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Simple way to encode a string according to a password?
...e third party libraries. I'd recommend something like the Vigenere cipher. It is one of the strongest of the simple ancient ciphers.
Vigenère cipher
It's quick and easy to implement. Something like:
import base64
def encode(key, string):
encoded_chars = []
for i in xrange(len(string)):
...
How to check null objects in jQuery
...Query and I want to check the existence of an element in my page. I have written following code, but it's not working:
13 A...
How efficient is locking an unlocked mutex? What is the cost of a mutex?
...n a low level language (C, C++ or whatever): I have the choice in between either having a bunch of mutexes (like what pthread gives me or whatever the native system library provides) or a single one for an object.
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Entity Framework: One Database, Multiple DbContexts. Is this a bad idea? [closed]
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You can have multiple contexts for single database. It can be useful for example if your database contains multiple database schemas and you want to handle each of them as separate self contained area.
The problem is when you want to use code first to create your database - ...
How to perform Callbacks in Objective-C
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Normally, callbacks in objective C are done with delegates. Here's an example of a custom delegate implementation;
Header File:
@interface MyClass : NSObject {
id delegate;
}
- (void)setDelegate:(id)delegate;
- (void)doSomething;
@end
@interface NSObject(MyDele...
What does the exclamation mark mean in a Haskell declaration?
I came across the following definition as I try to learn Haskell using a real project to drive it. I don't understand what the exclamation mark in front of each argument means and my books didn't seem to mention it.
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What are valid values for the id attribute in HTML?
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For HTML 4, the answer is technically:
ID and NAME tokens must begin with a letter ([A-Za-z]) and may be followed by any number of letters, digits ([0-9]), hyphens ("-"), underscores ("_"), colons (":"), and periods (".").
HTML 5 is even more permissive, saying only that an id must contain at...
Setting a property by reflection with a string value
I'd like to set a property of an object through Reflection, with a value of type string .
So, for instance, suppose I have a Ship class, with a property of Latitude , which is a double .
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How do I run msbuild from the command line using Windows SDK 7.1?
...r
On the next dialog box click Environment variables
Scroll down to PATH
Edit it to include your path to the framework (don't forget a ";" after the last entry in here).
For reference, my path was C:\Windows\Microsoft.NET\Framework\v4.0.30319
Path Updates:
As of MSBuild 12 (2013)/VS 2013/.NET 4.5.1...
Find the most common element in a list
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With so many solutions proposed, I'm amazed nobody's proposed what I'd consider an obvious one (for non-hashable but comparable elements) -- [itertools.groupby][1]. itertools offers fast, reusable functionality, and lets you ...