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Programming Ruby scripts

Arrayterator

This class creates a buffered iterator for reading big arrays in small contiguous blocks. The class is useful for objects stored in the filesystem. It allows iteration over the object without reading everything in memory; instead, small blocks are read and iterated over. The class can be used with any object ...
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

Format number function

For many languages it is possible to use the locale module to format numbers. But there are at least three languages for which the locale.localeconv()['thousands_sep'] is empty: brazilian portuguese - 'pt_br', portuguese - 'pt' and spanish - 'es'. The first function, format_positive_integer() will return the passed integer number as a string ...
Python

New Tail Recursion Decorator

This tail recursion decorator can eliminate the tail calls for recursive functions. ...
Python

Lazy Traversal of Directed Graphs

The os.path.walk routine that ships with the python standard library is limited to traversing the file system tree. This script allows you to realize a generic traversal for arbitrary (directed) graphs with support for recursion limits. ...
Python

Weighted choice

This script uses fact that any probability distributions can be sampled by computing the cumulative distribution, drawing a random number from 0 to 1, and finding the x-value where that number is attained on the cumulative distribution. The searchsorted(..) function performs this search. This script return random samples of cumulative vector ...
Python

Group and partition

This script enables the group_by functionality like the similar function existing in Ruby on Rails. ...
Python

Python Octree Implementation

This script is a simple implementation of an octree data structure in python. Its use is primarily for fast collision or view frustrum culling in interactive 3d environments, but its possible uses are quite open-ended. It was originally written for use with the pyOgre 3d engine binding. The code makes use of ...
Python

A general solution of Eight Queens

This script is a general method to figuren out all solutions of eight queens. Certainly, it can also solve any number of queens. Each solution is a list, and each value of the list represents the column number, at the same time the index of this value represents it's row number. For instance, ...
Python

Computing permutations with duplicates

This script handles duplicate values in a list. It could easily be made a generator, and it does not require recursion. ...
Python

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