pocke

require 'levenshtein'

content = ARGF.read.split(/[^\w]/).grep(/^\w+$/)
h = {}
content.each do |c|
  h[c] ||= 0
  h[c] += 1
end

words = h.keys

pocke

p defined? x # => nil
p defined? y # => nil

[1,2,3].each do |x|
  x
  y = 1
end

p defined? x # => nil
p defined? y # => nil

pocke

require 'benchmark'
Benchmark.bm 10 do |x|
  x.report('=~'){    10000000.times{/a/ =~ 'a'; /b/ =~ 'a' }}
  x.report('==='){   10000000.times{/a/ === 'a'; /b/ === 'a' }}
  x.report('match'){ 10000000.times{/a/.match('a'); /b/.match('a') }}
  x.report('match?'){10000000.times{/a/.match?('a'); /b/.match?('a') }}
end

pocke

" OpFuncName が定義される
" Denite によって提供される
call denite#get_opfunc('file_rec -some-arg', 'OpFuncName')

" Operator を定義する
" ユーザーが vim-operator-user などの任意のプラグイン or プラグインに依存しない形で扱える
call operator#user#define('denite-file_rec', 'OpFuncName')
map <Space>uo <Plug>(operator-denite-file_rec)

pocke

class Fixnum
  def <(right)
    super ? right : nil
  end

  def >(right)
    super ? right : nil
  end

  def >=(right)

pocke

$ < p_ck_161121.csv |
  ruby -rcgi -rcsv -e '
  CSV.parse($<){|row|
    puts CGI.unescapeHTML(row[2].gsub(/\@[a-zA-Z0-9_]+/, "").gsub(%r!https?://\S+!, ""))
  }' | head -12000 |
  docker run --rm -i docker-mecab-neologd:latest |
  grep '\s名詞,' | grep -v '語幹' | grep -v '非自立' | grep -v -E '^ー+\s' | cut -f 1 | ruby -pe '$_.downcase!' | sort | grep -v '^.$' |
  ruby -e '
  c = 1; p = nil;
  while gets

pocke

require 'benchmark'
Benchmark.bm(20) do |x|
  array = (1..100000).map { rand(100000) }
  x.report('10000 max_by'){100.times{array.max_by{|x| x.to_s}}}
  x.report('10000 max'){   100.times{array.max{|a, b| a.to_s <=> b.to_s }}}

  x.report('10000 min_by'){100.times{array.min_by{|x| x.to_s}}}
  x.report('10000 min'){   100.times{array.min{|a, b| a.to_s <=> b.to_s }}}
end

pocke

AllCops:
  TargetRubyVersion: 2.3
Style/ConditionalAssignment:
  EnforcedStyle: assign_inside_condition
  Enabled: true

pocke

def foo
  tap do
    $_ = 3
    p $_
  end
  p $_
end
foo

puts '-------------'

pocke

diff --git a/ruby b/rails
index bf5e5a1..79ff999 100644
--- a/ruby
+++ b/rails
@@ -1,3 +1,4 @@
+`
 ^
 <=>
 =~
@@ -8,47 +9,77 @@