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Swift

Contents:

• Setup
• Playground
  • Constants, Variables, and Optionals
  • Interpolation
  • Datatypes
  • Conditionals

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Set up macOS High Sierra 10.13.6

1 git

Open the terminal and type git. If it not installed, you will see a dialog box with a button to install it. Click on the button and git will be installed in a couple of minutes.

$ git --version
git version 2.15.2 (Apple Git-101.1)

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Binary

A binary is a bitstring where number of bits is divisible by 8.

> binary = <<0, 1, 2>>
> byte_size binary
3

> String.valid? binary

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Slim

• Home
• Github

HTML elements

p Hello world
p = user.name

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Stripe Payment Gateway

Contents:

1. Credit card encryption
2. Create customers
3. Create charges

Create an account on stripe.com and note the secret_key and publication_key. Stripe dashboard can be accessed here.

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Stripe Connect

Links:

• Home
• Docs
• API Reference

Contents:

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Twilio

• Quickstart
• Send text message
• Respond to incoming messages
• Ruby library

Sign up for the Twilio service here. After sign up, you will be redirected to dashboard.

Note down the Account SID and Auth Token on Dashboard.

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Authorize.net

Create a sandbox account here.

You will get following credentials after the setup:

• Login ID: 8R6TFt6m693
• Transaction Key: 2x72742a3pDPq5Yy
• Secret Key: Silon

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WebMock

• Github

Stub a request

Match request body and headers in stub.

let!(:stub_api_request) { stub_request(:post, 'http://api-host.com/path/') }

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zensend_ruby_api

• Home
• Dashboard
• Documentation
• Github

Go to the home page of Zensend and click Try for free to setup a test account.

Enter the details asked and go to the next step. Enter your mobile number and verify it by entering the 6-digit code sent to your number.