Beautiful Ruby code formatting Florent Guilleux, RubyPerú October 2012 PDF: http://goo.gl/MxECI 

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Code formatting is important. It is too important to ignore and it is too important to treat religiously. Code formatting is about communication, and communication is the professional developer’s first order of business. Clean Code, Robert Martin 

Los gustos no se discuten pero sí se cultivan. Adrienne Maillet 

layout_was = @default_layout @default_layout = false template = compile_template(engine, data, options, views) output = template.render(scope, locals, &block) 

layout_was = @default_layout @default_layout = false template = compile_template(engine, data, options, views) output = template.render(scope, locals, &block) layout_was = @default_layout @default_layout = false template = compile_template(engine, data, options, views) output = template.render(scope, locals, &block) from Sinatra 

unless valid_month?(@start_month) && valid_start_year?(@start_year) || valid_issue_number?(@issue_number) errors.add :start_month, "is invalid" unless valid_month?(@start_month) errors.add :start_year, "is invalid" unless valid_start_year?(@start_year) errors.add :issue_number, "cannot be empty" unless valid_issue_number?(@issue_number) 

unless valid_month?(@start_month) && valid_start_year?(@start_year) || valid_issue_number?(@issue_number) errors.add :start_month, "is invalid" unless valid_month?(@start_month) errors.add :start_year, "is invalid" unless valid_start_year?(@start_year) errors.add :issue_number, "cannot be empty" unless valid_issue_number?(@issue_number) unless valid_month?(@start_month) && valid_start_year?(@start_year) || valid_issue_number?(@issue_number) errors.add :start_month, "is invalid" unless valid_month?(@start_month) errors.add :start_year, "is invalid" unless valid_start_year?(@start_year) errors.add :issue_number, "cannot be empty" unless valid_issue_number?(@issue_number) from active_merchant 

def map_to_table(table_name) features << Relation.new(:name => table_name, :db => BrokenRecord.database, :record_class => self) end 

def map_to_table(table_name) features << Relation.new(:name => table_name, :db => BrokenRecord.database, :record_class => self) end def map_to_table(table_name) features << Relation.new(:name => table_name, :db => BrokenRecord.database, :record_class => self) end from broken_record 

def to_liquid self.data.deep_merge({ "url" => self.url, "date" => self.date, "id" => self.id, "categories" => self.categories, "next" => self.next, "previous" => self.previous, "tags" => self.tags, "content" => self.content }) end from Jekyll 

@regions.select { |r| distance >= r[:minimum_distance] }.max_by { |r| r[:minimum_distance] }.fetch(:label) 

@regions.select { |r| distance >= r[:minimum_distance] }.max_by { |r| r[:minimum_distance] }.fetch(:label) @regions.select { |r| distance >= r[:minimum_distance] } .max_by { |r| r[:minimum_distance] } .fetch(:label) from blind 

regexp = /start\s(group)(?:alt1|alt2)end/ 

regexp = %r{ start # some text \s # white space char (group) # first group (?:alt1|alt2) # some alternation end }x from Ruby Style Guide regexp = /start\s(group)(?:alt1|alt2)end/ 

A final exercise • take an existing piece of your code and try to make it beautiful • publish the gist! 

The happy programmer