我正在做 Jumpstart Lab 的事件管理器问题，并且已经解决了一天中的时间问题。推荐的方法#strparse 在第一次输入时给了我这个问题，所以我环顾四周并使用了 DT.parse() 和 #strftime，它解析了前几次但在 8 之后就死了……嗯，你会看到的。
我在 Win 7 和 OSX 10.7 上试过这个。都 Ruby 1.9.3
require "csv"
require 'date'
contents = CSV.open "C:\\Users\\...\\Desktop\\event_manager\\event_attendees.csv", headers: true, header_converters: :symbol
def time_of_day(row, id)
raw_date = row[:regdate]
if raw_date[-5] == ' ' #Thought the problem might be related to padding
#raw_date = raw_date.insert(-5, '0')
return time_of_day_2(raw_date, id)
end
p raw_date + " ID: #{id}"
new_date = DateTime.parse(raw_date) #Line 48
new_date = new_date.strftime('%l:%M %p')
new_date + "ID: #{id}"
end
def time_of_day_2(raw_date, id)
p raw_date + " ID: #{id}"
'00:00'
end
contents.each do |row|
name = row[:first_name].capitalize
id = row[0]
time_of_day = time_of_day(row, id) #Line 71
p time_of_day
end
结果是这样的：
"11/12/08 10:47 ID: 1"
"10:47 AM ID: 1"
C:/Users/.../Desktop/event_manager/lib/event_manager.rb:48:in `parse"11/12/08 13:23 ID: 2" #I don't know why it prints this up here
" 1:23 PM ID: 2"
"11/12/08 13:30 ID: 3"
" 1:30 PM ID: 3"
"11/12/08 14:04 ID: 4"
" 2:04 PM ID: 4"
"11/12/08 14:46 ID: 5"
" 2:46 PM ID: 5"
"11/12/08 15:00 ID: 6"
" 3:00 PM ID: 6"
"11/12/08 16:05 ID: 7"
" 4:05 PM ID: 7"
"11/12/08 17:18 ID: 8"
" 5:18 PM ID: 8"
"11/13/08 1:32 ID: 9"
"00:00"
"11/13/08 16:40 ID: 10"
': invalid date (ArgumentError)
from C:/Users/.../Desktop/event_manager/lib/event_manager.rb:48:in `time_of_day'
from C:/Users/.../Desktop/event_manager/lib/event_manager.rb:71:in `block in <main>'
from C:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/csv.rb:1792:in `each'
from C:/Users/.../Desktop/event_manager/lib/event_manager.rb:59:in `<main>'
[Finished in 2.7s with exit code 1]
先感谢您