红宝石动态哈希键

Question

我的S3文件的路径列表的形式像

a/b/c 
a/b/c/d.txt 
a/d/e.txt 

一个桶是有办法，我可以创建上述信息的JSON表示，我正在寻找类似

{:a=>{:b=>{:c=>[d.txt]},:d=>[e.txt]}}

我已生成使用eval的动态密钥的名字，但我不能做

eval(a[:b]X) where X is something like [:c]

在此先感谢

Answer 1

files = %w(a/b/c.txt a/b/c/d.txt a/d/e.txt) 
files.reject do |f| # first of all, remove redundant dirs 
    files.any? { |ff| ff != f && ff.start_with?(f) } 
end.each_with_object({}) do |f, memo| 
    *path, file = f.split('/') 
    bucket = path.inject(memo) { |acc, k| acc[k] ||= {} } 
    (bucket[:files] ||= []) << file 
end 
#⇒ { 
# "a" => { 
# "b" => { 
#   "c" => { 
#  :files => [ 
#   [0] "d.txt" 
#  ] 
#  }, 
#  :files => [ 
#  [0] "c.txt" 
#  ] 
# }, 
# "d" => { 
#  :files => [ 
#  [0] "e.txt" 
#  ] 
# } 
# } 
# }