---
title: "今日の学び | OOZOU"
description: "OOZOUチームによる短く実践的なメモ。日々のエンジニアリングとデザインの仕事から得た小さな学びを紹介します。"
canonical: https://oozou.com/ja/til
locale: ja
---

# 今日の学び

> OOZOUチームによる短く実践的なメモ。日々のエンジニアリングとデザインの仕事から得た小さな学びを紹介します。

## Topics

- [ruby](https://oozou.com/ja/til-topics/ruby) ([markdown](https://oozou.com/ja/til-topics/ruby.md)) (12)
- [javascript](https://oozou.com/ja/til-topics/javascript) ([markdown](https://oozou.com/ja/til-topics/javascript.md)) (3)
- [elixir](https://oozou.com/ja/til-topics/elixir) ([markdown](https://oozou.com/ja/til-topics/elixir.md)) (1)
- [vim](https://oozou.com/ja/til-topics/vim) ([markdown](https://oozou.com/ja/til-topics/vim.md)) (7)
- [macos](https://oozou.com/ja/til-topics/macos) ([markdown](https://oozou.com/ja/til-topics/macos.md)) (10)
- [ruby on rails](https://oozou.com/ja/til-topics/ruby-on-rails) ([markdown](https://oozou.com/ja/til-topics/ruby-on-rails.md)) (22)
- [shell](https://oozou.com/ja/til-topics/shell) ([markdown](https://oozou.com/ja/til-topics/shell.md)) (30)
- [figma](https://oozou.com/ja/til-topics/figma) ([markdown](https://oozou.com/ja/til-topics/figma.md)) (4)
- [cli](https://oozou.com/ja/til-topics/cli) ([markdown](https://oozou.com/ja/til-topics/cli.md)) (3)
- [heroku](https://oozou.com/ja/til-topics/heroku) ([markdown](https://oozou.com/ja/til-topics/heroku.md)) (1)

## Notes

- [YOLOエイリアスでClaude Codeを完全自律で実行する](https://oozou.com/ja/til/run-claude-code-fully-autonomously-with-a-yolo-alias-190) ([markdown](https://oozou.com/ja/til/run-claude-code-fully-autonomously-with-a-yolo-alias-190.md)) · cli · 2026-02-16
- [GNU/LinuxのNVIDIA専用GPUでコマンドを実行する（例：ollama）](https://oozou.com/ja/til/run-a-command-on-your-gnu-linux-dedicated-nvidia-gpu-e-g-ollama-189) ([markdown](https://oozou.com/ja/til/run-a-command-on-your-gnu-linux-dedicated-nvidia-gpu-e-g-ollama-189.md)) · cli · 2024-03-20
- [Punditポリシーで許可パラメータをデフォルトとアクション別に管理する](https://oozou.com/ja/til/use-pundit-policies-to-manage-permitted-parameters-defaults-and-per-action-188) ([markdown](https://oozou.com/ja/til/use-pundit-policies-to-manage-permitted-parameters-defaults-and-per-action-188.md)) · ruby-on-rails · 2022-02-10
- [Turboでのフォーム送信には `requestSubmit` を使う](https://oozou.com/ja/til/use-requestsubmit-for-form-submits-with-turbo-155) ([markdown](https://oozou.com/ja/til/use-requestsubmit-for-form-submits-with-turbo-155.md)) · ruby-on-rails · 2022-01-31
- [GitHub Actions で Rubocop と ESLint にバンドルされた gem を無視させる](https://oozou.com/ja/til/ignore-bundled-gems-for-rubocop-and-eslint-in-github-actions-154) ([markdown](https://oozou.com/ja/til/ignore-bundled-gems-for-rubocop-and-eslint-in-github-actions-154.md)) · ruby-on-rails · 2022-01-19
- [「部分」スクリーンキャプチャやプレーンな枠線の画像に macOS 風のドロップシャドウを追加する](https://oozou.com/ja/til/add-a-macos-style-drop-shadow-to-your-partial-screen-captures-or-plain-bordered-images-153) ([markdown](https://oozou.com/ja/til/add-a-macos-style-drop-shadow-to-your-partial-screen-captures-or-plain-bordered-images-153.md)) · macos · 2021-08-20
- [色相塗りつぶし効果を重ねたオーバーレイレイヤーでモノクロ画面を作る](https://oozou.com/ja/til/create-monochrome-screen-using-overlay-layers-covered-with-hue-fill-effect-152) ([markdown](https://oozou.com/ja/til/create-monochrome-screen-using-overlay-layers-covered-with-hue-fill-effect-152.md)) · figma · 2021-06-22
- [⌥option を押しながら入力フィールド上をクリック＆ドラッグしてサイズを調整する](https://oozou.com/ja/til/hold-option-while-click-drag-along-an-input-field-to-adjust-sizing-118) ([markdown](https://oozou.com/ja/til/hold-option-while-click-drag-along-an-input-field-to-adjust-sizing-118.md)) · figma · 2021-06-18
- [git check-ignore](https://oozou.com/ja/til/git-check-ignore-117) ([markdown](https://oozou.com/ja/til/git-check-ignore-117.md)) · cli · 2021-05-25
- [先頭ドット記法を使った複数行の Ruby ブロックを Pry に貼り付けられるようにする](https://oozou.com/ja/til/allow-pasting-multiline-ruby-blocks-in-pry-when-using-leading-dot-notation-116) ([markdown](https://oozou.com/ja/til/allow-pasting-multiline-ruby-blocks-in-pry-when-using-leading-dot-notation-116.md)) · ruby · 2021-04-30
- [Rails 6、Ruby 3、Bootstrap 5 と Hotwire](https://oozou.com/ja/til/rails-6-ruby-3-bootstrap-5-and-hotwire-115) ([markdown](https://oozou.com/ja/til/rails-6-ruby-3-bootstrap-5-and-hotwire-115.md)) · ruby-on-rails · 2021-04-18
- [Figma でテキストオブジェクトをタイトルケースに変換する](https://oozou.com/ja/til/convert-text-object-to-title-case-in-figma-114) ([markdown](https://oozou.com/ja/til/convert-text-object-to-title-case-in-figma-114.md)) · figma · 2021-02-17
- [Heroku の Slug サイズを削減する](https://oozou.com/ja/til/reduce-heroku-slug-size-113) ([markdown](https://oozou.com/ja/til/reduce-heroku-slug-size-113.md)) · heroku · 2021-01-06
- [BashとZshでシークレット（プライベート）なコマンドを実行する](https://oozou.com/ja/til/run-incognito-private-commands-for-bash-and-zsh-112) ([markdown](https://oozou.com/ja/til/run-incognito-private-commands-for-bash-and-zsh-112.md)) · shell · 2020-12-08
- [SVG を PNG に変換する](https://oozou.com/ja/til/convert-svg-to-png-79) ([markdown](https://oozou.com/ja/til/convert-svg-to-png-79.md)) · macos · 2020-11-07
- [Figma での CMD+クリックの挙動](https://oozou.com/ja/til/cmd-click-behaviour-in-figma-78) ([markdown](https://oozou.com/ja/til/cmd-click-behaviour-in-figma-78.md)) · figma · 2020-10-31
- [Rails の Cache-Control](https://oozou.com/ja/til/rails-cache-control-77) ([markdown](https://oozou.com/ja/til/rails-cache-control-77.md)) · ruby-on-rails · 2020-10-27
- [Homebrewでpostgresデータベースをアップグレードする](https://oozou.com/ja/til/upgrade-postgres-database-with-homebrew-76) ([markdown](https://oozou.com/ja/til/upgrade-postgres-database-with-homebrew-76.md)) · shell · 2020-10-22
- [Heroku の rails console での入力を修正する](https://oozou.com/ja/til/fix-input-on-heroku-s-rails-console-73) ([markdown](https://oozou.com/ja/til/fix-input-on-heroku-s-rails-console-73.md)) · ruby-on-rails · 2020-10-14
- [式展開なしの Heredoc](https://oozou.com/ja/til/heredoc-without-interpolation-74) ([markdown](https://oozou.com/ja/til/heredoc-without-interpolation-74.md)) · ruby · 2020-10-14
- [RailsでDOM用の一意なIDを生成する](https://oozou.com/ja/til/unique-id-for-dom-in-rails-75) ([markdown](https://oozou.com/ja/til/unique-id-for-dom-in-rails-75.md)) · ruby-on-rails · 2020-10-14
- [Rails 5 の attributes API に新しい型を追加する](https://oozou.com/ja/til/add-new-types-to-rails-5-attributes-api-13) ([markdown](https://oozou.com/ja/til/add-new-types-to-rails-5-attributes-api-13.md)) · ruby-on-rails · 2020-10-13
- [macOS の Dock にスペーサーを追加してアプリをグループ分けする](https://oozou.com/ja/til/add-spacers-to-your-macos-app-dock-to-make-groups-27) ([markdown](https://oozou.com/ja/til/add-spacers-to-your-macos-app-dock-to-make-groups-27.md)) · macos · 2020-10-13
- [Amazon AWS S3 CLI で権限を指定してコピーする](https://oozou.com/ja/til/amazon-aws-s3-cli-copy-with-set-perms-14) ([markdown](https://oozou.com/ja/til/amazon-aws-s3-cli-copy-with-set-perms-14.md)) · shell · 2020-10-13
- [怒りの Docker パージ](https://oozou.com/ja/til/angry-docker-purge-72) ([markdown](https://oozou.com/ja/til/angry-docker-purge-72.md)) · shell · 2020-10-13
- [HTTP を介さずに ActiveStorage にファイルを添付する](https://oozou.com/ja/til/attaching-file-to-activestorage-without-http-19) ([markdown](https://oozou.com/ja/til/attaching-file-to-activestorage-without-http-19.md)) · ruby-on-rails · 2020-10-13
- [Ruby で中間階層のハッシュテーブルを自動生成する](https://oozou.com/ja/til/automagical-intermediate-level-hashtables-in-ruby-62) ([markdown](https://oozou.com/ja/til/automagical-intermediate-level-hashtables-in-ruby-62.md)) · ruby · 2020-10-13
- [同じ名前 + 接尾辞でファイルをバックアップする](https://oozou.com/ja/til/back-up-a-file-with-same-name-prefix-42) ([markdown](https://oozou.com/ja/til/back-up-a-file-with-same-name-prefix-42.md)) · shell · 2020-10-13
- [Bash のエイリアスと魔法](https://oozou.com/ja/til/bash-aliases-and-magic-46) ([markdown](https://oozou.com/ja/til/bash-aliases-and-magic-46.md)) · shell · 2020-10-13
- [Elixir でアナグラムを計算する](https://oozou.com/ja/til/calculate-anagrams-in-elixir-23) ([markdown](https://oozou.com/ja/til/calculate-anagrams-in-elixir-23.md)) · elixir · 2020-10-13
- [rbenv で単一コマンドだけ Ruby のバージョンを変更する](https://oozou.com/ja/til/change-ruby-version-for-single-command-with-rbenv-68) ([markdown](https://oozou.com/ja/til/change-ruby-version-for-single-command-with-rbenv-68.md)) · ruby · 2020-10-13
- [macOS でシステム名を変更する](https://oozou.com/ja/til/change-system-names-on-macos-16) ([markdown](https://oozou.com/ja/til/change-system-names-on-macos-16.md)) · macos · 2020-10-13
- [VS Code の Go to definition を Cmd+Click に変更する](https://oozou.com/ja/til/change-vs-code-go-to-definition-to-cmd-click-59) ([markdown](https://oozou.com/ja/til/change-vs-code-go-to-definition-to-cmd-click-59.md)) · ruby · 2020-10-13
- [IKEA の商品在庫を確認する](https://oozou.com/ja/til/check-for-ikea-item-availability-70) ([markdown](https://oozou.com/ja/til/check-for-ikea-item-availability-70.md)) · shell · 2020-10-13
- [シェルスクリプトでコマンドの存在を確認する](https://oozou.com/ja/til/check-if-command-exists-with-shell-script-52) ([markdown](https://oozou.com/ja/til/check-if-command-exists-with-shell-script-52.md)) · shell · 2020-10-13
- [Chrome のタブ操作](https://oozou.com/ja/til/chrome-tab-manipulation-38) ([markdown](https://oozou.com/ja/til/chrome-tab-manipulation-38.md)) · macos · 2020-10-13
- [brew の古いフォーミュラをクリーンアップする](https://oozou.com/ja/til/cleanup-stale-formulas-on-brew-4) ([markdown](https://oozou.com/ja/til/cleanup-stale-formulas-on-brew-4.md)) · macos · 2020-10-13
- [Enumerable から Hash を作成する (Rails 6.0)](https://oozou.com/ja/til/create-a-hash-from-an-enumerable-rails-6-0-6) ([markdown](https://oozou.com/ja/til/create-a-hash-from-an-enumerable-rails-6-0-6.md)) · ruby-on-rails · 2020-10-13
- [冪等なマイグレーションを作成する](https://oozou.com/ja/til/create-idempotent-migrations-28) ([markdown](https://oozou.com/ja/til/create-idempotent-migrations-28.md)) · ruby-on-rails · 2020-10-13
- [独自の git コマンド (エイリアス) を作る](https://oozou.com/ja/til/create-your-own-git-commands-aliases-15) ([markdown](https://oozou.com/ja/til/create-your-own-git-commands-aliases-15.md)) · shell · 2020-10-13
- [Git でマージ済みのブランチを削除する](https://oozou.com/ja/til/delete-already-merged-branchs-in-git-36) ([markdown](https://oozou.com/ja/til/delete-already-merged-branchs-in-git-36.md)) · shell · 2020-10-13
- [マージ済みの git ブランチを削除する](https://oozou.com/ja/til/delete-merged-git-branches-51) ([markdown](https://oozou.com/ja/til/delete-merged-git-branches-51.md)) · shell · 2020-10-13
- [JS の分割代入](https://oozou.com/ja/til/destructuring-assignment-in-js-22) ([markdown](https://oozou.com/ja/til/destructuring-assignment-in-js-22.md)) · javascript · 2020-10-13
- [Git でローカルファイルをリモートのバージョンと diff する](https://oozou.com/ja/til/diff-a-local-file-with-remote-version-in-git-35) ([markdown](https://oozou.com/ja/til/diff-a-local-file-with-remote-version-in-git-35.md)) · shell · 2020-10-13
- [コミットからブランチを見つける](https://oozou.com/ja/til/find-a-branch-based-on-a-commit-53) ([markdown](https://oozou.com/ja/til/find-a-branch-based-on-a-commit-53.md)) · shell · 2020-10-13
- [以前のコミットをリポジトリに強制プッシュする](https://oozou.com/ja/til/force-push-previous-commit-to-repo-44) ([markdown](https://oozou.com/ja/til/force-push-previous-commit-to-repo-44.md)) · shell · 2020-10-13
- [現在の git ブランチ名を取得する](https://oozou.com/ja/til/get-current-git-branch-name-43) ([markdown](https://oozou.com/ja/til/get-current-git-branch-name-43.md)) · shell · 2020-10-13
- [接続中の Wi-Fi のパスワードを取得する](https://oozou.com/ja/til/get-the-password-of-the-wifi-you-re-on-9) ([markdown](https://oozou.com/ja/til/get-the-password-of-the-wifi-you-re-on-9.md)) · macos · 2020-10-13
- [ファイルの Git 履歴を追う（GUI）](https://oozou.com/ja/til/go-through-a-file-git-history-gui-67) ([markdown](https://oozou.com/ja/til/go-through-a-file-git-history-gui-67.md)) · shell · 2020-10-13
- [JavaScript で属性付きの HTML 要素を 1 行で作成する方法](https://oozou.com/ja/til/how-to-create-an-html-element-with-attributes-in-one-line-in-javascript-69) ([markdown](https://oozou.com/ja/til/how-to-create-an-html-element-with-attributes-in-one-line-in-javascript-69.md)) · javascript · 2020-10-13
- [プロジェクト内の god object を見つける方法（Rails）](https://oozou.com/ja/til/how-to-find-god-objects-in-your-project-rails-40) ([markdown](https://oozou.com/ja/til/how-to-find-god-objects-in-your-project-rails-40.md)) · ruby-on-rails · 2020-10-13
- [Vim の終了方法](https://oozou.com/ja/til/how-to-quit-vim-29) ([markdown](https://oozou.com/ja/til/how-to-quit-vim-29.md)) · vim · 2020-10-13
- [本当に!! vim を終了する方法](https://oozou.com/ja/til/how-to-really-quit-vim-30) ([markdown](https://oozou.com/ja/til/how-to-really-quit-vim-30.md)) · vim · 2020-10-13
- [VIM で sudo を使ってファイルを保存する方法](https://oozou.com/ja/til/how-to-save-a-file-with-sudo-in-vim-18) ([markdown](https://oozou.com/ja/til/how-to-save-a-file-with-sudo-in-vim-18.md)) · vim · 2020-10-13
- [別のアクションに送信する HTML フォーム](https://oozou.com/ja/til/html-forms-that-submit-to-another-action-10) ([markdown](https://oozou.com/ja/til/html-forms-that-submit-to-another-action-10.md)) · ruby-on-rails · 2020-10-13
- [以前に設定した order を上書きしたい場合](https://oozou.com/ja/til/if-you-want-to-override-previously-set-order-25) ([markdown](https://oozou.com/ja/til/if-you-want-to-override-previously-set-order-25.md)) · ruby-on-rails · 2020-10-13
- [Bundler のパフォーマンスを改善する](https://oozou.com/ja/til/improve-bundler-performance-56) ([markdown](https://oozou.com/ja/til/improve-bundler-performance-56.md)) · ruby · 2020-10-13
- [固まった rails を kill する](https://oozou.com/ja/til/kill-rails-that-got-stuck-63) ([markdown](https://oozou.com/ja/til/kill-rails-that-got-stuck-63.md)) · shell · 2020-10-13
- [応答しなくなった SSH セッションを kill する](https://oozou.com/ja/til/kill-unresponsive-ssh-session-65) ([markdown](https://oozou.com/ja/til/kill-unresponsive-ssh-session-65.md)) · shell · 2020-10-13
- [数を制限した has_many 関連](https://oozou.com/ja/til/limited-has_many-associations-31) ([markdown](https://oozou.com/ja/til/limited-has_many-associations-31.md)) · ruby-on-rails · 2020-10-13
- [特定のディレクトリを除いてディレクトリ構造を一覧表示する](https://oozou.com/ja/til/list-directory-structure-except-one-or-more-dirs-24) ([markdown](https://oozou.com/ja/til/list-directory-structure-except-one-or-more-dirs-24.md)) · shell · 2020-10-13
- [モデル名を一覧表示する](https://oozou.com/ja/til/list-your-model-names-58) ([markdown](https://oozou.com/ja/til/list-your-model-names-58.md)) · ruby-on-rails · 2020-10-13
- [hub を使ってコマンドラインから PR を作成する](https://oozou.com/ja/til/make-a-pr-from-command-line-using-hub-3) ([markdown](https://oozou.com/ja/til/make-a-pr-from-command-line-using-hub-3.md)) · shell · 2020-10-13
- [私がよく使う Slack ショートカット](https://oozou.com/ja/til/my-most-used-slack-shortcuts-49) ([markdown](https://oozou.com/ja/til/my-most-used-slack-shortcuts-49.md)) · macos · 2020-10-13
- [optional なリレーション + RSpec w/shoulda-matchers](https://oozou.com/ja/til/optional-relation-rspec-w-shoulda-matchers-41) ([markdown](https://oozou.com/ja/til/optional-relation-rspec-w-shoulda-matchers-41.md)) · ruby · 2020-10-13
- [Postgres の関数と Non-sargable なクエリ](https://oozou.com/ja/til/postgres-functions-non-sargable-queries-48) ([markdown](https://oozou.com/ja/til/postgres-functions-non-sargable-queries-48.md)) · ruby-on-rails · 2020-10-13
- [PostgreSQL の UPDATE Join ](https://oozou.com/ja/til/postgresql-update-join-64) ([markdown](https://oozou.com/ja/til/postgresql-update-join-64.md)) · ruby-on-rails · 2020-10-13
- [どの Vim モードでも行を素早く上下に移動する](https://oozou.com/ja/til/quickly-move-lines-up-and-down-in-any-vim-mode-37) ([markdown](https://oozou.com/ja/til/quickly-move-lines-up-and-down-in-any-vim-mode-37.md)) · vim · 2020-10-13
- [ruby 2.6 に同梱された bundler を削除する](https://oozou.com/ja/til/remove-ruby-2-6-bundled-bundler-39) ([markdown](https://oozou.com/ja/til/remove-ruby-2-6-bundled-bundler-39.md)) · ruby · 2020-10-13
- [ブランチから不要なコミットを削除する](https://oozou.com/ja/til/remove-unwanted-commit-from-your-branch-34) ([markdown](https://oozou.com/ja/til/remove-unwanted-commit-from-your-branch-34.md)) · shell · 2020-10-13
- [VIMでファイル名を変更する](https://oozou.com/ja/til/rename-files-in-vim-55) ([markdown](https://oozou.com/ja/til/rename-files-in-vim-55.md)) · vim · 2020-10-13
- [DELETE後にPostgresのテーブルシーケンスをリセットする](https://oozou.com/ja/til/reset-postgres-table-sequence-after-delete-66) ([markdown](https://oozou.com/ja/til/reset-postgres-table-sequence-after-delete-66.md)) · macos · 2020-10-13
- [Gitで削除したファイルを復元する](https://oozou.com/ja/til/restore-a-deleted-file-in-git-5) ([markdown](https://oozou.com/ja/til/restore-a-deleted-file-in-git-5.md)) · shell · 2020-10-13
- [現在のブランチに対してrubocopを実行する](https://oozou.com/ja/til/run-rubocop-against-your-current-branch-21) ([markdown](https://oozou.com/ja/til/run-rubocop-against-your-current-branch-21.md)) · ruby · 2020-10-13
- [コミット前にrubocopを実行する](https://oozou.com/ja/til/run-rubocop-before-commit-8) ([markdown](https://oozou.com/ja/til/run-rubocop-before-commit-8.md)) · ruby · 2020-10-13
- [同じコマンドを異なる入力に対して実行する](https://oozou.com/ja/til/run-same-command-on-different-input-inputs-71) ([markdown](https://oozou.com/ja/til/run-same-command-on-different-input-inputs-71.md)) · shell · 2020-10-13
- [RailsでscopeとscopeをORで組み合わせる](https://oozou.com/ja/til/scope-or-scope-in-rails-11) ([markdown](https://oozou.com/ja/til/scope-or-scope-in-rails-11.md)) · ruby-on-rails · 2020-10-13
- [過去のコミットで削除されたファイルを確認する [git]](https://oozou.com/ja/til/see-deleted-files-in-previous-commits-git-60) ([markdown](https://oozou.com/ja/til/see-deleted-files-in-previous-commits-git-60.md)) · shell · 2020-10-13
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