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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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4 min read

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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3 min read

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

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4 min read

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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