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chair — Tue, 16 Sep 2025 23:32:00 +0000

Why Whisper Failed and How Waku is Building the Future of Web3 Communication - DEV Community

Blockchain technology is powerful, but it doesn’t inherently guarantee privacy. It offers...

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Common Gatsby Plugins Configuration Cheatsheet

chair — Mon, 09 Aug 2021 01:27:26 +0000

Follow the checklist, run the commands and update the gatsby-config.js file with the corresponding plugin data.

Gatsby Docs

Plugins Checklist

gatsby-background-image

yarn add gatsby-background-image

plugins: [`gatsby-transformer-sharp`, `gatsby-plugin-sharp`]

gbimage-bridge

yarn add gbimage-bridge

relies on dependencies from gatsby-background-image, no plugins

https://www.gatsbyjs.com/docs/how-to/styling/bulma/

yarn add bulma sass gatsby-plugin-sass

plugins: [`gatsby-plugin-sass`],

gatsby-plugin-react-helmet

npm install gatsby-plugin-react-helmet react-helmet

plugins: [`gatsby-plugin-react-helmet`]

gatsby-source-filesystem

npm install gatsby-source-filesystem

plugins: [
    // You can have multiple instances of this plugin
    // to read source nodes from different locations on your
    // filesystem.
    //
    // The following sets up the Jekyll pattern of having a
    // "pages" directory for Markdown files and a "data" directory
    // for `.json`, `.yaml`, `.csv`.
    {
      resolve: `gatsby-source-filesystem`,
      options: {
        name: `pages`,
        path: `${__dirname}/src/pages/`,
      },
    },
    {
      resolve: `gatsby-source-filesystem`,
      options: {
        name: `data`,
        path: `${__dirname}/src/data/`,
        ignore: [`**/\.*`], // ignore files starting with a dot
      },
    },
  ],

gatsby-transformer-sharp

npm install gatsby-transformer-sharp gatsby-plugin-sharp

plugins: [`gatsby-plugin-sharp`, `gatsby-transformer-sharp`],

gatsby-plugin-sass

npm install sass gatsby-plugin-sass

plugins: [`gatsby-plugin-sass`]

[ ] gatsby-plugin-web-font-loader

yarn add gatsby-plugin-web-font-loader

plugins: [
    {
      resolve: 'gatsby-plugin-web-font-loader',
      options: {
        google: {
          families: ['Droid Sans', 'Droid Serif']
        }
      }
    }
  ]

gatsby-plugin-gdpr-cookies

yarn add gatsby-plugin-gdpr-cookies or npm install --save gatsby-plugin-gdpr-cookies

plugins: [
    {
      resolve: `gatsby-plugin-gdpr-cookies`,
      options: {
        googleAnalytics: {
          trackingId: 'YOUR_GOOGLE_ANALYTICS_TRACKING_ID', // leave empty if you want to disable the tracker
          cookieName: 'gatsby-gdpr-google-analytics', // default
          anonymize: true, // default
          allowAdFeatures: false // default
        },
        googleTagManager: {
          trackingId: 'YOUR_GOOGLE_TAG_MANAGER_TRACKING_ID', // leave empty if you want to disable the tracker
          cookieName: 'gatsby-gdpr-google-tagmanager', // default
          dataLayerName: 'dataLayer', // default
        },
        facebookPixel: {
          pixelId: 'YOUR_FACEBOOK_PIXEL_ID', // leave empty if you want to disable the tracker
          cookieName: 'gatsby-gdpr-facebook-pixel', // default
        },
        tikTokPixel: {
          pixelId: 'YOUR_TIKTOK_PIXEL_ID', // leave empty if you want to disable the tracker
          cookieName: 'gatsby-gdpr-tiktok-pixel', // default
        },
        hotjar: {
          hjid: 'YOUR_HOTJAR_ID',
          hjsv: 'YOUR_HOTJAR_SNIPPET_VERSION',
          cookieName: 'gatsby-gdpr-hotjar', // default
        },
        // defines the environments where the tracking should be available  - default is ["production"]
        environments: ['production', 'development']
      },
    },
  ],

gatsby-plugin-manifest

npm install gatsby-plugin-manifest

plugins: [
    {
      resolve: `gatsby-plugin-manifest`,
      options: {
        name: `GatsbyJS`,
        short_name: `GatsbyJS`,
        start_url: `/`,
        background_color: `#f7f0eb`,
        theme_color: `#a2466c`,
        display: `standalone`,
      },
    },
  ],

gatsby-plugin-alias-imports

yarn add gatsby-plugin-alias-imports


plugins: [
    {
      resolve: `gatsby-plugin-alias-imports`,
      options: {
        alias: {},
        extensions: []
      }
    }
  ]

Ruby Descending Order Method

chair — Tue, 11 Aug 2020 04:23:19 +0000

Method takes a non-negative integer (n) as an argument then:

turns it into a string
splits each character in the string into an array of strings
sorts the array alphabetically
joins the strings together in ascending order
reverses the string and turns it back into an integer

Let me know if you found a better way!

def descending_order(n)
  n.to_s.split("").sort_by {|x| x}.join("").reverse.to_i
end

Screen commands

chair — Sun, 31 May 2020 00:26:53 +0000

Screen is useful for running long scripts on linux virtual machines where you don't want to risk termination due to a disconnection.

The following commands are all you will ever need, probably. Most of the time.

download: sudo yum install screen
list sessions: screen -ls
start session: screen
detach from session: ctrl a + d
re-attach: if there is only one session running you can do screen -r else do screen -ls and get the desired session id and do screen -r <SESSION_ID>
kill session from inside the session: ctrl a + k + y
enable vertical scrolling: ctrl a + ESC

A lovely cheatsheet I forked from someone wiser than I, who also forked it from someone before them:
https://gist.github.com/aarobender/a503231e83b862c3757ab6527bdfc812

Ruby progressbar template

chair — Tue, 28 Apr 2020 17:32:00 +0000

Use this template for your progressbar needs in ruby. Highly modifiable, always useful, easy to forget. The Ruby progressbar is...a tool you can use.

Up top in your file, require the ruby-progressbar gem
Construct a query worth tracking the progress of
Use the progressbar template below
Enjoy peace of mind knowing exactly how long your process will take
Modify the code below to fit your use case

require 'ruby-progressbar'

query = Person.where.not(last_name: "Bigalow")

progress = ProgressBar.create(
  total: query.count,
  format: "Progress: %a <%B> %p%% %t",
  smoothing: 0.5
)

query.find_each do |person|
 progress.increment

 person.update!(first_name: "Duece")
end

Git flow multiple hotfix branches

chair — Tue, 21 Apr 2020 12:49:10 +0000

Adjust your git config to allow for multiple concurrent hotfix branches.

git config gitflow.multi-hotfix true
git config --get gitflow.multi-hotfix

You don't have to rename that second hotfix branch to slowfix before pushing ever again.

Translate rails query to raw sql in rails console

chair — Mon, 20 Apr 2020 12:48:35 +0000

Gone are the days of wondering what the sql equivalent of your rails query might be!

In the rails console first run:

ActiveRecord::Base.logger = Logger.new(STDOUT)

Then run:

ActiveRecord::Base.connection.instance_variable_set :@logger, Logger.new(STDOUT)

Thats it! Thats all!

Have fun be safe.

Find large files on Linux OS

chair — Sat, 04 Apr 2020 21:50:22 +0000

If you work with Linux VM's, you know it can be a pain to find some deeply hidden large files sucking away at your storage. Fear not, use du.

sudo du -shx /* | sort -h

It will return something like:

...
4K  /opt
72K /root
764K    /run
29M /etc
39M /boot
256M    /home
889M    /usr
33G /var

Looks like our /var folder could use some further inspection, lets adjust our command:

sudo du -shx /var/* | sort -h

Then we see something like:

...
60K /var/spool
224M    /var/cache
6.2G    /var/log
27G /var/lib

It appears we have two more directories worthy of further digging.

We can adjust our command again to inspect /var/lib/* or /var/log/* respectively.

Good luck!

CSV on Rails

chair — Mon, 16 Mar 2020 02:00:39 +0000

Video Guide on YouTube

Using csv's you can quickly jumpstart your rails app with mock data and help you hit the ground running in your development process.

This post will teach you how to:

Spin up a new rails app with postgresql database.
Create a mock data csv with help from our friends at mockaroo https://mockaroo.com/ we'll be using car makes and models for this demo.
Create database records from our mock data in our rails app using the ruby CSV class.
Export specific database objects to CSV.

Resource Links:

Mockaroo

New rails app

Ruby CSV Class

Lets get going!

First lets spin up our new rails app:
rails new my_car_app --database=postgresql

cd into your app's directpry and run bundle to ensure all our gems are loaded:
bundle

Next lets scaffold a new car model with all the accouterments:
rails generate scaffold Car make:string model:string model_year:integer factory_id:string

Setup and migrate your database:
rails db:setup
then
rails db:migrate

Hop into the rails console, from the home directory of your app run:
rails console

Run a count on the car model to prove there are indeed, 0 cars:
Car.count

Lets create a car using the "create" method defined in our cars controller:
Car.create!

Awesome! We have a car. It is a bit bland though, not much data to be had apart from nil values for the interesting bits.

This is where mockaroo helps us out! Hope over to https://mockaroo.com and create the fields like so:

Place the mock data csv file with the mock data in the app/tmp/ directory.

Now lets create a new file in your app's home directory named create_cars.rb.

require 'csv'

CSV.foreach("tmp/car_mock_data.csv") do |row|
    Car.create!(
        make: row[0],
        model: row[1],
        model_year: row[2],
        factory_id: row[3]
    )
end

We are now prepared to create 1000 new cars! In your bash terminal from your app's home directory run:
rails r create_cars.rb

Hop back into your rails console:
rails c

Confirm we we have 1001 cars now:
Car.count

Now, lets say we would like to create a csv containing only Japanese made car models?

Lets create another file in our app's home directory, called japanese_cars.rb.

require 'csv'

japanese_car_makes = [
  "Toyota",
  "Suzuki",
  "Nissan",
  "Infiniti",
  "Mazda",
  "Lexus",
  "Mitsubishi",
  "Isuzu",
  "Subaru",
  "Acura",
  "Honda",
  "Scion",
];

path = 'tmp/japanese_cars.csv';

CSV.open(path, "wb") do |csv|
  # headers
  csv << ["Make", "Model", "Year", "Facory ID"]

  Car.where(make: japanese_car_makes).find_each do |car|
    begin
      # data rows
      csv << [car.make, car.model, car.model_year, car.factory_id]

    rescue Exception => e
      puts Rails.backtrace_cleaner.clean(e.backtrace)
    end
  end
end

Up top we require the ruby csv class.
Declare an array of Japanese car model names
Set a path variable for your csv
Begin the csv loop
Loop thru cars where the make matches one of the japanese_car_makes indexes.
Set the headers
Fill in the data rows
Handle errors gracefully

And voila! We've covered quite a bit in such a short and easy exercise!

The ruby csv class
Spin up a new rails app
Scaffold a new model, and all accouterments
Create database entries from a csv file
Create a csv file from specific database entries

Good luck, have fun!

Ruby CSV Template

chair — Sun, 15 Mar 2020 20:37:57 +0000

I refer to this #ruby #csv template at least once a week in my day job. I hope this will also become useful for you!

This template simply loops thru an assumptive group of users in a database. The template can be easily modified for your own use.

Simply modify the desired file path, the objects you would like to loop thru, and execute the following command from the the root directory of your rails app: rails r <name_of_template>

require 'csv'

path = 'file_path.csv';
users = User.order(created_at: :desc);

CSV.open(path, "wb") do |csv|
  # headers
  csv << ['First Name', 'Last Name', 'Date of Birth'];

  # loop thru users
  users.each do |u|
    csv << [u.first_name, u.last_name, u.date_of_birth];
  end  
end

New rails 6 app with postgresql database and heroku deployment

chair — Sun, 01 Dec 2019 23:40:06 +0000

I have been working with rails professionally for over a year now, and I want to share the guide I use personally to quickly spin up a new rails app with a postgresql database, and deploy to heroku.

My aim is to make it quick and easy for you to get going, and take the fuzziness out of the setup process.

Find my gist here!
https://gist.github.com/chair28980/acaa7c8f8a71dc663194ce79c44d00b9

I'd love to hear your feedback. Drop a comment here or find me on twitter: @vrycmfy

Restart all running docker containers

chair — Fri, 29 Nov 2019 20:13:49 +0000

Save yourself the hassle of restarting your containers individually.

First see which containers are currently running:
docker ps

To restart an individual container you can run:
docker restart <container id>

It can be useful to feed the output of a docker command into another to save the effort and time of running the above, if you know you want to restart all the containers.

Restart all running containers:
docker restart $(docker ps -q)

Happy dockering!