我正在尝试解析从Excel电子表格生成的CSV文件.
这是我的代码
require 'csv'
file = File.open("input_file")
csv = CSV.parse(file)
但是我得到了这个错误
ArgumentError: invalid byte sequence in UTF-8
我认为错误是因为Excel将文件编码到ISO 8859-1 (Latin-1)而不是编入UTF-8
请有人帮我解决这个问题
提前致谢.
我想在单击某个DOM元素后加载图像和其他一些操作,但我想在点击操作完成后加载它们.
这是一个代码示例:
$("#message_link").click(function(){
if (some_conditions...){
$("#header").append("<div><img alt=\"Loader\"src=\"/images/ajax-loader.gif\" /></div>");
}
});
问题是if条件在单击操作完成之前执行(或者至少这是我的印象).我需要在单击操作完成后执行If条件.有人可以告诉我一个解决方案吗？
谢谢 :)
我开发Rails应用程序特别是一个rubygem,我想从我的宝石加控制器,使其可在Rails应用程序(类似于设计确实与RegistrationsController,SessionsController).
在宝石方面:
我尝试添加以下app/controllers/samples_controller.rb
class SamplesController < ApplicationController
def index
.
.
end
end
然后在我的rails路线上添加它:
match 'route' => 'samples#index'
要么
resources :samples
显然我在那里遇到了一些问题,但我不知道它是什么？我是否需要在某处明确要求我的SampleController或应用程序上的初始化程序？
现在我在访问路线时遇到此错误
uninitialized constant SamplesController
谢谢 :)
我正在使用Rails 3.1应用程序,我正在将黄瓜集成到我的应用程序但是当我尝试运行它时,我得到了这个奇怪的错误,有人可以帮我吗？
Using the default profile...
uninitialized constant ActionController::Dispatcher (NameError)
/Users/chinog9/.rvm/gems/ruby-1.9.2-p180/gems/cucumber-rails-0.3.2/lib/cucumber/rails/action_controller.rb:51:in `rescue in <top (required)>'
/Users/chinog9/.rvm/gems/ruby-1.9.2-p180/gems/cucumber-rails-0.3.2/lib/cucumber/rails/action_controller.rb:42:in `<top (required)>'
/Users/chinog9/.rvm/gems/ruby-1.9.2-p180/gems/cucumber-rails-0.3.2/lib/cucumber/rails/world.rb:27:in `<top (required)>'
/Users/chinog9/INNKU/tacos/features/support/env.rb:11:in `<top (required)>'
/Users/chinog9/.rvm/gems/ruby-1.9.2-p180/gems/cucumber-0.10.2/lib/cucumber/rb_support/rb_language.rb:143:in `load'
/Users/chinog9/.rvm/gems/ruby-1.9.2-p180/gems/cucumber-0.10.2/lib/cucumber/rb_support/rb_language.rb:143:in `load_code_file'
/Users/chinog9/.rvm/gems/ruby-1.9.2-p180/gems/cucumber-0.10.2/lib/cucumber/runtime/support_code.rb:176:in `load_file'
/Users/chinog9/.rvm/gems/ruby-1.9.2-p180/gems/cucumber-0.10.2/lib/cucumber/runtime/support_code.rb:78:in `block in load_files!'
/Users/chinog9/.rvm/gems/ruby-1.9.2-p180/gems/cucumber-0.10.2/lib/cucumber/runtime/support_code.rb:77:in `each'
/Users/chinog9/.rvm/gems/ruby-1.9.2-p180/gems/cucumber-0.10.2/lib/cucumber/runtime/support_code.rb:77:in `load_files!'
/Users/chinog9/.rvm/gems/ruby-1.9.2-p180/gems/cucumber-0.10.2/lib/cucumber/runtime.rb:137:in `load_step_definitions'
/Users/chinog9/.rvm/gems/ruby-1.9.2-p180/gems/cucumber-0.10.2/lib/cucumber/runtime.rb:39:in `run!'
/Users/chinog9/.rvm/gems/ruby-1.9.2-p180/gems/cucumber-0.10.2/lib/cucumber/cli/main.rb:43:in `execute!'
/Users/chinog9/.rvm/gems/ruby-1.9.2-p180/gems/cucumber-0.10.2/lib/cucumber/cli/main.rb:20:in `execute'
/Users/chinog9/.rvm/gems/ruby-1.9.2-p180/gems/cucumber-0.10.2/bin/cucumber:14:in `<top (required)>'
/Users/chinog9/.rvm/gems/ruby-1.9.2-p180/bin/cucumber:19:in `load'
/Users/chinog9/.rvm/gems/ruby-1.9.2-p180/bin/cucumber:19:in `<main>'
这是我的env.rb:
ENV["RAILS_ENV"] ||= "test"
require File.expand_path(File.dirname(__FILE__) + '/../../config/environment')
require 'cucumber/formatter/unicode' # Remove this line if you don't want Cucumber Unicode support
require 'cucumber/rails/world'
require 'cucumber/rails/active_record'
require 'cucumber/web/tableish' …你好我一直试图找到如何在eclipse中运行Java Play项目,但我找不到一个简单的方法.这就是我所做的
创建一个项目
play new testApp
转到该文件夹
cd testApp
使项目黯然失色
play eclipsify
打开eclipse并导入为现有项目,但后来我不知道如何从eclipse运行服务器
注意:我知道我也可以在控制台中运行它.问题是我使用Eclipse在构建路径中添加了一个Eclispe项目,所以如果我在控制台中运行它,我认为它不起作用,或者我错了？
我正在尝试连接到RubyGems API,但是当我尝试获取JSON时,我得到了一个stange错误.
Uncaught SyntaxError: Unexpected token :
我在其他问题和帖子中看到过这个错误,但没有一个对我有用.
这是我的$ .getJSON()函数
.getJSON("http://rubygems.org/api/v1/gems/rails.json?jsoncallback=?", function(data) {
...function stuff....
});
这是我应该收到的JSON:
{"dependencies":{"runtime":[{"name":"actionmailer","requirements":"= 3.0.9"},{"name":"actionpack","requirements":"= 3.0.9"},{"name":"activerecord","requirements":"= 3.0.9"},{"name":"activeresource","requirements":"= 3.0.9"},{"name":"activesupport","requirements":"= 3.0.9"},{"name":"bundler","requirements":"~> 1.0"},{"name":"railties","requirements":"= 3.0.9"}],"development":[]},"name":"rails","downloads":4474748,"info":"Ruby on Rails is a full-stack web framework optimized for programmer happiness and sustainable productivity. It encourages beautiful code by favoring convention over configuration.","version_downloads":93309,"version":"3.0.9","homepage_uri":"http://www.rubyonrails.org","bug_tracker_uri":"http://rails.lighthouseapp.com/projects/8994-ruby-on-rails","source_code_uri":"http://github.com/rails/rails","gem_uri":"http://rubygems.org/gems/rails-3.0.9.gem","project_uri":"http://rubygems.org/gems/rails","authors":"David Heinemeier Hansson","mailing_list_uri":"http://groups.google.com/group/rubyonrails-talk","documentation_uri":"http://api.rubyonrails.org","wiki_uri":"http://wiki.rubyonrails.org"}
有人可以帮帮我吗 :)
我是hibernate的新手,我试图使用以下代码更新映射对象,但它不会更新
factory = config.buildSessionFactory();
session = factory.getCurrentSession();
Transaction t = session.beginTransaction();
String hql = "UPDATE "+tableName+" SET "+columnName+" = '"+columnValue+"' WHERE id ="+id+";";
Query query=session.createSQLQuery(hql);
t.commit();
我错过了什么吗？它不会崩溃也不会更新记录.
注意:我正在使用Hibernate3和Mysql