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Rahul Trikha rahult

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rahult / Main.purs
Last active August 11, 2017 10:54
Complex Number
View Main.purs
module Main where
import Prelude
newtype Complex = Complex {
real :: Number,
imaginary :: Number
instance showComplex :: Show Complex where
rahult / gist:fce1ddf795e911211f9a
Created May 12, 2015 15:07
One Name Verification
View gist:fce1ddf795e911211f9a
Verifying I am +rahult on my passcard.
rahult /
Last active August 29, 2015 14:20 — forked from jlecour/

Let's say you have a model, with an files attached, using Paperclip. You have a couple millions of those files and you're not sure that every one of them (and all its thumbnails) are still used by a database record.

You could use this rake task to recursively scan all the directories and check if the files need to be kept or destroyed.

In this example, the model is called Picture, the attachment is image and the path is partitioned like images/001/412/497/actual_file.jpg

The task is going down the path. Each time the path ends with 3 triplets of digits ("001/412/497" for example) it looks for a record with the ID 1412497. If such a record doesn't exist, the whole directory is moved to a parallel images_deleted directory. At the end you can delete the files if you like, or move them to an archive location.

You can use the "dry run" mode : to print which files would be removed

View ams_cache.rb
class User < ActiveRecord::Base; end;
class Post < ActiveRecord::Base; end;
class Comment < ActiveRecord::Base; end;
class AuthorSerializer < ActiveModel::Serializer
attributes :id, :name :created_at, :updated_at
class PostSerializer < ActiveModel::Serializer
attributes :id, :body :created_at, :updated_at

Keybase proof

I hereby claim:

  • I am rahult on github.
  • I am rahult ( on keybase.
  • I have a public key whose fingerprint is 5936 554B 0BE1 0732 6CD4 EA1F E963 03C9 1B4E AA98

To claim this, I am signing this object:

rahult / parameterize.rb
Created April 22, 2014 06:48
Parameterize text
View parameterize.rb
def parameterize(string, sep = '-')
# Turn unwanted chars into the separator
string.gsub!(/[^a-z0-9\-_]+/i, sep)
unless sep.nil? || sep.empty?
re_sep = Regexp.escape(sep)
# No more than one of the separator in a row.
string.gsub!(/#{re_sep}{2,}/, sep)
# Remove leading/trailing separator.
### Will save you're ass! ###
# Set C compiler
set -gx CC gcc
# Set architecture flags
set -gx ARCHFLAGS "-arch x86_64"
# fish functions and aliases
alias ls "ls -GF"
# fish shell greeting
rahult / credit_card_validator_spec.rb
Created July 29, 2012 14:58
Offline Credit Card Validator Specs
View credit_card_validator_spec.rb
# Ruby Version: ruby-1.9.2-p290
# Author: Rahul Trikha
# Email:
# Run: ruby credit_card_validator_spec.rb
# Include the latest version of minitest
# Must and won't predicates do not work with the
# shipped version of minitest with ruby
# Please install the latest minitest gem before running the specs
# $ gem install minitest -v=3.3.0
rahult / credit_card_validator.rb
Created July 29, 2012 14:56
Offline Credit Card Validation Script
View credit_card_validator.rb
# Ruby Version: ruby-1.9.2-p290
# Author: Rahul Trikha
# Email:
# Run: ruby credit_card_validator.rb
class CreditCardValidator
attr_accessor :card
def initialize(card=nil)
rahult / fakeout.rake
Created January 17, 2012 22:20 — forked from matthutchinson/fakeout.rake
fakeout.rake - a simple/configurable rake task that generates some random fake data for the app (using faker) at various sizes
View fakeout.rake
# a simple/configurable rake task that generates some random fake data for the app (using faker) at various sizes
# NOTE: requires the faker or ffaker gem
# sudo gem install faker -
# OR
# sudo gem install ffaker -
require 'faker'
class Fakeout