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@giruzou
giruzou / ruby
Created October 9, 2018 06:59
Ruby1~10まで出力 ref: https://qiita.com/DrqYuto/items/2137e22948b38e878828
puts [*1..10]
=begin
1
2
3
4
5
6
7
8
@giruzou
giruzou / file0.txt
Last active October 9, 2018 06:57
Rubya~zまで出力 ref: https://qiita.com/DrqYuto/items/349601a68fd422a0eab1
puts [*?a..?z]
#？aで文字リテラル化している
#参考https://docs.ruby-lang.org/ja/latest/doc/spec=2fliteral.html
=begin
a
b
c
d
e
f
@giruzou
giruzou / Node.js
Created October 8, 2018 09:29
Ruby,Node.js真偽値を得る方法7選 ref: https://qiita.com/DrqYuto/items/1e526180ffd6ce9493e1
console.log(!0)
//=>true
console.log(!1)
//=>false
console.log(!!0)
//=>false
console.log(!!1)
//=>true
console.log(!"")
//=>true
@giruzou
giruzou / ruby
Last active November 20, 2018 08:12
Ruby0を得る方法3種 ref: https://qiita.com/DrqYuto/items/af487e22aac0eef61e02
puts ((6<<29)%3)
#=>0
puts Array.new.size
#=>0
puts [].sum
#=>0
@giruzou
giruzou / ruby
Created October 8, 2018 08:34
Ruby-1を得る方法 ref: https://qiita.com/DrqYuto/items/b426909dd015a7483048
puts(~0)
#=>-1
@giruzou
giruzou / Node.js
Last active October 13, 2018 12:32
Node.js,Ruby1を得る ref: https://qiita.com/DrqYuto/items/ce699c2a455d135e7366
console.log(+true)
console.log(-~0)
console.log(+!0)
//=>1
@giruzou
giruzou / ruby
Created October 6, 2018 13:03
Ruby各桁の総和計算 ref: https://qiita.com/DrqYuto/items/bc9336ebfa2436a65c2c
puts gets.chomp.chars.map(&:to_i).inject(:+)
@giruzou
giruzou / ruby
Created October 6, 2018 09:34
Ruby末尾文字列追加3種 ref: https://qiita.com/DrqYuto/items/4dab8c89340f19230f51
puts gets.chomp+("++")
@giruzou
giruzou / ruby
Created October 5, 2018 08:33
Rubyオセロ点数計算 ref: https://qiita.com/DrqYuto/items/127aba1007053a3acf7a
puts 64-gets.to_i;
@giruzou
giruzou / ruby
Created September 29, 2018 04:56
Rubyクラスの継承 ref: https://qiita.com/DrqYuto/items/7b3901c1058389bea8cb
class MyArray < Array
def multiply(n)
self.map {|e| e * n}
end
end