我下面这篇文章中,我可以在下面和主页这个ruby文件这样写的代码确实有示例应用程序,但它仍然说静态页面的主页应该有内容"示例应用程序"当我运行 bundle exec rspec spec/requests/static_pages_spec.rb
spec/requests/static_pages_spec文件代码:
require 'spec_helper'
describe "Static pages" do
describe "Home page" do
it "should have the content 'Sample App'" do
visit '/static_pages/home'
page.should have_content('Sample App')
end
end
end
home.html.erb
<h1>Sample App</h1>
<p>
This is the home page for the
<a href="http://railstutorial.org/">Ruby on Rails Tutorial</a>
sample application.
</p>
下面是我的这个应用程序的宝石文件.请指教.谢谢你的帮助.
source 'https://rubygems.org'
gem 'rails', '3.2.1'
gem 'sqlite3'
# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'
group :development do
gem 'rspec-rails', '2.6.0'
end
group :test do …学生组表:
STDNT_GROUP
studentId,CollegeID,studentgroup,flag
1,007,panthers,y
2,003,owls,n
3,007,owls,y
1,007,texans,y
2,003,texans,n
预期产出
1,007
2,003
3,007
我想要独特的学生ID以及他们各自的大学生.
我试过这个查询:
select distinct(studentId),collegeID from;
和
select studentId,collegeID from STDNT_GROUP where studentId in(select distinct(studentId) from STDNT_GROUP)";
我需要执行许多操作，由传递字符串启动，操作过程取决于字符串是文件、文件夹还是 web url。
仅供参考 - 对于文件，我将文件复制到存储库，对于文件夹，我正在制作快捷方式 .lnk 并将其复制到存储库，对于 web url，我正在制作快捷方式 .url 并将其复制到存储库。
我开发了一个解决方案，但它不够健壮；我偶尔会因错误识别字符串而出现错误。我使用的方法是计算字符串中的点数，并应用规则：
If Dots = 1 Then... it's a file.
If Dots < 1 Then... it's a folder.
If Dots > 1 Then... it's a website.
然后我使用我在网上找到的几个函数改进了它：
Dots = Len(TargetPath) - Len(Replace(TargetPath, ".", "")) ' Crude check for IsURL (by counting Dots)
If CheckFileExists(TargetPath) = True Then Dots = 1 ' Better check for IsFile
If CheckFolderExists(TargetPath) = True Then Dots = 0 ' Better check for IsFolder
问题是，我仍然遇到两种情况的问题： …
我正在使用代码进行加密和加密。它没有给出字符串结果。字节数组未转换为字符串。我几乎尝试了所有将字节数组转换为char的方法，但未给出结果。
public class EncryptionTest extends Activity {
EditText input, output, outputDecrypt;
String plain_text;
byte[] key, encrypted_bytes,keyStart,byte_char_text,decrpyted_bytes ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_encryption_test);
input = (EditText) findViewById(R.id.text_inputText);
output = (EditText) findViewById(R.id.text_Result);
outputDecrypt = (EditText) findViewById(R.id.text_decrypt_Result);
Button encrypt_btn = (Button) findViewById(R.id.btn_encrpyt);
Button decrypt_btn = (Button) findViewById(R.id.btn_Decrypt);
plain_text = input.getText().toString();
keyStart = "Supriyo".getBytes();
byte_char_text = plain_text.getBytes();
encrypt_btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
try {
KeyGenerator keygen = KeyGenerator.getInstance("AES");
SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
sr.setSeed(keyStart);
keygen.init(128, sr);
SecretKey skey …(log n)^k = O(n)? For k greater or equal to 1.
我的教授在课堂上向我们介绍了这个陈述,但是我不确定函数是否具有O(n)的时间复杂度.甚至类似n^2 = O(n^2)的函数f(x)如何具有运行时复杂性？
至于声明它如何等于O(n)而不是O((logn)^ k)？
我已经阅读了一些相关主题但未能解决我的问题.由于我处于学习阶段,我正在尝试实施Google的位置服务教程.麻烦的是,我没有在代码中的任何地方使用"LocationRequest.b()"但是当我按下"开始更新"按钮时出现以下错误.该应用程序随后崩溃.请让我知道我做错了什么.
错误:
Exception: Attempt to invoke virtual method 'int com.google.android.gms.location.LocationRequest.b()' on a null object reference
弹出错误的Sepcific代码位置:
protected void startLocationUpdates() {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient,mLocationRequest,mListener);
}
MainActivity.java的完整代码:
public class MainActivity extends Activity implements ConnectionCallbacks, OnConnectionFailedListener {
protected GoogleApiClient mGoogleApiClient;
/**
* Represents a geographical location.
*/
protected Location mCurrentLocation;
protected LocationRequest mLocationRequest;
protected static final String TAG = "basic-location-sample";
//UI Widgets
protected Button mStartUpdatesButton;
protected Button mStopUpdatesButton;
protected TextView mLastUpdateTimeTextView;
protected TextView mLatitudeTextView;
protected TextView mLongitudeTextView;
boolean mRequestingLocationUpdates;
protected String mLastUpdateTime;
// keys
protected …我有一个.tpl文件,其中包含我的网页的HTML代码和.php文件,我想在其中使用HTML代码并替换一些变量.例如,假设这是我的file.tpl:
<html>
<head>
<title>{page_title}</title>
</head>
<body>
Welcome to {site_name}!
</body>
</html>
我想定义{page_title}和{site_name}在我的PHP文件,并显示它们.
我们能做到这一点的方法之一是加载页面的代码放在一个变量,然后更换{page_title}和{site_name}再回应他们.
但我不知道这是最好的方法,因为我认为如果.tpl文件很大会有问题.
请帮我找到最好的方法.谢谢 :-)
是否有一个默认函数perl5大约这样做:
map {print $array[$_]} qw/1 5 7/; # i don't care about 2, 3, 4, 6 and whatever next indexes
一个功能而不是三个？
可能是NOOB问题.我有一个应该发布PUT的表单,而是作为GET发出.不知道我哪里错了.
路线(来自Rake Routes):
PUT /jira/jira_projects/:id(.:format) {:action=>"update", :controller=>"jira/jira_projects"}
使用Java脚本的表单:
<h1><%= @title %></h1>
<form action="/jira/jira_projects/" method="put">
<div id="home">
<div class="yui-g">
<div class="panel">
<h2>Project Details</h2>
<div class="panelBody">
<div id="project" class="innerPanelBody">
<input type="hidden" name="id" id="id" value="<%= @project.id %>">
<label for="name">Name:</label>
<input type="text" name="jira_name" id="name" value="<%= @project.jira_name %>">
<br>
<br>
<label for="application_ids">Applications Name:</label>
<select id='application_ids' name='death_burrito_application_ids[]' class="graph" multiple="multiple" size="5">
<% @all_applications.each do |a| %>
<% if @applications.detect {|x| x.id == a.id } %>
<option selected="selected" value="<%= a.id %>"><%= a.death_burrito_name %>
<% else %>
<option value="<%= …Rails 3.2.1
ruby 1.9.3p0(2011-10-30)[x86_64-linux]
openssl-0.9.8e-20.el5 openssl-devel-0.9.8e-20.el5 openssl-0.9.8e-20.el5
Linux 2.6.18-274.7.1.el5#1 SMP Mon Oct 17 11:57:14 EDT 2011 x86_64 x86_64 x86_64 GNU/Linux
create
create README.rdoc
create Rakefile
create config.ru
create .gitignore
create Gemfile
create app
create app/assets/images/rails.png
create app/assets/javascripts/application.js
create app/assets/stylesheets/application.css
create app/controllers/application_controller.rb
create app/helpers/application_helper.rb
create app/mailers
create app/models
create app/views/layouts/application.html.erb
create app/mailers/.gitkeep
create app/models/.gitkeep
create config
create config/routes.rb
create config/application.rb
create config/environment.rb
create config/environments
create config/environments/development.rb
create config/environments/production.rb
create config/environments/test.rb …