the implicit value must resolve to a single value and to avoid clashes, it's a good idea to make the type specific to its purpose, e...
How do I scroll the UIScrollView when the keyboard appears?
...e handling of this issue is explained. You should have a look into it.
// Call this method somewhere in your view controller setup code.
- (void)registerForKeyboardNotifications
{
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWasShown:)
...
getting the last item in a javascript object
...ate has been raging about this subject: code.google.com/p/v8/issues/detail?id=164
– Tim Down
Nov 30 '10 at 23:09
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Adding information to an exception?
...message + ' happens at %s' % arg1)
bar('arg1')
Traceback (most recent call last):
File "test.py", line 13, in <module>
bar('arg1')
File "test.py", line 11, in bar
raise type(e)(e.message + ' happens at %s' % arg1)
IOError: Stuff happens at arg1
Update 1
Here's a slight modi...
Only initializers, entity members, and entity navigation properties are supported
...
Entity is trying to convert your Paid property to SQL and can't because it's not part of the table schema.
What you can do is let Entity query the table with no Paid filter and then filter out the not Paid ones.
public ActionResult Index()
{
var debts =...
What is an existential type?
...through the Wikipedia article Existential types . I gathered that they're called existential types because of the existential operator (∃). I'm not sure what the point of it is, though. What's the difference between
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Creating the Singleton design pattern in PHP5
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/**
* Singleton class
*
*/
final class UserFactory
{
/**
* Call this method to get singleton
*
* @return UserFactory
*/
public static function Instance()
{
static $inst = null;
if ($inst === null) {
$inst = new UserFactory();
...