rakibulislam

CURRENT_DATE=`date -Ru | sed 's/+0000/GMT/'`
CHECKSUM=$(echo -n "application/json,,/transactions,$CURRENT_DATE" \
  | openssl dgst -sha1 -binary -hmac "your-secret-key" \
  | base64)

curl "https://apix.casiregalii.com/transactions" \
  -X POST \
  -d '{
    "account_number": "12345678998",
    "amount": "2000.0",

rakibulislam

Subdomaining Localhost with Rails 5

I've been following this blog post on how to set up an api-only Rails 5 application. One of the sections talks about creating a subdomain for your api

Rails.application.routes.draw do
  constraints subdomain: "api" do
    scope module: "api" do

rakibulislam

HTTP status code symbols for Rails

Thanks to Cody Fauser for this list of HTTP responce codes and their Ruby on Rails symbol mappings.

Status Code Symbol
1xx Informational
100 :continue
101 :switching_protocols
102 :processing

rakibulislam

#!/usr/bin/env ruby
require "openssl"
require 'digest/sha2'
require 'base64'

# We use the AES 256 bit cipher-block chaining symetric encryption
alg = "AES-256-CBC"

# We want a 256 bit key symetric key based on some passphrase
digest = Digest::SHA256.new

rakibulislam

#SOLID Principles with ruby examples

##SRP - Single responsibility principle A class should have only a single responsibility.

Every class should have a single responsibility, and that responsibility should be entirely encapsulated. All its services should be narrowly aligned with that responsibility, this embrace the high cohesion.

##OCP - Open/closed principle Software entities should be open for extension, but closed for modification.

rakibulislam

require 'spec_helper'

# comment out `config.order = "random"` in spec_helper or run rspec with `--order default` configuration (just for illustration)
# I have Database Cleaner set up in spec_helper too
$count1 = 0
$count2 = 0

describe "let and let!" do 

  describe "let!" do

rakibulislam

Keybase proof

I hereby claim:

• I am rakibulislam on github.
• I am rakib (https://keybase.io/rakib) on keybase.
• I have a public key ASAIuXJ_ua2Q5531Z7ixDx40nj8Ynj-0f4SgSg0bG3nRPwo

To claim this, I am signing this object:

rakibulislam

Javascript Handbook

A hand crafted markdown document contains all major Javascript topics covered, taken from different sources. Brush Up your JS memory.

Comments

---

Single line comments start with //. For multi-line commands, you use /* ... */

// This is a single line comment

rakibulislam

  PASSWORD_FORMAT = /\A
    (?=.{8,})          # Must contain 8 or more characters
    (?=.*\d)           # Must contain a digit
    (?=.*[a-z])        # Must contain a lower case character
    (?=.*[A-Z])        # Must contain an upper case character
    (?=.*[[:^alnum:]]) # Must contain a symbol
  /x
  
  # validates_format_of :password,
  #   with: /\A(?=.{8,})(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%^&+=]).*\z/

rakibulislam

# fibonacci
# https://stackoverflow.com/questions/44837662/named-anonymous-functions-in-elixir/44837880#44837880

defmodule Fibonacci do
  def get(n) when n <= 1, do: 1
  def get(n), do: get(n-1) + get(n-2)
end

# Elixir how to iterate over two lists at once to produce a new list?
# https://stackoverflow.com/questions/44938494/elixir-how-to-iterate-over-two-lists-at-once-to-produce-a-new-list/44940454#44940454