navyblueshellingford

欄

2008-07-18T23:07:00.005+08:00

多愁善感淌一點點青春歲月落一片片彷彿存在母體操縱的世界深深地難以自拔於沒有方向的原點燈火玲瓏處憑欄人獨倚何是回首時 for A.L.

天守閣之徘

2008-07-14T10:46:00.011+08:00

當王牌已然從天而降剩下的也只剩下祈求上蒼天守閣的銅牆鐵壁阿且看我是否是那德川家康夜月,燈火,今夜亦瘋狂 ---謹致 A.L.(J)

restful 與 form_for

2008-07-12T22:06:00.004+08:00

不可以在 /news/new 的 view 裡面寫 form_for @news ~"~

operate existed tables in rails

2008-06-03T13:01:00.004+08:00

Just need specify table name and primary key in Model. All attribution in tables will appear automatically. class ModelName < ActiveRecord::Base self.table_name = "table_name" self.primary_key = "primary_key" end

tree implement in ruby

2008-05-24T16:28:00.006+08:00

Just for fun, but it work well. 01 #!/usr/bin/env ruby 02 # 03 # 04 05 06 def tree(dirname, indent = " |") 07 puts dirname + "/" if indent == " |" 08 dir = Dir.open dirname 09 for f in dir 10 if f == "." || f == ".." 11 next 12 elsif File.directory? dirname+"/"+f 13 puts indent + "-" + f + "/" 14 tree( dirname+"/

closure tip

2008-05-23T15:29:00.008+08:00

closure is so fun. well design for meta programming. note 1: 01 #!/usr/bin/env ruby 02 03 class Hash 04 def find_all 05 temp_hash = {} 06 each {|key,value| temp_hash[key] = value if yield(key,value) } 07 temp_hash 08 end 09 end 10 11 square = { 0 => 0, 1 => 1, 2 => 4, 3 => 9 } 12 13 new = square.find_all { |key,value| key > 1 } 14 puts

Mac OS X Terminal tip

2008-05-20T23:14:00.006+08:00

leopard terminal use xterm-color as default, but conflict with linux when ssh. The backspace act as delete(kill word at right not left). Mac OS hint provide a good solution, Copy /usr/share/terminfo/78/xterm-color on mac to ~/.terminfo/x/ on linux box. Not affect linux default setting. It saves my emacs in screen environment :D

sample scheme

2008-05-17T00:56:00.006+08:00

hello, world! here #!/usr/bin/guile -s !# (write "hello, world!") define function (define square (lambda (n) (* n n) ) ) (write (square 3) ) ; output 9 link1: The Scheme Programming Language 3/e link2: Scheme Tutorial

shelling.idv.tw

2008-05-13T23:57:00.000+08:00

買了 shelling.idv.tw，不過什麼都還沒配置 :D

self.pm

2008-05-12T22:08:00.005+08:00

some convenient usage I prefer. :p package PackageName; use self; use strict; my @args; sub new { @args = args; for (@args) { blah~! } bless {}, self; } 1; self.pm++

some vim

2008-05-12T21:57:00.000+08:00

something is fun from learning the vi editor 6/e: dwelp change two words xp change two alphabets

內灣出遊微記

2008-05-04T18:50:00.003+08:00

昨日帶友人繞過大半個新竹，一直以來都不喜新竹風物，常感食衣住行皆不盡人意，即便與大學同學出遊也甚感無聊，但昨日與友人暢遊內灣，吃盡美食，甚感愉快。看來在一個地方生活是否能讓人滿意，最重要的仍然是人。

learning perl review ch2

2008-04-26T10:59:00.006+08:00

scalar: 1.233, 2E-3, 3e45 # exponential float 123_123_234 # integer with underscore 0377, 0xff, 0b1111 # octal => 0, hexadecimal => 0x, binary => 0b "hello,"."world!" # concatenate with . "hello" x 3 # repeat 3 time with x "20fred" * 3 # ignore string when transform $str = $str . "blah"; === $str .= "blah"; $int =

boring comparison

2008-04-25T20:29:00.005+08:00

show complex data structure in perl and ruby perl #!/usr/bin/env perl use warnings; use Data::Dumper; $a = ["a", "b", "c", { "key" => "value" } ]; print Dumper $a; ruby #!/usr/bin/env ruby a = ["a", "b", "c", { "key" => "value" } ] puts a.inspect

has_many() function note

2008-04-19T19:04:00.003+08:00

if has_many :order order.delete_all just set foreign key null order.destroy_all clear all sub record

apache2 and mongrel cluster on debian

2008-04-18T18:08:00.005+08:00

Enable apache2 proxy $ sudo a2enmod proxy proxy_http proxy_balancer Configure Proxy in a virtual host /etc/apache2/site-enabled/default add DocumentRoot "RailsApp/public" # even only RailsApp also work ProxyPass / balancer://localhost/ ProxyPassReverse / balancer://localhost/ < proxy balancer://localhost/ > BalanceMember http://localhost:3000 BalanceMember http://localhost:3001

rss feed in rails

2008-04-17T13:52:00.010+08:00

Note for the Way to create Atom and RSS 2.0 feed. $ ./script/generate controller feed Suppose that the model we want show in feed is Post class FeedController < ApplicationController def rss @rss = @@post end def atom @atom = @@post end private @@post = Post.find :all, :order => "update_at", :limit => 10 end Then write the view. app/view/feed/

rails helper block

2008-04-15T23:25:00.006+08:00

Write for memo. To set a helper in the form <% helper_name do %>

blah

<% end %>. The definition is def helper_name(&block) content = capture(&block) concat("what we want write before block".block.binding) concat(content,block.binding) concat("what we want write after block",block.binding) end By the way, partial is the way do the same thing once. if the outer

spakit

2008-04-13T21:11:00.008+08:00

The rails plugin spakit means Single Page Application KIT. It can transform rails app into single page app but not modify app structure in large scale by loading content of other controller into primary controller. The installation step is from handlino.com $ sudo gem install spakit $ cd railsapp/vendor/plugins/ $ gem unpack spakit $ mv spakit-version spakit now installation finished. Before

annotate models

2008-04-13T10:37:00.002+08:00

The plugin used for adding column annotate into model file is introduced in Ralls Bible. Write for note. the newer introduction at http://pragdave.pragprog.com/pragdave/2006/02/annotate_models.html. Just two step to use it. 1.script/plugin install http://repo.pragprog.com/svn/Public/plugins/annotate_models 2. rake annotate_models And all model now with column annotate at file head.

.bashrc and screen on leopard

2008-04-05T20:06:00.002+08:00

Leopard does not put .bashrc in user home directory as default. It is not convenient when using screen because screen only load ~/.bashrc but not /etc/bashrc. So copy the latter as my .bashrc.

debian package hyperlink

2008-04-05T11:18:00.003+08:00

If writing package_name in html, On click the hyperlink, debian will install it.

openid resource

2008-04-05T00:20:00.004+08:00

Report by solidot.org: openid resource. Noticeable point is blogger.com is one of the openid provider. It is a little surprising to me.

the rain

2008-03-31T17:03:00.003+08:00

in my heart, in my heart... the hope on the cloud, on the cloud... the dream far away, far away... the tomorrow sing the same, sing the same...

.sqliterc

2008-03-25T23:29:00.003+08:00

I never notice that sqlite3 also support rc file. Write all convenient setting you like as ".header on"...etc in it. and never set it again when using sqlite3.