Fueling Curiosity, One Insight at a Time

Array.from() takes a second argument which is a map. Example: Array.from(Array(10), (element, index) => //some logic to fill the array)

this seems a pretty cool library http://shrinerb.com/

Rails console does lazy connection to database and this behaviour can be changed with by adding ActiveRecord::Base.connection to console config block.

"localization" referred as "l10n", and "internationalization" referred as "i18n". cause,
l10n => "l" in between 10chars(o, c, a, l, i, z, a, t, i, o) and then "n"
i18n => "i" in between 18chars and then "n"
Also Globalization (g11n), Localizability (l12y).
I didnt knew, never noticed, and I feel stupid now :P

[...Array(100).keys()] will return a range from 0 to 100

long read on load balancing https://blog.envoyproxy.io/introduction-to-modern-network-load-balancing-and-proxying-a57f6ff80236

more info on proxy javascript objects here https://docs.microsoft.com/en-us/scripting/javascript/reference/proxy-object-javascript

in es6 you can now proxy your object's operation like get, set etc. All you need to do it create a proxy on a object like const proxyObj = new Proxy(initialObj, handler) the initial object is the object that you want to create proxy for and handler object is the place where you override object's method like get and set.

about ActiveSupport::Notifications there is a railscasts on it http://railscasts.com/episodes/249-notifications-in-rails-3

In javascript generally if you reduce an array it starts from 0th element and goes till the end but if you want to run the reduce from right to left of an array i.e. start from last element and go till the first element use arr.reduceRight