Ruby 2.5 adds Exception#full_message method
Before Ruby 2.5, if we want to log a caught exception, we would need to formatit ourselves. class AverageService attr_reader :numbers, :coerced_numbers def initialize(numbers) @numbers = numbers @coerced_numbers = coerce_numbers end def average sum / count end private def coerce_numbers numbers.map do |number| begin Float(number) rescue Exception => exception puts "#{exception.message} (#{exceptio
Ruby 2.5 allows creating structs with keyword arguments
In Ruby, structs can be created using positional arguments. Customer = Struct.new(:name, :email)Customer.new("John", "john@example.com")This approach works when the arguments list is short. When arguments listincreases 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 arenot what we wanted. Customer.new(nam
Ruby 2.5 enumerable predicates accept pattern argument | BigBinary Blog
Ruby 2.5.0 was recentlyreleased. Ruby has sequence predicates such as all?, none?, one? and any? whichtake a block and evaluate that by passing every element of the sequence to it. if queries.any? { |sql| /LEFT OUTER JOIN/i =~ sql }logger.log "Left outer join detected"endRuby 2.5 allows using a shorthand for this bypassing a pattern argument.Internally case equality operator(===) is used against e
Ruby 2.5 added yield_self | BigBinary Blog
Ruby 2.5 added a new method namedyield_self. It yields the receiver tothe given block and returns output of the last statement in the block. irb> "Hello".yield_self { |str| str + " World" } => "Hello World"How is it different from try in Rails ?Without a method argument trybehaves similar to yield_self. It would yield to the given block unless thereceiver is nil and returns the output of the last
Graceful shutdown of Sidekiq processes on Kubernetes
In our last blog, we explained how to handlerolling deployments of Rails applications with no downtime. In this article we will walk you throughhow to handle graceful shutdown of processes in Kubernetes. This post assumes that you have basic understanding ofKubernetesterms likepodsanddeployments. ProblemWhen we deploy Rails applications on kubernetesit stops existing pods and spins up new ones.Whe
New arguments support for float & integer modifiers
In Ruby, there are many methods available which help us to modify a float orinteger value. Ruby 2.3.xIn the previous versions of Ruby, we could use methods such as floor, ceiland truncate in following ways. 5.54.floor #=> 55.54.ceil #=> 65.54.truncate #=> 5Providing an argument to these methods would result in ArgumentErrorexception. Ruby 2.4Ruby community decided to come up with an option toadd p
Ruby 2.4 adds Enumerable#uniq & Enumerable::Lazy#uniq
In Ruby, we commonly use uniq method on an array to fetch the collection ofall unique elements. But there may be cases where we might need elements in ahash by virtue of uniqueness of its values. Let's consider an example of countries that have hosted the Olympics. We onlywant to know when was the first time a country hosted it. # given object{ 1896 => 'Athens', 1900 => 'Paris', 1904 => 'Chicago',
Ruby 2.4 unifies Fixnum and Bignum into Integer
Ruby uses Fixnum class for representing small numbers and Bignum class forbig numbers. # Before Ruby 2.41.class #=> Fixnum(2 ** 62).class #=> BignumIn general routine work we don't have to worry about whether the number we aredealing with is Bignum or Fixnum. It's just an implementation detail. Interestingly, Ruby also has Integer class which is superclass for Fixnumand Bignum. Starting with Ruby
New liberal_parsing option for parsing bad CSV data
Comma-Separated Values (CSV) is a widely used data format and almost everylanguage has a module to parse it. In Ruby, we haveCSV class to dothat. According to RFC 4180, we cannothave unescaped double quotes in CSV input since such data can't be parsed. We get MalformedCSVError error when the CSV data does not conform to RFC 4180. Ruby 2.4 has added aliberal parsing option to parse suchbad data. Wh
Ruby 2.4 implements Enumerable#sum
It is a common use case to calculate sum of the elements of an array or valuesfrom a hash. [1, 2, 3, 4] => 10{a: 1, b: 6, c: -3} => 4Active Support already implementsEnumerable#sum > [1, 2, 3, 4].sum #=> 10> {a: 1, b: 6, c: -3}.sum{ |k, v| v**2 } #=> 46> ['foo', 'bar'].sum # concatenation of strings #=> "foobar"> [[1], ['abc'], [6, 'qwe']].sum # concatenation of arrays #=> [1, "abc", 6, "qwe"]Unti
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Ruby 2.5 allows rescue/else/ensure inside do/end blocks
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