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What is the most efficient string concatenation method in python?
...and.
Finally, the golden rule of optimization: don't optimize unless you know you need to, and measure rather than guessing.
You can measure different methods using the timeit module. That can tell you which is fastest, instead of random strangers on the internet making guesses.
...
Using node.js as a simple web server
...
Simplest Node.js server is just:
$ npm install http-server -g
Now you can run a server via the following commands:
$ cd MyApp
$ http-server
If you're using NPM 5.2.0 or newer, you can use http-server without installing it with npx. This isn't recommended for use in production but ...
Git - How to use .netrc file on Windows to save user and password
...assword in plain text as shown below.
With Git 1.8.3 (April 2013):
You now can use an encrypted .netrc (with gpg).
On Windows: %HOME%/_netrc (_, not '.')
A new read-only credential helper (in contrib/) to interact with the .netrc/.authinfo files has been added.
That script would allow you ...
Copy constructor for a class with unique_ptr
...situations, the deleter will be type erased somehow, or pointless (if you know the type to delete, why change only the deleter?). In any case, yes, this is the design of a value_ptr -- unique_ptr plus deleter/copier information.
– Yakk - Adam Nevraumont
Jul 28...
How to intercept click on link in UITextView?
...URL:url];
}
@end
You will need to implement openURL: in your delegate.
Now, to have the application start with your new subclass of UIApplication, locate the file main.m in your project. In this small file that bootstraps your app, there is usually this line:
int retVal = UIApplicationMain(argc...
Automatic post-registration user authentication
...ion')->set('_security_main', serialize($token));
// The user is now logged in, you can redirect or do whatever.
}
}
Symfony 2.6.x - Symfony 3.0.x
As of symfony 2.6 security.context is deprecated in favor of security.token_storage. The controller can now simply be:
use Symfony\Com...
Why do we need virtual functions in C++?
...eneric food, cats eat rats, all without virtual.
Let's change it a little now so that eat() is called via an intermediate function (a trivial function just for this example):
// This can go at the top of the main.cpp file
void func(Animal *xyz) { xyz->eat(); }
Now our main function is:
Anima...
performSelector may cause a leak because its selector is unknown
...e (the (void *) on the right hand side simply tells the compiler that you know what you're doing and not to generate a warning since the pointer types don't match).
Finally, you call the function pointer2.
Complex Example
When the selector takes arguments or returns a value, you'll have to change...
Preferred way to create a Scala list
...odify it, use a tail recursive method, and probably others that I don't know about.
10 Answers
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Iterating through a JSON object
...nt:
from __future__ import print_function
for song in json_object:
# now song is a dictionary
for attribute, value in song.items():
print(attribute, value) # example usage
NB: You could use song.iteritems instead of song.items if in Python 2.
...