Algorithms

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Algorithm of the Week: Binary Search Tree

Introduction Constructing a linked list is a fairly simple task. Linked lists are a linear structure and the items are located one after another, each...

0 replies - 7704 views - 06/25/12 by Stoimen Popov in Articles

Algorithm of the Week: Closest Pairs

As I mentioned in a post a couple of days ago I’ve been writing the closest pairs algorithm in Haskell and while the brute force version works for small...

0 replies - 4850 views - 06/19/12 by Mark Needham in Articles

Algorithm of the Week: Linked List

Introduction The linked list is a data structure in which the items are ordered in a linear way. Although modern programming languages support very...

6 replies - 6166 views - 06/14/12 by Stoimen Popov in Articles

Algorithm of the Week: Stack and Queue

Introduction Every developer knows that computer algorithms are tightly related to data structures. Indeed many of the algorithms depend on a data...

2 replies - 7220 views - 06/08/12 by Stoimen Popov in Articles

2-legged OAuth with OAuth 1.0 and 2.0

OAuth 1.0 emerged from the large social providers like Facebook, Yahoo!, AOL, and Google. Each had developed its own alternative to the password...

1 replies - 4386 views - 05/19/12 by Prabath Siriwardena in Articles

Algorithm of the Week: Determine if a Number is Prime

Each natural number that is divisible only by 1 and itself is prime. Prime numbers appear to be more interesting to humans than other numbers. Why is that...

1 replies - 7984 views - 05/09/12 by Stoimen Popov in Articles

Ask DZ: How do you compare two text classfiers?

I need to compare two text classifiers – one human, one machine. They are assigning multiple tags from an ontology. We have an initial corpus of ~700...

0 replies - 2930 views - 05/06/12 by Tony Russell-rose in Articles

Algorithm of the Week: How to Determine the Day of the Week

Do you know what day of the week was the day you were born? Monday or maybe Saturday? Well, perhaps you know that. Everybody knows the day he’s born on,...

3 replies - 9625 views - 04/24/12 by Stoimen Popov in Articles

Algorithm of the Week: Boyer-Moore String Searching

Have you ever asked yourself which algorithm is used to find a word after clicking Ctrl+F and typing something? Well I guess you know the answer from the...

0 replies - 11481 views - 04/17/12 by Stoimen Popov in Articles

Algorithm of the Week: Morris-Pratt String Searching

We saw that neither brute force string searching nor Rabin-Karp string searching are effective. However in order to improve some algorithm, first we need...

0 replies - 12303 views - 04/11/12 by Stoimen Popov in Articles

Algorithm of the Week: Rabin-Karp String Searching

Brute force string matching is a very basic sub-string matching algorithm, but it’s good for some reasons. For example it doesn’t require preprocessing...

1 replies - 9659 views - 04/03/12 by Stoimen Popov in Articles

Algorithm of the Week: Brute Force String Matching

String matching is something crucial for database development and text processing software. Fortunately, every modern programming language and library is...

0 replies - 8545 views - 03/27/12 by Stoimen Popov in Articles

My Implementation of the Apriori Algorithm

This is a self imposed machine problem I wrote over a frantic afternoon for my lesson on Frequent Itemsets and the Apriori Algorithm. I wanted to write a...

0 replies - 4381 views - 03/25/12 by Jose Asuncion in Articles

Algorithm Cheatsheet: Radix Sort

Radix sort is an elegant and fast integer-sorting algorithm as explained in the following cheatsheet. Please click on the image bellow to download the...

1 replies - 5876 views - 03/21/12 by Stoimen Popov in Articles

Algorithm of the Week: Radix Sort

Algorithms always depend on the input. We saw that general purpose sorting algorithms like insertion sort, bubble sort and quicksort can be very efficient in...

1 replies - 7950 views - 03/20/12 by Stoimen Popov in Articles