Hash和每個方法

Question

我有一個哈希：

lines = { 
    :n => ["Times Square", "34th", "28th", "23rd", "Union Square", "8th"], 

當我這樣做：

first_line = lines[:n] 
a = first_line[0] 
b = first_line[4] 
(a..b).select{|x| puts x} 

我得到一個超過極限。有沒有辦法打印範圍從a到b？

大家好，你可以停止標誌着我失望哎呀:) ......我忘了了最新我的答案... BTW另一種爲上述方案是

lines = { 
:n => ["Times Square", "34th", "28th", "23rd", "Union Square", "8th"} 

puts first_line = lines[:n] 
puts first_line.slice(0, 5) => "Times Square", "34th", "28th", "23rd", "Union Square" 

Answer 1

它不是無限的，但'Times Square'到'Union Square'是一個很長的範圍，涉及'Times Squarf','Times Squarg'等等。如果你想獲得第0-4行，它是：

lines[:n][0..4].each { |x| puts x }