Anything

This blog describes anything about @mrkn's thoughts, which includes computer programming (mostly Ruby, Haskell, and C++), mathematics, physics, and so on. Each article is written in English for learning it.

2011-08-23

Instantiation a literal of decimal fraction without its exponent part as a Rational

In Ruby, a literal of decimal fraction is instantiated as a Float. I make a patch to modify it so that a literal of decimal fraction witho...

2011-04-14

My original color scheme for vim "mrkn256.vim" is available on github

I have my original color scheme for vim, called "mrkn256.vim". It has been available on a page in vim.org . Today, I have create...

2010-09-06

We can get faster fib just returning two values

How do you make fib fast? I don't recomend using memoization because it require waste memory. I recommend returning two values.

RSpec and Cucumber

I'm reading The RSpec Book. I've understand: RSpec should be used to describe the behavior of objects. For describing the behav...

2010-08-14

Free online textbooks for computer arithmetic

I'm the maintainer of the bigdecimal library of CRuby . Recently, I'm studying computer arithmetic so improving the performance of ...

2009-12-18

To use preprocessor macros on gdb

When debugging ruby on gdb, we often want to expand some preprocessor macros, such as RSTRING_LEN , RARRAY_PTR . To make preprocessor macros...

2009-12-17

First commit

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mrkn

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