TIL in Flutter we can do "flutter pub deps" to list all dependencies used in a nice format.
TIL how to check index creation progress in postgres
SELECT (blocks_done::numeric / blocks_total::numeric) * 100 AS percentage_done FROM pg_stat_progress_create_index;
Got this from Stackoverflow: https://stackoverflow.com/a/78640729
Yes, it's from the good old stackoverflow :)
TIL about Streaming and Server Sent Event
Streaming
class MyController < ActionController::Base include ActionController::Live def stream response.headers['Content-Type'] = 'text/event-stream' 100.times { response.stream.write "hello world\n" sleep 1 } ensure response.stream.close end end
Server Sent Events
class MyController < ActionController::Base include ActionController::Live def index response.headers['Content-Type'] = 'text/event-stream' sse = SSE.new(response.stream, retry: 300, event: "event-name") sse.write({ name: 'John'}) sse.write({ name: 'John'}, id: 10) sse.write({ name: 'John'}, id: 10, event: "other-event") sse.write({ name: 'John'}, id: 10, event: "other-event", retry: 500) ensure sse.close end end
https://developer.mozilla.org/en-US/docs/Web/API/EventSource
TIL in rails: `Time.current.all_month` to get the whole range
https://api.rubyonrails.org/classes/DateAndTime/Calculations.html#method-i-all_month
Ruby double equal in views <%== pagy_info(@pagy) %>
Here is what I found:
- <% %>: Executes the Ruby code within the brackets but does not print the result to the template.
- <%= %>: Executes the Ruby code and prints the result to the template, with HTML escaping.
- <%== %>: Executes the Ruby code and prints the result to the template without HTML escaping.
So, in an example that prompted me to search, pagy_info(@pagy) is being called to generate pagination information, and the == ensures that the HTML generated by pagy_info is rendered as-is in the view, allowing for proper display of pagination links or information without escaping the HTML tags.
"be", "eq" and "eql", "equal" are different in rspec
TIL we can do `array1 | array 2` to merge them and get unique ones
irb(main):001> ["a", "b"] | ["b", "c"] => ["a", "b", "c"]
TIL in Rails: How to change column defaults with :from and :to option for making it a reversible migration
def change change_column_default :blog, :language, "en_US" end
and it gave this error when I try to rollback the migration
Caused by: ActiveRecord::IrreversibleMigration: change_column_default is only reversible if given a :from and :to optio
SOLUTION:
def change change_column_default :blog, :language, from: "en", to: "en_US" end
TIL in rails: `Model.none` returns a chainable relation with zero records
TIL about unaccent (PostgreSQL extension)
SQL unaccent is a PostgreSQL extension that removes accents (diacritic signs) from lexemes. It is a filtering dictionary that can be used to improve user experience and implement search in a user-friendly way. The unaccent() function removes accents from a given string and can be used outside normal text search contexts. For example, SELECT unaccent('unaccent', 'Hôtel') returns 'hotel'. The unaccent extension provides a single function, unaccent(), which can be used to remove accents from words. It can even be indexed using an unaccent-based index to speed up the process.
TIL Variable hoisting in ruby
I might be still continue declaring explicity as it gives more clarity to me but still good to know about hoisting in ruby :)
You can read more here: https://ieftimov.com/posts/variable-hoisting-ruby/
TIL about 'bin/rails runner' in Rails
TIL in Ruby: `arity`
Returns the number of mandatory arguments.
If the block is declared to take no arguments, returns 0.
If the block is known to take exactly n arguments, returns n.
If the block has optional arguments, returns -n-1
[Ruby][Rails] Learned about a new gem decent_exposure
TIL about PostgreSQL follower database in Heroku
TIL in Flutter, we can specify the app version and build number in pubspec.yaml
TIL in Javascript, Date `getMonth()` does not give the correct month as we expect 🤯
today = new Date() Thu May 05 2022 19:28:34 GMT+0530 (India Standard Time) today.getMonth() 4
what! it should be 5 (May!)
looks like the return values are from 0 to 11
so for now we'll have to do today.getMonth() + 1 to get correct month value
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/getMonth#return_value
TIL we can compare versions in Ruby using `Gem::Version` without any gems
Gem::Version.new('1.0.1') > Gem::Version.new('1.0.0')
Here is the link to the documentation: https://ruby-doc.org/stdlib-3.1.0/libdoc/rubygems/rdoc/Gem/Version.html
TIL How to change screenshot directory in macOS
defaults write com.apple.screencapture location {location here}
e.g,
defaults write com.apple.screencapture location /Users/rinas/Desktop/Screenshots
TIL in Rails: Code after redirect_to gets executed
redirect_to url and return
Here is the issue which talks about this: https://github.com/rails/rails/issues/26363
TIL about using counter_cache in rails to save association's count in parent model
Here is the SO answer that helped: https://stackoverflow.com/a/16996960/3098242
TIL how to select values from one column without `nil` in Rails
Page.where.not(custom_domain: nil).pluck(:custom_domain)
---------------------------------------
Page.pluck(:custom_domain)
`.pluck` picks values but includes `nil` as well. So we can use `.compact`
Page.pluck(:custom_domain).compact
TIL How to change progress bar colour in Rails
TIL what policy to use for AWS S3 to work with Rails Active Storage
TIL how to colour console logs
console.log('%c hey red text', 'color: red') console.log('%c hey green text', 'color: green')