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Functional Programming scripts

More accurate sum

Built-in "sum" function, as well as add.reduce functions in Numeric/numarray introduce a large error when summing large arrays of like elements. This script contains a function that makes sums with error less than 1e-15. It doesn't use any additional memory (although it destroys the data array), and also runs asymptotically faster for unlimited precision ...
Python

Metaclass Class Policies

This code implements the policy design pattern in Python by using metaclasses and multiple inheritance. ...
Python

Length limited O 1 LRU Cache implementation

Length-limited O(1) LRU Cache implementation script is an implementation of a length-limited O(1ion scripue. ...
Python

A queue for string data

This script is a queue data structure, for string data only, which looks like a File object. This class takes care of the list.append and .join mess, which is needed for fast string concatenation. ...
Python

CookieInfo

The "CookieInfo" and "Cookie" classes provide developers with an read-only interface to the "cookies.txt" that most browsers store. The CookieInfo class makes Cookie objects from the cookie file. It also provides methods to operate on the whole set of Cookies. The Cookie object provides methods to convert a cookie into both ...
Python

Automatic indentation of output

This script is an output stream wrapper; possibly useful for debugging code with print statements. When write() is called, it makes a note of the calling frame. The indentation level is equal to the number of frames in the call stack which have been previously noted. ...
Python

Memento Closure

The memento pattern is great for transaction-like processing. This script adds transactional semantics to methods. Methods decorated with @transactional will rollback to entry state upon exceptions. ...
Python

Encoding A String

The main purpose of these functions are to allow encoding a string from base 256 to a special base 255. The function view the strings as numbers and simply change what base they are written in. This is not recommended for very long strings; otherwise, the encoding and decoding process can ...
Python

Debuging of object instantiation

If you are debugging a program, this script will help you to know if some special objects exist and where they came from. ...
Python

Find the most frequent elements

This script returns a sorted list of the most common to least common elements and their counts. If n is specified, return only the n most common elements. ...
Python

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