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// I extracted this logic from a suite of contracts I wrote in Huff meant to perform swaps as part of an AMM system. 
// This is just provide an example of how your can write smart contracts at assembly level by simply manipulating the stack and calling opcodes. 
// This is for learning purposes only


// Swap function
#define function swap() nonpayable returns ()

// These constants will be replaced by the actual values during deploy time
#define constant OWNER = 0x6dc63ab72c3b163f71ce602ea2727307cf9a40402cd20689e35f0aa0eb82b586

ndeto

Deploy Rails Application to AWS EC2

Creating AWS EC2 Instance

- login to 'AWS Management Console' (https://aws.amazon.com/console/)
- from 'Services'(in navbar) choose 'EC2'
- from 'Create Instance' section, click on 'Launch Instance'
- then select 'AMI' (Amazon Machine Image), we will be using 'Ubuntu Server 16.04 LTS (HVM)' as example
- select 'Instance Type' as per your requirement
- then click 'Next:Configure Instance Details' to continue
  change 'Configure Instance Details' or used as default settings

ndeto

class Robot
  MOVEMENTS = ['N', 'E', 'W', 'S']
  ACTIONS = ['G', 'D']

  CRATES_POSITIONS = []

  @length = 10
  @width = 10
  @is_lifting = false

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# Clean backslash characters
  def clean_str(str)
    new_str = []
    str.chars.each do |char|
      if char == "\\"
        next
      end
      new_str << char
    end

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  def filter
    # receive params
    allowed_constant_params = %w(property_type listing_type_id rooms bathrooms location)
    allowed_varying_params = %w(price)

    query = ""
    allowed_constant_params.each do |param|
      unless params[param] == ""
        if query.empty?
          query.concat("SELECT * FROM properties WHERE #{param} = '#{params[param]}'")

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function validateEmail(email) {
    var re = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;

    if (email.match(re)) {
        return true;
    } else {
        return false;
    }
}

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var phoneno = /^(07)([0-9|7])(\d){7}$/;
    if (phonenumber.match(phoneno)) {
        return true;
    } else {
        return false;
    }