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Rails Active Record Query

INNER JOIN

Category.joins(:posts)

# SELECT categories.* FROM categories INNER JOIN posts ON posts.category_id = categories.id

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##Rails Submit button I18n way

en:
  helpers:
    submit:
      create: "Make New %{name}%"
      user:
        create: "Register"
 update: "Update Profile"

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##Jekyll Installation

1. Make a new directory for your blog

mkdir my-awesome-blog
cd my-awesome-blog

2. Create your .ruby-gemset and .ruby-version

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git credential-osxkeychain erase
host=github.com
protocol=https

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What's RPC?

In distributed computing, a remote procedure call (RPC) is when a computer program causes a procedure (this is what it differs from REST) to execute in another address space (commonly on another computer on a shared network), which is coded as if it were a normal (local) procedure call, without the programmer explicitly coding the details for the remote interaction.

There are multiple implementation of RPC: ONC RPC, JSON-RPC, XML-RPC, gRPC, SOAP, etc.

How RPC works?

1. The client calls the client stub. The call is a local procedure call, with parameters pushed on to the stack in the normal way.
2. The client stub packs the parameters into a message and makes a system call to send the message. Packing the parameters is called marshalling.

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What's gRPC?

In gRPC a client application can directly call methods on a server application on a different machine as if it was a local object, making it easier for you to create distributed applications and services. As in many RPC systems, gRPC is based around the idea of defining a service, specifying the methods that can be called remotely with their parameters and return types. On the server side, the server implements this interface and runs a gRPC server to handle client calls. On the client side, the client has a stub (referred to as just a client in some languages) that provides the same methods as the server.

gRPC clients and servers can communicate no matter what programming languages they're written in. For instance, you can easily create gRPC servers in C++ and clients in Ruby/Python.

Transport and Semantics

gRPC uses (Protocol Buffers, aka. Protobuf)(https://github.com/google/protobuf), for data serialization.

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Functional Programming

Week 1

Programming Paradigms

Main programming paradigms include:

Imperative Programming

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# Place your file in ~/.config/hub
github.com:
- user: huynhquancam
  oauth_token: XXX # personal token can be obtained from your Github > Settings > Security > Personal Token

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Keybase proof

I hereby claim:

• I am qcam on github.
• I am qcam (https://keybase.io/qcam) on keybase.
• I have a public key whose fingerprint is 7EAD EE10 DB51 9180 986A 30B4 1BE7 CEA2 28E5 28A9

To claim this, I am signing this object:

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<?xml version="1.0" encoding="UTF-8"?>
<breakfast_menu>
  <food>
    <name>Belgian Waffles</name>
    <price>$5.95</price>
    <description>Two of our famous Belgian Waffles with plenty of real maple syrup</description>
    <calories>650</calories>
  </food>
  <food>
    <name>Strawberry Belgian Waffles</name>