Ruby 2.5 allows creating structs with keyword arguments
In Ruby, structs can be created using positional arguments. 1Customer = Struct.new(:name, :email) 2Customer.new("John", "john@example.com")Copy This approach works when the arguments list is short. When arguments list increases then it gets harder to track which position maps to which value. Here if we pass keyword argument then we won't get any error. But the values are not what we wanted. 1Custo
Ruby 2.5 enumerable predicates accept pattern argument | BigBinary Blog
Ruby 2.5.0 was recently released. Ruby has sequence predicates such as all?, none?, one? and any? which take a block and evaluate that by passing every element of the sequence to it. 1if queries.any? { |sql| /LEFT OUTER JOIN/i =~ sql } 2logger.log "Left outer join detected" 3endCopy Ruby 2.5 allows using a shorthand for this by passing a pattern argument. Internally case equality operator(===) is
Rails 5.1 has introduced Date#all_day helper
Sometimes, we want to query records over the whole day for a given date. 1>> User.where(created_at: Date.today.beginning_of_day..Date.today.end_of_day) 2 3=> SELECT "users".* FROM "users" WHERE ("users"."created_at" BETWEEN $1 AND $2) [["created_at", 2017-04-09 00:00:00 UTC], ["created_at", 2017-04-09 23:59:59 UTC]]Copy 1>> User.where(created_at: Date.today.all_day) 2 3=> SELECT "users".* FROM "us
Ruby 2.4 unifies Fixnum and Bignum into Integer
Ruby uses Fixnum class for representing small numbers and Bignum class for big numbers. 1# Before Ruby 2.4 2 31.class #=> Fixnum 4(2 ** 62).class #=> BignumCopy In general routine work we don't have to worry about whether the number we are dealing with is Bignum or Fixnum. It's just an implementation detail. Interestingly, Ruby also has Integer class which is superclass for Fixnum and Bignum. Star
Hash#compact and Hash#compact! now part of Ruby 2.4
1hash = { "name" => "prathamesh", "email" => nil} 2hash.compact #=> { "name" => "prathamesh" } 3hash #=> { "name" => "prathamesh", "email" => nil} 4 5hash.compact! #=> { "name" => "prathamesh" } 6hash #=> { "name" => "prathamesh" }Copy Now, Ruby 2.4 will have these 2 methods in the language itself, so even those not using Rails or Active Support will be able to use them. Additionally it will also
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Secrets of Testing Rails 5 Apps - RedDotRubyConf 2016
ApplicationRecord in Rails 5
