Feby Artandi

Download the app here:
https://github.com/febyartandi/mars-rover-ruby-with-webview

MARS HOVER PROBLEM
===================================

A squad of robotic rovers are to be landed by NASA on a plateau on Mars. This plateau, which is curiously rectangular, must be navigated by the rovers so that their on-board cameras can get a complete view of the surrounding terrain to send back to Earth.

A rover’s position and location is represented by a combination of x and y co-ordinates and a letter representing one of the four cardinal compass points. The plateau is divided up into a grid to simplify navigation. An example position might be 0, 0, N, which means the rover is in the bottom left corner and facing North.

In order to control a rover, NASA sends a simple string of letters. The possible letters are ‘L’, ‘R’ and ‘M’. ‘L’ and ‘R’ makes the rover spin 90 degrees left or right respectively, without moving from its current spot. ‘M’ means move forward one grid point, and maintain the same heading.

Assume that the square directly North from (x, y) is (x, y+1).

INPUT:
The first line of input is the upper-right coordinates of the plateau, the lower-left coordinates are assumed to be 0,0.

The rest of the input is information pertaining to the rovers that have been deployed. Each rover has two lines of input. The first line gives the rover’s position, and the second line is a series of instructions telling the rover how to explore the plateau.

The position is made up of two integers and a letter separated by spaces, corresponding to the x and y co-ordinates and the rover’s orientation.

Each rover will be finished sequentially, which means that the second rover won’t start to move until the first one has finished moving.

OUTPUT
The output for each rover should be its final co-ordinates and heading.

INPUT AND OUTPUT

Test Input:
5 5
1 2 N
LMLMLMLMM
3 3 E
MMRMMRMRRM

Expected Output:
1 3 N
5 1 E

Hi,

If you need a sample rails application or maybe you’re starting a new fresh project, you doesnt need create it from a zero. You can use and edit my scratch application. This application includes
- signup
- login
- activation ( via email )
- forgot password ( send to email )
- edit profile
- create member area
- simple layout for front end and member ( include basic css )
- script to feeds table countries

To run application, Please Follow this steps:

Checkout app

Change configuration

Hope this help people !!

Hi guys,

This is quick tutorial about linkedin api – invitation by people email to join your linkedin network.

We will use linkedinapi rails plugin ( Created by Dimas Priyanto and Me base on oauth rails plugin )

• checkout plugin
  svn co http://linkedinapi.unfuddle.com/svn/linkedinapi_linkedinapi/ and copy to vendor/plugins
  username: guest, password: password
• run ruby script/console

• initialize your linkedin api key and secret key

• setting your callback

• create oauth object

• request authorize url

Open the link in your browser  as redirection url for user to do authorization process,
if user authorize it we will get params[:oauth_verifier] in our “callback_url”,
use it to authorize from request

for example:

• authorize using oauth verifier and token

• create linkedin api object

• show your linkedin profile

• invite people by email, first name and last name

That’s it, enjoy !

Some peoples talked about ajax pagination in RoR and give solutions with jquery, override class RemoteLinkRenderer etc. All solutions is “to high class” for me, I need a “stupid” solution with only will-paginate and prototype .

After some hours experiments, I’ve made the solution for create ajax pagination with only will-paginate and rjs.

See demo : http://ajax-pagination.herokugarden.com/users

The codes:

- Run ruby script/generate scaffold users first_name:string last_name:string address:string phone:string

modify:

- users_controller.rb

def index
find_users
end

def list_called_by_ajaxs
if request.xhr?
find_users
respond_to do |format|
format.js do
render :update do |page|
page.replace_html(‘list’, :partial => ‘users/list’)
end
end
end
end
end

private

def find_users
@users_per_page = 5
@users = User.all.paginate(:per_page => @users_per_page, :page => params[:page])
end

- modify users/index.html.erb<%= javascript_include_tag :defaults %>
<h1>Listing users</h1>

<%= render :partial => ‘list’%>
<div id=”loader-bottom” style=”display:none;s”><p>Loading..<br /></div>

- add users/_list.html.erb

<div id=”list”>
<%= render :partial => ‘pagination’ %>
<table border=”2″>
<tr>
<th>First name</th>
<th>Last name</th>
<th>Address</th>
<th>Phone</th>
</tr>

<% @users.each do |user| %>
<tr>
<td><%=h user.first_name %></td>
<td><%=h user.last_name %></td>
<td><%=h user.address %></td>
<td><%=h user.phone %></td>
<td><%= link_to ‘Show’, user %></td>
<td><%= link_to ‘Edit’, edit_user_path(user) %></td>
<td><%= link_to ‘Destroy’, user, :confirm => ‘Are you sure?’, :method => :delete %></td>
</tr>
<% end %>
</table>

<br />

<%= link_to ‘New user’, new_user_path %>

</div>

- add users/_pagination.html.erb

<%- if @users.total_entries <= @users_per_page-%>
<%- pages = 1 %>
<%- else -%>
<%- pages = (@users.total_entries / @users_per_page) + 1%>
<%- end -%>
<%- if pages > 1-%>
<div id =”pagination” class=”pagination” style=”margin:0 5px 0 5px;padding: 0″>
<%- current = params[:page].nil? ? 1 : params[:page].to_i -%>
<span class=”current”> Page: </span>
<%- for i in 1..pages -%>
<%- if (i == current ) -%>
<span class=”current”><%= i %></span>
<%- else -%>
<%= link_to_remote i, {
:url => (list_called_by_ajax_users_path(:page => i)),
:method => :get,
:loading => “$(‘list’).hide();$(‘loader-bottom’).show()”,
:complete =>  “$(‘list’).show();$(‘loader-bottom’).hide()”} %>
<%- end -%>
<%- end -%>
</div>

<%- end -%>

modify “config/routes.rb”

add this line: map.resources :users, :collection => {:list_called_by_ajax => :get}

Hope this stupid solutions help peoples