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How much is the overhead of smart pointers compared to normal pointers in C++?
...e, and soon shared_ptrs become the default memory management technique. So now you have repeated 1-3% abstraction penalties which are taken over and over again.
– Nathan Doromal
Nov 27 '19 at 14:53
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How to set a value of a variable inside a template code?
...rary()
@register.assignment_tag
def get_addressee():
return "World"
Now you may use the get_addressee template tag in your templates:
{% load hello_world %}
{% get_addressee as addressee %}
<html>
<body>
<h1>hello {{addressee}}</h1>
</body>
<...
'is' versus try cast with null check
... casts seem to be performed as fast as they used to be but as and linq are now approximately 3 times faster.
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List all indexes on ElasticSearch server?
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@paweloque answer now looks like it's the correct solution; seems cleaner. curl http://localhost:9200/_stats/indexes\?pretty\=1
– notapatch
Mar 28 '14 at 12:09
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What is memoization and how can I use it in Python?
... return k * factorial(k - 1)
factorial = Memoize(factorial)
A feature known as "decorators" was added in Python 2.4 which allow you to now simply write the following to accomplish the same thing:
@Memoize
def factorial(k):
if k < 2: return 1
return k * factorial(k - 1)
The Python D...
unique object identifier in javascript
I need to do some experiment and I need to know some kind of unique identifier for objects in javascript, so I can see if they are the same. I don't want to use equality operators, I need something like the id() function in python.
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What is a “callable”?
Now that it's clear what a metaclass is , there is an associated concept that I use all the time without knowing what it really means.
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Python division
...2.7 and Python 3.3.
In Python 2.7 and Python 3.3:
>>>20//15
1
Now, see the comparison
>>>a = 7.0/4.0
>>>b = 7/4
>>>print a == b
For the above program, the output will be False in Python 2.7 and True in Python 3.3.
In Python 2.7 a = 1.75 and b = 1.
In Pyth...
Simplest two-way encryption using PHP
... guys, just FYI => MCRYPT IS DEPRECATED. capsing so everyone should know not to use it as it gave us a myriad of issues. It deprecated since PHP 7.1 if i'm not mistaken.
– clusterBuddy
Jun 3 '19 at 10:29
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How to create local notifications?
...alloc] init];
notification.fireDate = [NSDate dateWithTimeIntervalSinceNow:7];
notification.alertBody = @"This is local notification!";
notification.timeZone = [NSTimeZone defaultTimeZone];
notification.soundName = UILocalNotificationDefaultSoundName;
notification.applicationIcon...