Go入門ハンズオン [準備編]

Go入門ハンズオン [準備編] はじめてのGo言語教室 13 December 2025 Ryuji Iwata Okayama, Japan

Ryuji Iwata X (Twitter) : @qt_luigi Portfolio : sites.google.com/view/ryuji-iwata-portfolio 2

お品書き • 必要なものを揃えよう • Goを準備しよう 2 3

必要なものを揃えよう 3 4

Goのコードを書く人 • マスコットキャラクターと同じ呼称で「Gopher (ごーふぁー)」 3.0 Creating your own gopher. // model sheet The model sheet is a illustration guideline for those who are interested in developing their own adaptations of the gopher. For additional background and guidance, please watch the creator's Character Study video here: https://www.youtube.com/ watch?v=4rw_B4yY69k double tooth or single tooth two ways of holding objects: under the arm nub, and by touch when seated, the bellyflesh folds in half back side front side ears blowing back, motion lines, and maybe a drop of sweat for action shots emotions are shown using eye shape, no eyebrows please GO BRAND BOOK V 1.0 PAGE 22 go.dev/s/brandbook 4 5

Goを動作させるコンピューター • OS (Windows、macOS、Linux、など) は、最新またはそれに近いものを。 • 場所はパソコン上でもクラウド上でも。 5 6

Go • オープンソースで静的型付けコンパイル形式の汎用プログラミング言語。 • 標準でCLIコマンド、共有ライブラリー、Webアプリ、モバイルアプリを生成可能。 • 用途はクラウド、ミドルウェア、組み込み、ゲーム、ブロックチェーン、など。 =GO Why Go Learn Docs Packages Community Build simple, secure, scalable systems with Go ✓ An open-source programming language supported by Google ✓ Easy to learn and great for teams ✓ Built-in concurrency and a robust standard library ✓ Large ecosystem of partners, communities, and tools Get Started Download Download packages for Windows 64-bit, macOS, Linux, and more The go command by default downloads and authenticates modules using the Go module mirror and Go checksum database run by Google. Learn more. Companies using Go Organizations in every industry use Go to power their software and services View all stories Google P AMERICAN EXPRESS mercado libre bitly CapitalOne CLOUDFARE Meta WILD LIFE go.dev/ 6 7

テキストエディター
• コードを書くために必要。
• 無償だとVisual Studio CodeやVim、有償だとGoLand、など。
• BOMなしのUTF-8のファイルが作成できるものであればO.K.
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MailList.tsx
MailListitem.tsx
Extract MailListitem into stan
AGENT SESSIONS
LOCAL CHAT AGENT
Refactoring MailList component st...
GITHUB COPILOT CLOUD AGENT
Extract MailListitem into st... 10 min
#1 +42 -24
import { for, createSignal, createMemo } from "solid-js"
import { useNavigate, useParams } from "@tanstack/solid-
import { getEmailsForMailbox } from "~/data/emails";
import { MailListItem } from "~/components/MailListItem"
export function MailList() {
const params = useParams({ strict: false }) as {
mailbox?: string;
id?: string;
};
const navigate = useNavigate();
const [query, setQuery] = createSignal("");
const mailbox = () => params.mailbox || "inbox";
const list = createMemo(() => {
const q = query().toLowerCase();
return getEmailsForMailbox(mailbox()).filter(
(e) =>
CHAT
Please update the MailList
component to abstract mail list
items into their own standalone
component.
GitHub Copilot Cloud Agent
Delegate to cloud agent
The agent will work asynchronously to
create a pull request with your requested
changes.
code.visualstudio.com/
7 8

Git • ソースコードを管理するシステムおよびコマンド。 • 外部パッケージを入手する際に必要で、多くがGitHub上で公開。 • macOSやLinuxでは標準で対応可能、Windowsでは別途インストールが必要。 ※ 今回は使用しません。 git --distributed-is-the-new-centralized Type / to search entire site... Git is a free and open source distributed version control system designed to handle everything from small to very large projects with speed and efficiency. Git is lightning fast and has a huge ecosystem of GUIs, hosting services, and command-line tools. About Git's performance and ecosystem Tools Command line tools, GUIs, and hosting services Install Binary releases for all major platforms. Learn Pro Git book, videos, tutorials, and cheat sheet Reference Git's reference documentation Community Get involved! Bug reporting, mailing list, chat, development and more. Latest source release 2.52.0 Release Notes (2025-11-27) Install for Mac GitHub Repository git-scm.com/ 8 9

Goを準備しよう 9 10

ダウンロード&インストール 基本は、公式サイトから対象OSのGoをダウンロードしてインストール。 go.dev/dl/ • 基本は「Featured downloads」から選択。 go.dev/dl/#featured • 詳しい人は「Stable versions」から選択。 go.dev/dl/#stable Featured downloads Microsoft Windows Windows 10 or later, Intel 64-bit processor go1.25.5.windows-amd64.msi Apple macOS (ARM64) macOS 12 or later, Apple 64-bit processor go1.25.5.darwin-arm64.pkg Apple macOS (x86-64) macOS 12 or later, Intel 64-bit processor go1.25.5.darwin-amd64.pkg Linux Linux 3.2 or later, Intel 64-bit processor go1.25.5.linux-amd64.tar.gz Source go1.25.5.src.tar.gz go.dev/dl/#featured 10 11

動作確認 1. ターミナル画面を起動。 • Windows : コマンドプロンプト、PowerShell • macOS, Linux : ターミナル • VS Code : メニューバーから「Terminal」-「New Terminal」を選択 2. go versionコマンドでGoが正常にインストールされていることを確認。 $ go version go version go1.25.5 darwin/amd64 11 12

Thank you Ryuji Iwata Okayama, Japan @qt_luigi 12