ruby-simplify字符串乘法级联

像这样的东西是最简单和有效的( as seen on ideone.com ):

puts 'Hello' * 3   # HelloHelloHello
 
s = 'Go'
x = 4
z = s * (x - 1)
puts z             # GoGoGo

ruby-doc.org - String str * integer => new_str

copy返回一个新的 字符串 包含 收件人的副本。

"Ho! " * 3   #=> "Ho! Ho! Ho! "

z=''
(x-1).times do
 z+=s
end

伪代码(不是ruby)

if 1 < int(x) < 7  then
   z = (x-1)*s

例如,对于高达5颗星的评级系统,您可以使用以下内容:

def rating_to_star(rating)
   'star' * rating.to_i + 'empty_star' * (5 - rating.to_i)
end