Confirm current database connection in Rails console

So I have this ~/.aliases file in my home directory that contain all of my aliases. However, everytime I open the file I have to do :set filetype=bash to make Vim syntax highlight my file … until today! After a quick Googling for “vim magic comment”, I found this amazing tips: Modeline magic Tip 331 Printable Monobook Previous Next created 2002 · complexity basic · version 6.0 Options set in your vimrc will…vim.fandom.com

You may have written a Ruby method which pass all the arguments to the underlying method. For example: def self.run(*args, &block) new.run(*args, &block) end With the addition of keyword arguments in Ruby 2.0, things have gotten a bit crazier since you may want to pass all the keyword arguments to…

TL;DR: hash[:key] || "value" is still faster than #fetch to set default key in Ruby 2.6. >> RUBY_VERSION => "2.6.2" >> require "benchmark/ips" => true >> Benchmark.ips do |x| ?> x.report("fetch") { {}.fetch(:non_existance, true) } >> x.report("[] ||") { {}[:non_existance] || true } >> end; nil Warming up -------------------------------------- fetch 365.027k i/100ms [] || 364.225k i/100ms Calculating ------------------------------------- fetch 11.944M (± 5.1%) i/s - 59.864M in 5.025510s [] || 12.743M (± 5.8%) i/s - 63.739M in 5.020041s => nil

A few years back, Rails 4.1.0 introducedraise_on_missing_translations flag for Action View. Setting this key to true in your environment configuration will make Rails raises exception if you have a missing translation keys: # In config/environments/test.rb (and development.rb) config.action_view.raise_on_missing_translations = true However, one thing that people may have missed is that this configuration only applies to Rails views. If you call I18n.translate or I18n.t directly from your specs, or when you build a JSON output, Rails won’t raise any exception at all.

As of Ruby 2.5.1, double splat operator (**options, for example) is still considerably slower than accepting a normal argument and sets a default to empty hash. Here’s a simple benchmark: require "benchmark/ips" def option_hash(options = {}); end def double_splat(**options); end Benchmark.ips do |x| x.report("option_hash") { option_hash(foo: 1, bar: 2) } x.report("double_splat")…

This one is a simple quality-of-life improvement. Added time helper method `freeze_time` which is an alias for `travel_to Time.now` by… r? @dhhgithub.com So, in Rails 5.2, instead of you doing: travel_to(Time.current) do # ... end You can actually use this new freeze_time helper: freeze_time do # ... end Internally, both of these methods are just mocking Time.current or Time.now to return given time, essentially “freezing the time”. I’m never a fan of travel_to(current_time) as I feel that it reads weird. I’m going to just use freeze_time from now on if the situation allows.

In Rails 6.0, rails routes command will support --expanded (or -x, the shorthand version). This is similar to \x mode in psql where it will print the record in detailed list instead of in a table. $ rails routes --expanded --[ Route 1 ]------------------------------------------------------- Prefix…

Back in 2012, Rails 3.2.0 added a .pluck method which you can call on a ActiveRecord::Relation or a model class: > User.pluck(:id) #=> [1, 2, 3] But what if you need just the first value from the result? You will probably have to use .limit and #first: > User.limit(1).pluck(:id).first …