Fueling Curiosity, One Insight at a Time

Use AbortController to cancel the promise.
/code
const controller = new AbortController();
const signal = controller.signal;
// pass this signal as option in your fetch request
fetch(url, {signal}).then(...).catch(...)

// now you can reject the above promise by calling abort like this
signal.abort()

//promise will get rejected with error "AbortError"

preloading data for custom sql,
profiles = Profile.find_by_sql(sql_query)
ActiveRecord::Associations::Preloader.new.preload(profiles, :user)

Some more stuff here http://cha1tanya.com/2013/10/26/preload-associations-with-find-by-sql.html

rendering templates outside of controller "SomeController.render :index, formats: :csv, locals: { users: users }"

We can specify integrity and crossorigin on link and script tags. More here https://hacks.mozilla.org/2015/09/subresource-integrity-in-firefox-43/

https://developer.mozilla.org/en-US/docs/Web/HTML/Global_attributes/hidden Looks like this attribute can be used to preload content, or am I wrong?

a sample/template rspec spec to test concurrent api calls. https://gist.github.com/goromlagche/835bd371d5e4825580e8c9e4430c7ea2

Never Wrap a component with HOC inside the render method. This will cause numerous unmount and mount of same component on each render.

Vim tip - Hitting g Ctrl-g will show you some tech info about the current file, like number of words or how many bytes it has
-- Col 1 of 25; Line 184 of 184; Word 471 of 472; Byte 4266 of 4291

In ssh url git@github.com:code-mancers/engineering-blog.git git is the user on github.com server. Even ssh://code-mancers@github.com/engineering-blog.git is a valid git url since git tries to clone it but since there is no code-mancers user on github hence git is not able to clone it.

You can use https://www.fullstory.com to record user sessions and play back interactions. UX designers use this tool to understand how to improve their design.