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@kon_yu profile picture

@kon_yu

I am a freelance software engineer, media artist, technical advisor, CTO of a freelance guild, and have a cat. Shoul you have any plan to work with me, please contact me via dev.to message!

Education

Master degree of Computer science

Work status

I'm looking for work!

How to Get mp3 file's Durations with Python

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How to create a string of numbers with ¥, $, €, or £ in JavaScript.

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Using JavaScript to determine whether the client is iOS or Android

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Let's organize how to write asynchronous processing using arrow functions and async/await

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How to Solve a AWS Lambda error - Runtime.ImportModuleError: Error: Cannot find module 'jmespath'

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How to do not apply basic authentication to certain URLs in a Rails project with basic authentication method

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Rake to flush out and delete unused image files in Rails

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How to use (almost) all the functions of Enumerable modules: select, inject, take, and so forth

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Why Ruby Random object not to need a seed number

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Installing the latest version of Ruby on Raspberry pi

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How to register DockerImage to DockerHub

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How to check the connection between mysql and memcached in php

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How to add a package not found by apt-get(debian, ubuntu both)

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Autoprefixer Rails autoprefixer-rails

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How to run multiple bash commands in CMD and docker-compose.yml of Dockerfile

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Daily backup of production staging using a Docker container for Heroku maintenance that can be deployed to Heroku

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How to use Hubot with Slack to build, debug, and deploy to Heroku in a local environment

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Using select2 in ActiveAdmin by using activeadmin_addons

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How to change the table used in DelayedJob

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How to terminate Vim / Vi

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How to realize caching in Ruby classes

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Performance comparison between SQL cache and variables in Rails, 7000 times difference

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How to install jupyter notebook on Ubuntu 16.04

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Get the list of classes connected to the DB

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Explore files under a specific directory in Rails

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Get the list of attributes and columns of the inheritance class of ActiveRecord

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How to check if a particular method exists in a Ruby class and instance

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Convenient because updated_at does not update without changing the attributes of ActiveRecord and does not issue any extra SQL.

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Determine if a particular validation error is occurring in AcitiveRecord

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How to use Artillery for load testing with different input values

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Why you shouldn't use current time to refine a batch run

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Building AWS SAM environment and running Lambda with Ruby

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Deploying with AWS SAM Running Lambda in Ruby

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Organizing the behavior of even and odd in :nth-child

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How to handle Enum in ActiveRecord

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Error handling in begin rescue verifies that errors encountered during rescue can be rescued.

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How to check the operation of Gatsby on a smartphone or other device that is under development in a local network

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How to encode/decode base64 with JS

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Checking the user information that is being accessed by AWS-CLI

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How to copy the path of the current directory to the clipboard (mac)

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Output TouchDesinger's output to webcam for mac

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Make the default of a variable of type Metabase date relative

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