Workshops in Amagasaki, Japan by Me
Blogged by Ujihisa. Standard methods of programming and thoughts including Clojure, Vim, LLVM, Haskell, Ruby and Mathematics written by a Japanese programmer. github/ujihisa I organized the 7th Vim workshop and a CoffeeScript workshop in Amagasaki, Japan on the last Saturday. About 20 to 30 people attended the workshops. Even though the room had an air conditioner, the room was so hot and humid li
Standards: Investing The Methods Of An Object On Unite
How often do you use Object#methods? That's convenient particularly on IRB. This is also available on Unite.vim. Write the following code on your ~/.vimrc let s:unite_source = { \ 'name': 'evalruby', \ 'is_volatile': 1, \ 'required_pattern_length': 1, \ 'max_candidates': 30, \ } function! s:unite_source.gather_candidates(args, context) if a:context.input[-1:] == '.' let methods = split( \ unite#ut
Conditional Operator Associativities
Blogged by Ujihisa. Standard methods of programming and thoughts including Clojure, Vim, LLVM, Haskell, Ruby and Mathematics written by a Japanese programmer. github/ujihisa In Ruby: a = true ? :a : true ? :b : :c p a Guess the answer! Yes, as you thought, the answer is :a. In JavaScript: var a = true ? 'a' : true ? 'b' : 'c'; alert(a); Guess the answer! Yes, as you thought, the answer is a. In Vi
Combining Java, Clojure and JRuby
Blogged by Ujihisa. Standard methods of programming and thoughts including Clojure, Vim, LLVM, Haskell, Ruby and Mathematics written by a Japanese programmer. github/ujihisa JRuby can access classes implemented in pure Java code. Clojure can generate a class file. Therefore it's straightforward for JRuby to access classes implemented in Clojure. First I define a class with a method in plain Java.
An Experimental Twitter Clone with Rails
Blogged by Ujihisa. Standard methods of programming and thoughts including Clojure, Vim, LLVM, Haskell, Ruby and Mathematics written by a Japanese programmer. github/ujihisa Let's make an experimental Twitter clone web app by Ruby on Rails version 3. The minimum features of Twitter clone app are below: A visitor can sign up and get an account to become a user A user can post tweets A visitor and a
Several Ways of Defining Class/Instance Methods
This entry is for Ruby beginners. Class Methods Assume you have class A and want to define a class method c. class + def + self. There are so many ways... In Ruby 1.9: A.define_singleton_method :i do 'hi' end A.singleton_class.class_eval do def i 'hi' end end A.singleton_class.instance_eval do define_method :i do 'hi' end end ReplyDelete
Public Methods of Kernel on Ruby 1.9 and 1.8
Blogged by Ujihisa. Standard methods of programming and thoughts including Clojure, Vim, LLVM, Haskell, Ruby and Mathematics written by a Japanese programmer. github/ujihisa The stable version of MRI 1.9.2 will be released soon. Let's compare the differences between the latest ruby and the legacy ruby. Here this is the diff of the public methods of Kernel class on ruby 1.9.2dev and 1.8.7. I just u
How to Get Each Characters
Blogged by Ujihisa. Standard methods of programming and thoughts including Clojure, Vim, LLVM, Haskell, Ruby and Mathematics written by a Japanese programmer. github/ujihisa STDIN.getc returns a buffered character from STDIN. How do I get a character from STDIN immediately without buffering? This code looks well, but it doesn't work as you expect. The input characters will be still buffered. STDIN
Spawn On JRuby
Blogged by Ujihisa. Standard methods of programming and thoughts including Clojure, Vim, LLVM, Haskell, Ruby and Mathematics written by a Japanese programmer. github/ujihisa As the previous posts of this blog, ruby 1.9's Kernel.spawn is very useful. I ported it to ruby 1.8 partly. How about on JRuby? Currently there are two ways of using spawn on JRuby, but both of them have problem. fork + exec +
All About Spawn
Blogged by Ujihisa. Standard methods of programming and thoughts including Clojure, Vim, LLVM, Haskell, Ruby and Mathematics written by a Japanese programmer. github/ujihisa Spawn = Fork + Exec, but works also on platforms which don't support fork. The usage of spawn is often said to be cryptic. Here I'll describe common cases. system('ls') pid = spawn(['ls', 'ls']) Process.wait(pid) system('ls .'
Multi Process Programming With DRb
Blogged by Ujihisa. Standard methods of programming and thoughts including Clojure, Vim, LLVM, Haskell, Ruby and Mathematics written by a Japanese programmer. github/ujihisa Usually Ruby's thread works well, but when you have to use thread-unsafe features like Dir.chdir, you need to use fork. How can you wait for the children processes certainly finish the given tasks? The answer is to use DRb. I'
LLVM For Starters
Blogged by Ujihisa. Standard methods of programming and thoughts including Clojure, Vim, LLVM, Haskell, Ruby and Mathematics written by a Japanese programmer. github/ujihisa Installation of LLVM Compiler and Runtime See the previous post. Overview of LLVM To write a helloworld application, you can choose a path where to start. The typical path is, Write a code in LLVM Assembly Language (.ll) $ vim
BFC: Brainf\*\*k Compilers
Blogged by Ujihisa. Standard methods of programming and thoughts including Clojure, Vim, LLVM, Haskell, Ruby and Mathematics written by a Japanese programmer. github/ujihisa Today I released BFC 1.0! BFC: Brainf**k Compilers http://github.com/ujihisa/bfc bfc.rb is a compiler written in Ruby, which can compile BF code to Ruby, C, Haskell, Scheme and LLVM. USAGE OF BFC $ ./bfc.rb --help $ ./bfc.rb [
Termtter Installs New Gem Libraries Automatically
Blogged by Ujihisa. Standard methods of programming and thoughts including Clojure, Vim, LLVM, Haskell, Ruby and Mathematics written by a Japanese programmer. github/ujihisa I wrote a new termtter plugin. http://github.com/jugyo/termtter/blob/dbbd3d1b16933a205470125982f03a3444de3d07/lib/plugins/gem_install.rb Once you use this plugin by plug gem_install, your termtter will install arbitrary gem li
How To Skim Long Sentences Quickly
Blogged by Ujihisa. Standard methods of programming and thoughts including Clojure, Vim, LLVM, Haskell, Ruby and Mathematics written by a Japanese programmer. github/ujihisa How can non-English speaking people skim long sentences quickly? Today I saw the light with the hack: One way to increase your comprehension is to ignore all the extra words in a sentence -- trim the fat. -- Cracking the TOEFL
I Will Speak At RubyConf 2009
Blogged by Ujihisa. Standard methods of programming and thoughts including Clojure, Vim, LLVM, Haskell, Ruby and Mathematics written by a Japanese programmer. github/ujihisa http://rubyconf.org/ I got an email from Ruby Central this morning. Thank you for submitting a proposal to speak at RubyConf 2009. We're happy to let you know that your proposal, "Hacking parse.y", has been selected for inclus
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