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Amol amolpujari

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  • 17:11 (UTC +05:30)
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@amolpujari
amolpujari / mailer_knows.rb
Last active January 1, 2016 12:38
My rails mailer knows request and current_user
# config/initializers/mailer_knows.rb
module MailerBefore
def before(hash)
hash.keys.each do |key|
define_method key.to_sym do
eval " @#{key} = hash[key] "
end
end
end
@amolpujari
amolpujari / mailer_helper.rb
Last active January 1, 2016 12:38
Inside an email template, I want to highlight changes made to active record object
module MailerHelper
def highligh_changes_made_to object, options={}
html = ""
attrs = options[:attrs] || object.class.attribute_names
html << "<br/><p>"
attrs.each do |attr|
html << "<p> #{attr.to_s.humanize} : "
if object.previous_changes.include? attr.to_s
@amolpujari
amolpujari / transaction_spec.rb
Last active August 29, 2015 13:56
dummy transactions
require 'spec_helper'
describe "Transaction" do
it "should handle dummy numerals" do
transaction_input(%{
x1 is I
x5 is V
x10 is X
x50 is L
x100 is C
@amolpujari
amolpujari / spec_helper.rb
Last active August 29, 2015 13:56
spec_helper.rb reading STDIO
require "#{File.dirname(__FILE__)}/../lib/transactions.rb"
include Transactions
def capture_stdout(&block)
original_stdout = $stdout
$stdout = fake = StringIO.new
begin
yield
ensure
$stdout = original_stdout
@amolpujari
amolpujari / DBCon.java
Created February 11, 2014 21:38
my first attempt of writing a java class that would hanlde multiple db connections and their status
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Properties;
@amolpujari
amolpujari / mongodb_data_modeling_and_implementations_notes.md
Created February 12, 2014 05:21
MongoDB Data Modeling and Implementations Notes

MongoDb Data Modeling Notes - v1.0

This is a rough document getting prepared for db design and architect level decisions to be made while dealing with area where one wants to consider MongoDB abd web services.

The tools would mainly include mongoDb, RSTful resources, background jobs, and possible queuing engine(RabbitMQ) to provide unit inputs to the background jobs. After measurements caching layers like ElasticSearch can be introduced as require. MySQL can be considered in few cases to support non-relational data storage as per need.

RESTful services and background jobs can be implemented using best frameworks available in Java. Or now a days extreme-service-developers are talking about wonders of Go language, hence would be great if Go language is considered for writing service layer. This is one very nice article about the REST services in Go

@amolpujari
amolpujari / egauge_simulator.py
Created February 25, 2014 06:33
egauge data simulator
push_url = None
auth_string = None
register_names = []
reporting_interval = 60
min_reporting_interval = 5
max_reporting_interval = 600
sampling_interval = 1
@amolpujari
amolpujari / pipable.rb
Last active August 29, 2015 14:06 — forked from pcreux/pipable.rb
# Elixir has pipes `|>`. Let's try to implement those in Ruby.
#
# I want to write this:
#
# email.body | RemoveSignature | HighlightMentions | :html_safe
#
# instead of:
#
# HighlightMentions.call(RemoveSignature.call(email.body)).html_safe
#
@amolpujari
amolpujari / simple_captcha.rb
Created June 9, 2015 05:21
show_simple_captcha in a liquid template
module Liquid
module Tags
module SimpleCaptcha
class HumanTest < ::Liquid::Tag
include ::ActionView::Helpers::FormTagHelper
include ::SimpleCaptcha::ViewHelper
attr_accessor :request, :session
def render(context)
@amolpujari
amolpujari / annualized_return.rb
Created April 13, 2016 09:08
annualized_return
if investment and investment.deal and investment.deal.annual_return.present?
return investment.deal.annual_return.to_i
end
return 0 if projected_earnings.blank?
return 0 if percent_profit.blank?
return 0 if percent_profit.to_f < 1
year_diff = projected_earnings.last.distribution_date.d_date.year.to_i - DateTime.now.year.to_i