Articles

マンションの電流測れるIoTセンサー

社内にコーヒーサーバーを設置したとする。コーヒー代はもちろん飲んだ人が負担をするが、だれが何杯飲んだかを管理するための購買システムが必要になる。</p><p>そこで、簡単に使える購買システムを開発した。</p><p>使い方は、社員はあらかじめ入金をして、社員証をデバイスにかざしてプリペイドカードのようにコーヒーの元を購入することができる

土を使わず、インドアでレタスを作れるシステム

測定データをクラウドに上げ体重の推移を管理できるIoT体重計

Previously, when creating a Vue project using the Vue CLI, the Vue Router could be installed easily by running vue add router. However, with Vue 3 and Vite, the router is installed manually. This article presents how to do so.

Since its introduction in 2019, Svelte has quickly become one of the most loved JavaScript framework overtaking Vue.js in the State of JS ranking 2021 survey. This article presents a simple comparison of Vue.js and Svelte as an attempt to explain why.

As a NoSQL database, MongoDB can store arrays as fields of a document. This article presents how to query such documents by filtering those with arrays that contain a specific value.

The GUI of this CMS has gone through multiple versions and revisions. It started as a Vue.js SPA but was then turned into a Nuxt SSR application to improve SEO. Recently, Nuxt version 3 was released so it was again time for a refresh.

A guide to setup a TypeScript project from scratch

Using Ingress with the extensions/v1beta1 API has been deprecated in Kubernetes 1.14 and will be removed in 1.22. This article presents how to update an existing manifest to the new API, networking.k8s.io/v1.