Flutter Introduction | App Creation ~ Running on Android Emulator and iOS Simulator

A Flutter getting-started walkthrough — install, fix flutter doctor issues, and run on Android Emulator and iOS Simulator.

Solved Android 10 Tethering Issue

Fixing broken tethering on Android 10 by tweaking the IIJmio APN configuration.

[G Suite] Settings and Rules for Sharing Google Drive with External Organizations and Personal Gmail Accounts

Operating rules and steps for sharing G Suite Google Drive with external orgs and personal Gmail accounts.

[G Suite] Internal Operating Rules for Google Calendar

Internal Google Calendar rules in G Suite: personal-to-company import OK, company-to-personal export NG.

Steps to Request Release and Change GitHub Username

Requesting release of an inactive GitHub username and changing your account to it, with a sample support message.

[G Suite] Whitelisted Domains and Google Drive Sharing Settings

How to whitelist an external domain in G Suite so it can be added to a shared drive.

How to Deploy cors-anywhere to Heroku

Deploying cors-anywhere to Heroku to run your own CORS proxy.

How to Send Slack Messages with Google Apps Script (GAS)

Sample code for calling a Slack Incoming Webhook from Google Apps Script via UrlFetchApp.

'Corporate Engineer Night #2: We'll Become Beloved Corporate IT' Participation Report #CorporateEngineerNight

A report from Corporate Engineer Night #2 in Tokyo, with LT summaries and startup corporate-IT advice from the after-party.

Google Drive Shared Drive and Folder Recommended Structure [For Corporations]

A recommended Google Drive shared drive and folder structure for corporations that have just adopted G Suite.

G Suite Administrator Post-Implementation Configuration Checklist

A post-deployment G Suite admin checklist — security, end-user access, Drive sharing, and email hardening.

Notion Introduction

A curated set of articles for going from Notion beginner to proficient user.

VALUE-DOMAIN DNS Settings Not Reflecting Due to Unconfigured Name Servers

How to fix VALUE-DOMAIN DNS not reflecting by configuring the name servers to ns*.value-domain.com.

[G Suite] How to Configure Mandatory Two-Factor Authentication

Reference links, my configuration, and an announcement email template for enforcing 2FA in G Suite.

.jp .co.jp Domain Registration and Management Service Comparison Survey Report

Comparing .jp and .co.jp registrars for corporate use, filtering on two-factor authentication and Whois privacy.

Book Review: Insights from 'A Not-So-Boring Future Found in Estonia, Leading the Way with Blockchain and AI'

Takeaways from Estonia's e-government — X-Road and the idea that data preservation is enough to rebuild a nation — applied to software design.

Express + Mongoose MongoDB Connection Configuration Sample Code

Sample code for connecting Express + Mongoose to MongoDB, walked through commit by commit.

Books I'd Recommend to Engineering Managers

Books I recommend to Engineering Managers, gathered as I handed off the EM role.

[Nginx] add_header Not Reflected Due to Overwrite Issue and Solution

Why Nginx add_header at the server level disappears when a location block adds one, and how to work around it.

How to Create Fixed URLs for Google Hangouts

Create a fixed Google Hangouts URL from a personal account by extracting a far-future Google Calendar video conference URL.

Personal Metrics for Story Points in Scrum Development

A personal Fibonacci story-point to time conversion table, anchored on the Pomodoro Technique.

ESLint Installation and Initial Setup for Express (Node.js) Projects

Installing and configuring ESLint in an Express (Node.js) project, walked through as a PR.

[JavaScript] Array.includes vs Array.indexOf Performance Comparison

A performance comparison of Array.includes vs Array.indexOf on jsPerf and across Node.js versions.

[Mongoose] How to Fix (node:42424) DeprecationWarning: current Server Discovery and Monitoring engine is deprecated, and will be removed in a future version. To use the new Server Discover and Monitoring engine, pass option { useUnifiedTopology: true } to the MongoClient constructor.

Fix the Server Discovery and Monitoring DeprecationWarning with useUnifiedTopology: true.

[Mongoose] How to Fix (node:42286) DeprecationWarning: current URL string parser is deprecated, and will be removed in a future version. To use the new parser, pass option { useNewUrlParser: true } to MongoClient.connect.

Fix the MongoDB URL parser DeprecationWarning by passing useNewUrlParser: true to mongoose.connect.

Amazon Elasticsearch Service 2.3 [script_exception] scripts of type [inline], operation [search] and lang [mustache] are disabled Error

Responding to the Mustache script_exception on Amazon Elasticsearch Service 2.3: drop Mustache or migrate to 5.1+.

[JavaScript] How to Extract Only URL from CSS background-image

Basic and class-scoped samples for pulling the URL out of a CSS background-image value with regex.

How to Measure Total Execution Time of MongoDB Queries

Measure total execution time of a multi-line MongoDB query block with a simple new Date() diff.

How to Prevent Sending JavaScript Errors from Specific Browsers with Sentry raven-js

Sample code that filters out errors from unsupported browsers (like pre-IE11) using Sentry raven-js's shouldSendCallback.

Free, Long-Duration, Multi-User Web Video Conferencing Tools

Comparing free web conferencing tools for long, multi-user calls — Google Hangouts, Skype, Zoom, and Whereby.

ReconnectingWebSocket - JavaScript Library for Handling WebSocket Auto-Reconnection Elegantly

Side-by-side sample code for WebSocket auto-reconnection using the raw API vs the ReconnectingWebSocket library.

Upgrading Windows 7 to Windows 10 (Lenovo G550, Backup, Memory Upgrade)

Upgrading a Lenovo G550 from Windows 7 to Windows 10 and bumping RAM to 8GB.

Engineering Manager in a Fully Remote Engineering Organization

Being an Engineering Manager in a fully remote org — tools, 1on1 prep, and attendance conventions.

AWS CLI Commands for Bulk Uploading Files to S3

`aws s3 cp` / `sync` commands for bulk-uploading files to S3, with --include / --exclude and --dryrun tips.

Recommended Articles for Understanding Cookies and Sessions

Recommended reading list for beginner web engineers to understand Cookies, Sessions, and IPA's session countermeasures series.

[Mongoose] How to Fix Error: Unable to invalidate a subdocument that has not been added to an array.

The 'unable to invalidate a subdocument' Mongoose error explained via a bad type: ObjectId value.

[Git] How to Fix error: cannot lock ref 'refs/remotes/origin/xxx': 'refs/remotes/origin/xxx/yyy' exists;

Resolving the git fetch cannot lock ref error by pruning stale remote refs with git remote prune origin.

Redis Replication (Master-Slave) Environment Setup [docker-compose Edition]

Setting up and verifying a Redis master-slave replication environment with docker-compose.

Determining Country, City, Postal Code, and ASN from IP Address [GeoIP2 + Node.js]

Node.js samples for looking up country, city, postal code, and ASN from an IP with GeoIP2.

[Linux] Command to Delete Old Files by Specifying Date and Time

Use find with -mtime / -atime and xargs rm to bulk delete old files on Linux when freeing up disk space.

[Linux] Command to Check Directories with High Disk Usage

Combine du and sort to find the top directories eating disk space on Linux when hit with a disk full warning.

How to Deploy an Existing Express.js Project to Heroku

Adding a Procfile to an existing Express.js app and deploying it to Heroku.

[JavaScript] Use unicode-substring for Extracting Parts of Strings Containing Unicode

Why substring breaks surrogate pairs — and how the unicode-substring package slices Unicode strings safely.

[JavaScript] Detecting Hyphens and Dashes with Regular Expressions Using unicode-regex + Dash_Punctuation

Detect the many kinds of hyphen and dash characters at once by combining unicode-regex with the Dash_Punctuation category.

[Express.js] Timeout Configuration Changes and Sample Code for Testing

Express.js default timeout, plus sample code for server / request / response setTimeout behavior.

JavaScript Function Currying Sample Code

Currying samples that let you call add(2)(3)(4).result(), written in both ES5 and ES6 styles.

[Linux/macOS] Batch Compress Files to .gz with gzip Command

Use gzip * to batch compress log files and free up disk space when hit with a sudden disk full incident.

Achieve Comfortable Video Calls with Noise Cancelling App Krisp

Using the Krisp noise-cancelling app to keep remote video calls clear from background noise.

[WordPress] Fixed Email Sending Issue with WP Mail SMTP Version 1.7.0

How I fixed WP Mail SMTP 1.7.0 by swapping the From Email and From Name fields back to their correct values.

Differences Between JavaScript Functions and Methods

The difference between JavaScript functions and methods, framed around MDN, CodeZine, and how this is bound.