Archive for July 2008

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Using SQL potential

How to use the database SQL to its full potential. The idea is to reduce procedural coding and thereby improve performance, reduce defects.

Ishmeet lost

The Star voice of India, Ishmeet Singh is no longer with us. He died in Maldives where he had gone to perform, and was only 18 years old. He had a great career in front of him. Its very sad, and we cannot even begin to understand what his family must be going through. I [...]

Online judge

Sometime back I came across Sphere Online Judge (SPOJ). A ‘judge’ is a mechanism through which you can verify your programming solutions. The SPOJ contains a huge range of programming problems. You need to code a solution in one of the supported languages (from Unix shell scripting to C to Java to esoteric languages like [...]

Rupee Devaluation

How do currency exchanges work?

Value of Pi

Value of Pi

Wikipedia defines Pi or p as “a mathematical constant which represents the ratio of any circle’s circumference to its diameter in Euclidean geometry”. As a kid I used to be interested in the calculation of Pi. The value of Pi, to 100 places of decimal is: 3.1415 9265 3589 7932 3846 2643 3832 7950 2884 [...]

Continuous Compounding

I feel there is something mathematically wrong with the way compound interest is defined today. We say “5% per annum, semi-annually compounded”. If I have money invested, mathematically speaking, it should get compounded all the time, not just in fixed intervals. I would like to define the term “absolute percentage” – the annual interest rate [...]