Raphy Varghese vargheseraphy

http://ruby.bastardsbook.com/chapters/image-manipulation/

##Installation

Install PostgreSQL using apt-get

sudo apt-get install postgresql

For PostgreSQL to work with Ruby, we need the client (application interface) library.

Add user name and mail to git repoository

git config --global user.name "User Name"
git config --global user.email [email protected]

Some commands for the smooth git work flow

git init

initialize a git repository

git Log

Negotiation Tactic #1 – Is That Your Best Offer?

Negotiation Tactic #2 – Referencing an Expert Opinion

Negotiation Tactic #3 – Asking a Closed-Ended Question

Negotiation Tactic #4 – Asking an Open-Ended Question

Negotiation Tactic #5 – Concede Small

6. Learning to Classify Text

Detecting patterns is a central part of Natural Language Processing. Words ending in -ed tend to be past tense verbs (5.). Frequent use of will is indicative of news text (3). These observable patterns — word structure and word frequency — happen to correlate with particular aspects of meaning, such as tense and topic. But how did we know where to start looking, which aspects of form to associate with which aspects of meaning?

The goal of this chapter is to answer the following questions:

How can we identify particular features of language data that are salient for classifying it? How can we construct models of language that can be used to perform language processing tasks automatically? What can we learn about language from these models?

http://www.sitepoint.com/guide-ruby-collections-part-arrays/ http://www.tutorialspoint.com/ruby/ruby_arrays.htm

	require 'date'
	Date.parse("November 17, 2014").strftime('%Y-%m-%d')
	#=>"2014-11-17"

	Date.parse("November 17, 2014").strftime('%y/%m/%d')
	#=>"14/11/17"

	# change the '-', '/' or use any separators

	# http://www.icicletech.com/blog/web-scraping-with-ruby-using-mechanize-and-nokogiri-gems
	require "mechanize"

	url = ARGV[0]
	fp = File.new("wikilinks.txt", "w")

	agent = Mechanize.new { \|agent\| agent.user_agent_alias = "Mac Safari" }

	html = agent.get(url).body

	"hello".gsub(/[aeiou]/, '') #=> "hll*"
	"hello".gsub(/([aeiou])/, '<\1>') #=> "h<e>ll<o>"
	"hello".gsub(/./) {\|s\| s.ord.to_s + ' '} #=> "104 101 108 108 111 "
	"hello".gsub(/(?<foo>[aeiou])/, '{\k<foo>}') #=> "h{e}ll{o}"
	'hello'.gsub(/[eo]/, 'e' => 3, 'o' => '') #=> "h3ll"

	class ChangeValueTable_nameColumn_name < ActiveRecord::Migration
	def up
	db.update("UPDATE table_name SET column_name = 'new_value' WHERE party = 'old_value' ")
	end

	def down
	# action to be done after completing the up ,
	# may be deleting the column after completing the values
	end