Install Ruby on Rails on Ubuntu

By -
First we need to make sure that the system which we are using is up to date , so for that run the command below
sudo apt-get update


We'll be installing some software that needs to be built so we'll need to get packages required for compiling. With Ubuntu, you can type this single command and get everything you need:

sudo apt-get install build-essential
 
Once you've got the tools, it's time to install MySQL and Ruby

sudo apt-get install ruby ri rdoc mysql-server libmysql-ruby ruby1.8-dev irb1.8 libmysql-ruby1.8 libreadline-ruby1.8 libruby1.8 mysql-client-5.1 mysql-common mysql-server-5.1 rdoc1.8 ri1.8 ruby1.8 irb libopenssl-ruby libopenssl-ruby1.8 mysql-server-core-5.1 libmysqlclient16 libreadline5 psmisc

If you hadn't previously installed MySQL you'll be asked to set a root password. You don't have to, of course (it will bug you no fewer than 3 times if you opt not to) but I strongly recommend it. You'll need this password when you populate your rails config/database.yml file so be sure not to forget it.

wget http://rubyforge.org/frs/download.php/60718/rubygems-1.3.5.tgz
tar xvzf rubygems-1.3.5.tgz
cd rubygems-1.3.5
sudo ruby setup.rb
 
On the command line, type gem -v. if you get this message we need to make some symlinks:

The program 'gem' can be found in the following packages:
 * rubygems1.8
 * rubygems1.9
Try: sudo apt-get install 
-bash: gem: command not found
 
Let's create those symlinks now:

sudo ln -s /usr/bin/gem1.8 /usr/local/bin/gem
sudo ln -s /usr/bin/ruby1.8 /usr/local/bin/ruby
sudo ln -s /usr/bin/rdoc1.8 /usr/local/bin/rdoc
sudo ln -s /usr/bin/ri1.8 /usr/local/bin/ri
sudo ln -s /usr/bin/irb1.8 /usr/local/bin/irb
 
 
Other Libraries installation
sudo apt-get install libc6 libpcre3 libpcre3-dev libpcrecpp0 libssl0.9.8 libssl-dev zlib1g zlib1g-dev lsb-base

Rails Installation
sudo gem install rails

Specific Version installation of Rails
sudo gem install rails -v=2.3.11

You do not need to add sudo if you are using RVM.

Mysql Gem Installation

sudo apt-get install libmysqlclient-dev
sudo gem install mysql --no-rdoc --no-ri

Comments

Post a Comment

Popular posts from this blog

Inserting and Moving elements inside Ruby Array

By -
Here's is an array with 5 elements 2.1.2 :001 > arr = ["a", "b", "c", "d", "e"] => ["a", "b", "c", "d", "e"] Lets look at few different cases Insert a new element at starting position Using unshift 2.1.2 :002 > arr.unshift("f") => ["f", "a", "b", "c", "d", "e"] Using insert 2.1.2 :005 > arr.insert(0, "f") => ["f", "a", "b", "c", "d", "e"] In the above example 0 is the position(index) Move existing element from one position to another The element in this case is "e" Using uniq to show only unique elements 2.1.2 :009 > arr.insert(0, "e").uniq => ["e", "a", "b", "c", "d"] With uniq we are only showing unique records but the element is listed
Read more

Remove duplicates from a JavaScript Array

By -
In JavaScript, you may combine the indexOf() method and the filter() method to get rid of duplicates from an array function removeDuplicates(arr) { return arr.filter((el, index) => arr.indexOf(el) === index); } let numbers = [1, 2, 3, 3, 4, 4, 5]; let uniqueNumbers = removeDuplicates(numbers); console.log(uniqueNumbers); // [1, 2, 3, 4, 5] The removeDuplicates() function in this code accepts an array as an argument and produces a new array that is empty of duplicates. This is accomplished by creating a new array with the filter() method that only contains elements that are unique within the original array. A callback function is provided as an argument to the filter() method, which is used to filter each element of the array. By comparing the current element's index to the output of executing indexOf() on the original array, the callback function determines if the current element exists only once in the array. The element is added to the new array if the two indices a
Read more

Sending Binary Data over the Network with Json

By -
First, you need to open the file. Since the file is binary, you have to open it with an additional “b” flag. Here i am sending a zip file f = File.open("path/myzip.zip", "rb")   Next, you have to do binary-to-text encoding on the binary file because the JSON will complain if you try to feed it a binary string. To overcome this obstacle, you need to apply Base64 encoding. file_content = Base64.b64encode(f.read())   After you have a text representation of the data, you can then use JSON to package it, you can use to_json to convert in to json {:file=>file_content}.to_json In your  Rails application you can do this like render :layout=>false , :json => {:file=> file_content}.to_json
Read more