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Why is Multiple Inheritance not allowed in Java or C#?
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The short answer is: because the language designers decided not to.
Basically, it seemed that both the .NET and Java designers did not allow multiple inheritance because they reasoned that adding MI added too much complexity to th...
django unit tests without a db
...ate a custom test suit runner similar to this:
from django.test.simple import DjangoTestSuiteRunner
class NoDbTestRunner(DjangoTestSuiteRunner):
""" A test runner to test without database creation """
def setup_databases(self, **kwargs):
""" Override the database creation defined in paren...
What is the meaning of id?
...to any type, but unlike void * it always points to an Objective-C object. For example, you can add anything of type id to an NSArray, but those objects must respond to retain and release.
The compiler is totally happy for you to implicitly cast any object to id, and for you to cast id to any object...
Significance of a .inl file in C++
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.inl files are never mandatory and have no special significance to the compiler. It's just a way of structuring your code that provides a hint to the humans that might read it.
I use .inl files in two cases:
For definitions of inline functions.
For...
Passing data to a closure in Laravel 4
...ide of the function, then it's not in the functions scope. Use the use keyword.
$team = Team::find($id);
Mail::send('emails.report', $data, function($m) use ($team)
{
$m->to($team->senior->email, $team->senior->first_name . ' '. $team->senior->last_name );
$m->cc($team...
Operator overloading : member function vs. non-member function?
I read that an overloaded operator declared as member function is asymmetric because it can have only one parameter and the other parameter passed automatically is the this pointer. So no standard exists to compare them. On the other hand, overloaded operator declared as a friend is symmetric...
Can I make the foreign key field optional in Django model
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Sure, just add blank=True, null=True for each field that you want to remain optional like
subject = models.ForeignKey(subjects, blank=True, null=True)
share
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Get DateTime.Now with milliseconds precision
...round 10-15 ms. See Eric Lippert's blog post about precision and accuracy for more details.
If you need more accurate timing than this, you may want to look into using an NTP client.
However, it's not clear that you really need millisecond accuracy here. If you don't care about the exact timing - ...
How to git log from all branches for the author at once?
I need to get the report of all commits that the author did. So far, I have the script that wraps the following command:
2...
How to shorten my conditional statements
... 3, 4].includes(test.type)) {
// Do something
}
If a browser you support doesn't have the Array#includes method, you can use this polyfill.
Short explanation of the ~ tilde shortcut:
Update: Since we now have the includes method, there's no point in using the ~ hack anymore. Just keepin...