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Lambda: standard

# Creating a lambda
l = lambda { |name| "Hi #{name}!" }

# Executing the lambda
l.call("foo") # => Hi foo!

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Rails Rspec APIs Testing Notes

Folders Structure

  spec
  |--- apis #do not put into controllers folder. 
        |--- your_api_test_spec.rb  
  |--- controllers
  |--- models
  |--- factories
 |--- views

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{
    "presets": ["es2015"],
    "plugins": [
        "add-module-exports"
    ],
}

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def split_string(str)
  result = []
  str = str + "_" if str.length.odd?
  len = str.length / 2
  for i in 0..len-1
    arry = str[2*i, 2]
    result << arry
  end
  result.to_a
end

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import React from 'react';
import { Text, View, SafeAreaView, FlatList, WebView, Dimensions, Button, ScrollView} from 'react-native';
import { ListItem } from 'react-native-elements';
import ApolloClient from "apollo-boost";
import gql from "graphql-tag";
import { ApolloProvider } from "react-apollo";
import { Query } from "react-apollo";
import HTML from 'react-native-render-html';
import { createAppContainer, createStackNavigator} from 'react-navigation';

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class Array
  def splice(start, len, *replace)
    self[start, len] = replace
    self
  end
end

ruby-1.8.7-p352 :008 > initial_array  = [:a, :c, :h, :g, :t, :m]
 => [:a, :c, :h, :g, :t, :m] 
ruby-1.8.7-p352 :009 > initial_array.splice(2, 2, :test)

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UPDATE (March 2020, thanks @ic): I don't know the exact AMI version but yum install docker now works on the latest Amazon Linux 2. The instructions below may still be relevant depending on the vintage AMI you are using.

Amazon changed the install in Linux 2. One no-longer using 'yum' See: https://aws.amazon.com/amazon-linux-2/release-notes/

Docker CE Install

sudo amazon-linux-extras install docker
sudo service docker start

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# Load DSL and set up stages
require "capistrano/setup"

# Include default deployment tasks
require "capistrano/deploy"

# Load the SCM plugin appropriate to your project:
#
# require "capistrano/scm/hg"
# install_plugin Capistrano::SCM::Hg

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# app/graphql/types/objects/document_type.rb

module Mutations
  class CreateDocument < BaseMutation

    description "creates a document for the user in the system"

    argument :doc, ApolloUploadServer::Upload, required: true

    field :document, Types::Objects::DocumentType, null: false

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# Generate Random Passwords
curl 'https://www.random.org/passwords/?num=2&len=24&format=plain&rnd=new' 

# Create deploy user
sudo adduser deploy 
sudo adduser deploy sudo 
su deploy 
cd ../deploy/ 
 mkdir .ssh
      touch .ssh/authorized_keys