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個人アプリ開発日記 #3

まずはuserリソースから ユーザー登録機能 ログイン機能 ユーザー詳細表示機能 ユーザー編集機能 ユーザー削除機能 を実装していきます! users_controller の実装 class UsersController < ApplicationController include SessionsHelper before_action :set_user, only: [:show,:edit,:update,:correct_user] before_action :logged_in_user, only: [:index,:edit,:update] before_action...

Vaughan Jones and Kaikoura

Vaughan Jones, one of the greatest mathematicians from New Zealand, passed away on September 6 at 67. Jones is an expert in knot theory among other areas and received the Fields Medal in 1990.The Jones polynomial captures information about knots. Vaughan Jones himself co-authored a paper on a polynomial-time quantum algorithm for approximating the Jones polynomial, one of the few natural problems outside of factoring that has an...