ganmacs

hash = [{id: 1, name: 'taro', old: 22, sex: 'men'},
        {id: 2, name: 'hanako', old: 22, sex: 'woman'},
        {id: 3, name: 'taro', old: 24, sex: 'men'},
        {id: 4, name: 'taro', old: 24, sex: 'woman'},
        {id: 5, name: 'taro', old: 22, sex: 'woman'},
       ]

p hash.uniq { |h| [h[:name], h[:old]] }
# => [{:id=>1, :name=>"taro", :old=>22, :sex=>"men"}, {:id=>2, :pname=>"hanako", :old=>22, :sex=>"woman"}, {:id=>3, :name=>"taro", :old=>24, :sex=>"men"}]

ganmacs

ary = [1, 10, 2, 5, 8, 4, 6]
ary.each_with_index.max[1]

ganmacs

a = {c: 3, b: 2, dd: 5, a: 1}
p a.sort.to_h

ganmacs

# メソッド内で

value = foo_method
return if value.nil?

# 下でも一緒

value = foo_method.tap { |e| return  if  e.nil?}

ganmacs

AllCops:
  Exclude:
    - 'db/schema.rb'
    - 'vendor/**/*'
    - 'db/migrate/**/*'

Metrics/LineLength:
  Max: 120

Metrics/CyclomaticComplexity:

ganmacs

require 'forwardable'
class A
  extend Forwardable
  def_delegators :@ary, :size, :[]=, :[], :<<, :to_s, :inspect

  def initialize
    @ary = []
  end
end

ganmacs

find . -type f | grep -v git | awk -F/ '{t="  |---"}n==$2{printf "%s%s\n",t,$3}n!=$2&&$3!=""{n=$2;printf "%s \n%s%s\n",$2,t,$3}n!=$2&&$3==""{print $2}' | awk '/^ /{printf "| %s\n", $0} /^[^ ]/{printf "|--%s\n", $1}' | gtac | awk 'BEGIN{n=0} n==1{print $0}n==0{printf "    %s\n",$2}n==0&&$2==""{print}$2==""{n=1}END{print "."}' | gtac | grep -v ' $'

ganmacs

module A
  class << self
    def setup!
      @config = 'config'
    end

    def setup
      @config
    end

ganmacs

class A
  CONFIGURES = %i(user mail pass).freeze

  def initialize(config = {})
    CONFIGURES.each do |e|
      instance_variable_set(:"@#{e}", config[e] || 'nil')
    end
  end
end

ganmacs

class Object
  def current_method_name
    caller.first.match(/`(?<method_name>.*)'/)[:method_name]
  end
end

puts current_method_name #=> "<main>"