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tree -aF

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git log --reverse

# show branch tag etc
git log --reverse --decorate

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touch $(date +%Y-%m-%d-%H-%M).bak

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du -sh ./* | sort -nr

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class D                                                                                                                                                                                   
    attr_accessor :name, :elements
    def initialize; yield self; end
    def print
        puts "#{@name}/"
        elements.each {|e| e.print}
    end
end

class F

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lines = [
  ['user_code', 'sex', 'zangyo', 'q1', 'q2'],
  ['0001', '1', 'none', '1', '3'],
  ['0002', '1', 'none', '1', '3'],
  ['0003', '1', 'none', '1', '3'],
  ['0004', '1', 'none', '1', '3'],
  ['0005', '1', 'none', '1', '3']
]

heads = lines.shift.map(&:to_sym)

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$ cd $(bundle show activerecord)

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alias ctags="`brew --prefix`/bin/ctags"

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import UIKit


let code: String = "0001"
let num = code.toInt()! + 100
println(num)

// ---

let user_datas = [

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[sh]シェルスクリプト

条件演算子

$ man test

参考：http://shellscript.sunone.me/if_and_test.html