googya

Rails 開發注意要點

About Ruby Syntax

• 編輯器設定 soft tab (space=2)，以 2 格空白符號做為程式內縮距離（不分語言）。
• 函式如果只有一個參數，就不強制打()
• 函式如果有二個以上的參數，通通都要有 ()
  • (避免發生奇怪的paser bug跟保持專案一致性)
• 字串限定用雙引號包覆
• 善用 "#{str1} #{str3} " 等字串改寫技巧取代不需要的字串加法。

googya

class ThreeException extends Exception{}

public class FinallyWorks {

    static int count =0;

    public static void main(String[] args) {
        while(true){                    //如果把try放到循环里，就建立了一个”程序继续执行之前必须要达到“的条件，同时也可以加入一个静态计数器，使之能尝试一定的次数

           try{

googya

package hoodoo.SimpleException;

/**
 * Created by IntelliJ IDEA.
 * User: Hoodoo
 * Date: 11-4-9
 * Time: 上午11:35
 * To change this template use File | Settings | File Templates.
 */
import static  java.lang.System.*;

googya

package hoodoo.reflection.proxy;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;


/**
 * Created by IntelliJ IDEA.
 * User: Hoodoo

googya

package timer;

import java.io.IOException;
import java.util.Timer;
import java.util.TimerTask;

/**
 * Created by IntelliJ IDEA.
 * User: Hoodoo
 * Date: 11-4-26

googya

# coding: utf-8
require 'rubygems'
require 'nokogiri'
require 'open-uri'

uris = File.open("c:\\url1.txt",'r')

#ratings = File.open("ratings.txt",'w')
i=0

googya

test_dir = Dir.open("expert ratings")

test_dir.entries[2..-1].each do |f|


    begin
    file = File.open("E:\\ratings_all\\expert ratings\\"+f.to_s)
    rescue Errno::ENOENT=> error
        next
    end

googya

test_dir = Dir.open("expert ratings")

test_dir.entries[2..-1].each do |f|


    begin
    file = File.open("E:\\ratings_all\\expert ratings\\"+f.to_s)
    rescue Errno::ENOENT=> error
        next
    end

googya

 class Kitty
   class << self
     puts "#{self.inspect} -- #{self.object_id}"  #a点

     def hello
       puts "#{self.inspect} -- #{self.object_id}"  #b点
       puts "#{Kitty.inspect} -- #{Kitty.object_id}"  #c点
     end
   end

googya

public class App {     public App(String name) { System.out.println(name + "'s constructor called"); }      static { System.out.println("static initializer called"); }      { System.out.println("instance initializer called"); }      static { System.out.println("static initializer2 called"); }      { System.out.println("instance initializer2 called"); }      public static void main( String[] args ) {         new App("one");         new App("two");   } }