我基本上想要列出给定列车编号的下一个时刻表（time_tables）。 通过输入列车编号。从那里开始寻找其余的线性路线，火车将长期获得不同的时间表）。当第一个time_table结束时，另一个time_table开始，依此类推。
现在我很快就会进入内循环：
未定义的方法`[]＆＃39; for nil：NilClass（NoMethodError）
require 'date'
Time_tables = [
{ name: '01251', start_date: '2014-04-24 22:03:00', start_location: 'A', end_date: '2014-04-24 22:10:00', end_location: 'BC' },
{ name: '05012', start_date: '2014-04-24 22:20:00', start_location: 'RI', end_date: '2014-04-24 23:10:00', end_location: 'XX' },
{ name: '03232', start_date: '2014-04-24 17:10:00', start_location: 'X', end_date: '2014-04-24 20:10:00', end_location: 'B' },
{ name: '02435', start_date: '2014-04-24 17:10:00', start_location: 'Z', end_date: '2014-04-24 20:10:00', end_location: 'B' },
{ name: '04545', start_date: '2014-04-24 22:15:00', start_location: 'BC', end_date: '2014-04-24 22:20:00', end_location: 'RI' },
{ name: '03545', start_date: '2014-04-24 23:15:00', start_location: 'XX', end_date: '2014-04-25 00:10:00', end_location: 'E' }
]
def finding_next_stops(time_tables, train_number)
#variables:
@referenced_point
joined_time_tables = []
time_tables.sort_by! do |time_table|
DateTime.parse(time_table[:start_date]).to_time
end
#looking for the given time_table
time_tables.each do |i|
if i[:name] == train_number
@referenced_point = i
end
end
#adding the time_table to the container and then starting the search from this item
0.upto(time_tables.size-1) do |i|
#If it's empty I wanna start with the referenced_point(this time_table)
if joined_time_tables.empty?
p 'gets in once!'
middle_hand_container = @referenced_point
else
middle_hand_container = [time_tables[i]]
end
0.upto(i-1) do |j|
j_end_date = joined_time_tables[j][-1][:end_date]
i_start_date = time_tables[i][:start_date]
if j_end_date <= i_start_date
if joined_time_tables[j][-1][:end_location].eql? time_tables[i][:start_location]
#if longest[j].size + 1 > long_for_i.size # shall I check this ?
middle_hand_container = joined_time_tables[j] + [time_tables[i]]
#end
end
end
end
joined_time_tables[i] = middle_hand_container
end
return joined_time_tables[-1]
end
finding_next_stops(Time_tables, '05012')
如果我输入：＆＃39; 05012＆＃39; - train_number我应该得到：
如果我输入：＆＃39; 04545＆＃39; train_number我应该得到：
答案 0 :(得分：0)
你的问题在这里：
j_end_date = joined_time_tables[j][-1][:end_date]
join_time_tables包含一系列哈希值。 [j]返回一个哈希值，因此[-1]返回nil。您应该删除[j]或[-1]（我不确定哪个，因为代码太复杂了。）
<强>更新
我认为你的目标@referenced_point是一个数组，但实际上并非如此：
time_tables.each do |i|
if i[:name] == train_number
@referenced_point = i
end
end
您应该将其包装在一个数组中，以便您的代码能够正常工作：
middle_hand_container = @referenced_point
但我确实认为您的代码需要严格的重构。