我有一个像这样的字符串数组：
strings = [
"ANT 107 90 Intro to Envrmntl Archaeology CMWL 101 TTH 01:00PM-02:15PM Markin 2/15 0 4.00",
"AMS 210 10 Intro to American Lit II SMTH 222 TTH 11:30AM-12:45PM DeProspo,R 0/25 0 4.00",
"AMS 210 11 Intro to American Lit II SMTH 222 TTH 01:00PM-02:15PM DeProspo,R 1/25 0 4.00",
"AMS 300 10 Toni Morrison DALY 107 TTH 10:00AM-11:15AM Knight 12/20 0 4.00",
"AMS 394 11 SpTp: Public Opinion Amer Pol DALY 107 TTH 02:30PM-03:45PM Cossette 5/16 0 4.00",
"ANT 105 10 Introduction to Anthropology CMWL 210 TTH 11:30AM-12:45PM Lampman 1/25 1 4.00",
"ANT 107 10 Intro to Envrmntl Archaeology CMWL 101 TTH 11:30AM-12:45PM Markin 2/25 0 4.00",
"ANT 107 90 Intro to Envrmntl Archaeology CMWL 101 TTH 01:00PM-02:15PM Markin 2/15 0 4.00",
"ANT 294 10 SpTp: Queer Anthropology CMWL 210 TTH 01:00PM-02:15PM Neely 0/12 1 4.00",
"ANT 300 10 Language and Culture CMWL 101 TTH 02:30PM-03:45PM Neely 1/18 0 4.00",
"ANT 320 10 Race and Ethnicity CMWL 101 TTH 10:00AM-11:15AM Lampman -4/16 2 4.00",
"ANT 104 10 Intro to World Music & Ethno GCA 204 TTH 10:00AM-11:15AM McCollum, J 0/25 0 4.00",
"ANT 105 10 Introduction to Anthropology CMWL 210 TTH 11:30AM-12:45PM Lampman 1/25 1 4.00",
"ANT 294 10 SpTp: Queer Anthropology CMWL 210 TTH 01:00PM-02:15PM Neely 0/12 1 4.00",
"ANT 300 10 Language and Culture CMWL 101 TTH 02:30PM-03:45PM Neely 1/18 0 4.00",
"ANT 320 10 Race and Ethnicity CMWL 101 TTH 10:00AM-11:15AM Lampman -4/16 2 4.00",
"ANT 104 10 Intro to World Music & Ethno GCA 204 TTH 10:00AM-11:15AM McCollum, J 0/25 0 4.00",
"ANT 105 10 Introduction to Anthropology CMWL 210 TTH 11:30AM-12:45PM Lampman 1/25 1 4.00",
"ANT 300 10 Language and Culture CMWL 101 TTH 02:30PM-03:45PM Neely 1/18 0 4.00",
"ANT 320 10 Race and Ethnicity CMWL 101 TTH 10:00AM-11:15AM Lampman -4/16 2 4.00",
"ANT 104 10 Intro to World Music & Ethno GCA 204 TTH 10:00AM-11:15AM McCollum, J 0/25 0 4.00",
"AMS 210 10 Intro to American Lit II SMTH 222 TTH 11:30AM-12:45PM DeProspo,R 0/25 0 4.00",
"AMS 210 11 Intro to American Lit II SMTH 222 TTH 01:00PM-02:15PM DeProspo,R 1/25 0 4.00",
"AMS 300 10 Toni Morrison DALY 107 TTH 10:00AM-11:15AM Knight 12/20 0 4.00",
"AMS 394 11 SpTp: Public Opinion Amer Pol DALY 107 TTH 02:30PM-03:45PM Cossette 5/16 0 4.00",
"ANT 104 10 Intro to World Music & Ethno GCA 204 TTH 10:00AM-11:15AM McCollum, J 0/25 0 4.00",
"ANT 294 10 SpTp: Queer Anthropology CMWL 210 TTH 01:00PM-02:15PM Neely 0/12 1 4.00",
"AMS 300 10 Toni Morrison DALY 107 TTH 10:00AM-11:15AM Knight 12/20 0 4.00",
]
我想按开始时间对此数组进行排序，01:00PM的第一个值为ANT 107 90 Intro to Envrmntl Archaeology。有没有直接的方法呢？
答案 0 :(得分：3)
这是使用DateTime的另一种选择：
require 'date'
strings.sort_by! do |item|
time = item.scan(/(\d{2}:\d{2}(PM|AM))/)
DateTime.parse(time.first.first).to_time.to_i
end
puts strings
答案 1 :(得分：1)
这是一种基于您的数据的快速入侵方法。并不是真正按时间排序（忽略AM / PM）只是按时间作为数值。
strings.sort! { |x,y|
# split on time delimeter
s = x.index('-')
# sort by time as numerical
x[s-7..s-1] <=> y[s-7..s-1]
}
puts strings
输出：
ANT 107 90 Intro to Envrmntl Archaeology CMWL 101 TTH 01:00PM-02:15PM Markin 2/15 0 4.00
ANT 294 10 SpTp: Queer Anthropology CMWL 210 TTH 01:00PM-02:15PM Neely 0/12 1 4.00
AMS 210 11 Intro to American Lit II SMTH 222 TTH 01:00PM-02:15PM DeProspo,R 1/25 0 4.00
ANT 294 10 SpTp: Queer Anthropology CMWL 210 TTH 01:00PM-02:15PM Neely 0/12 1 4.00
ANT 294 10 SpTp: Queer Anthropology CMWL 210 TTH 01:00PM-02:15PM Neely 0/12 1 4.00
ANT 107 90 Intro to Envrmntl Archaeology CMWL 101 TTH 01:00PM-02:15PM Markin 2/15 0 4.00
AMS 210 11 Intro to American Lit II SMTH 222 TTH 01:00PM-02:15PM DeProspo,R 1/25 0 4.00
ANT 300 10 Language and Culture CMWL 101 TTH 02:30PM-03:45PM Neely 1/18 0 4.00
AMS 394 11 SpTp: Public Opinion Amer Pol DALY 107 TTH 02:30PM-03:45PM Cossette 5/16 0 4.00
...
...
答案 2 :(得分：0)
您可以尝试：
data = <<data.split("\n")
ANT 107 90 Intro to Envrmntl Archaeology CMWL 101 TTH 01:00PM-02:15PM Markin 2/15 0 4.00
AMS 210 10 Intro to American Lit II SMTH 222 TTH 11:30AM-12:45PM DeProspo,R 0/25 0 4.00
AMS 210 11 Intro to American Lit II SMTH 222 TTH 01:00PM-02:15PM DeProspo,R 1/25 0 4.00
AMS 300 10 Toni Morrison DALY 107 TTH 10:00AM-11:15AM Knight 12/20 0 4.00
AMS 394 11 SpTp: Public Opinion Amer Pol DALY 107 TTH 02:30PM-03:45PM Cossette 5/16 0 4.00
ANT 105 10 Introduction to Anthropology CMWL 210 TTH 11:30AM-12:45PM Lampman 1/25 1 4.00
ANT 107 10 Intro to Envrmntl Archaeology CMWL 101 TTH 11:30AM-12:45PM Markin 2/25 0 4.00
ANT 107 90 Intro to Envrmntl Archaeology CMWL 101 TTH 01:00PM-02:15PM Markin 2/15 0 4.00
ANT 294 10 SpTp: Queer Anthropology CMWL 210 TTH 01:00PM-02:15PM Neely 0/12 1 4.00
ANT 300 10 Language and Culture CMWL 101 TTH 02:30PM-03:45PM Neely 1/18 0 4.00
ANT 320 10 Race and Ethnicity CMWL 101 TTH 10:00AM-11:15AM Lampman -4/16 2 4.00
ANT 104 10 Intro to World Music & Ethno GCA 204 TTH 10:00AM-11:15AM McCollum, J 0/25 0 4.00
ANT 105 10 Introduction to Anthropology CMWL 210 TTH 11:30AM-12:45PM Lampman 1/25 1 4.00
ANT 294 10 SpTp: Queer Anthropology CMWL 210 TTH 01:00PM-02:15PM Neely 0/12 1 4.00
ANT 300 10 Language and Culture CMWL 101 TTH 02:30PM-03:45PM Neely 1/18 0 4.00
ANT 320 10 Race and Ethnicity CMWL 101 TTH 10:00AM-11:15AM Lampman -4/16 2 4.00
ANT 104 10 Intro to World Music & Ethno GCA 204 TTH 10:00AM-11:15AM McCollum, J 0/25 0 4.00
ANT 105 10 Introduction to Anthropology CMWL 210 TTH 11:30AM-12:45PM Lampman 1/25 1 4.00
ANT 300 10 Language and Culture CMWL 101 TTH 02:30PM-03:45PM Neely 1/18 0 4.00
ANT 320 10 Race and Ethnicity CMWL 101 TTH 10:00AM-11:15AM Lampman -4/16 2 4.00
ANT 104 10 Intro to World Music & Ethno GCA 204 TTH 10:00AM-11:15AM McCollum, J 0/25 0 4.00
AMS 210 10 Intro to American Lit II SMTH 222 TTH 11:30AM-12:45PM DeProspo,R 0/25 0 4.00
AMS 210 11 Intro to American Lit II SMTH 222 TTH 01:00PM-02:15PM DeProspo,R 1/25 0 4.00
AMS 300 10 Toni Morrison DALY 107 TTH 10:00AM-11:15AM Knight 12/20 0 4.00
AMS 394 11 SpTp: Public Opinion Amer Pol DALY 107 TTH 02:30PM-03:45PM Cossette 5/16 0 4.00
ANT 104 10 Intro to World Music & Ethno GCA 204 TTH 10:00AM-11:15AM McCollum, J 0/25 0 4.00
ANT 294 10 SpTp: Queer Anthropology CMWL 210 TTH 01:00PM-02:15PM Neely 0/12 1 4.00
AMS 300 10 Toni Morrison DALY 107 TTH 10:00AM-11:15A
data
puts data.sort_by{|x|
x =~ /\s(\d\d:\d\d)([AP])M/
'%s%s' % [$2=='A' ? 0 : 1,$1]
}
您的数据不需要$2=='A' ? 0 : 1，但它与
data = <<data.split("\n")
ANT 107 90 Intro to Envrmntl Archaeology CMWL 101 TTH 01:00PM-02:15PM Markin 2/15 0 4.00
AMS 210 10 Intro to American Lit II SMTH 222 TTH 02:00AM-12:45PM DeProspo,R 0/25 0 4.00
data
答案 3 :(得分：0)
arr = [
"ANT 107 90 Intro to Archaeology 01:00PM-02:15PM Markin ",
"AMS 210 10 Intro to Lit I 11:30AM-12:45PM DeProspo,R ",
"AMS 210 11 Intro to Lit II 02:00PM-03:15PM DeProspo,R ",
"AMS 300 10 Toni Morrison 10:00AM-11:15AM Knight "
]
arr.sort_by { |s| [s[40], s[35,5]] }
#=> ["AMS 300 10 Toni Morrison 10:00AM-11:15AM Knight ",
# "AMS 210 10 Intro to Lit I 11:30AM-12:45PM DeProspo,R ",
# "ANT 107 90 Intro to Archaeology 01:00PM-02:15PM Markin ",
# "AMS 210 11 Intro to Lit II 02:00PM-03:15PM DeProspo,R "]
请注意，如果s = arr.first则
[s[40], s[35,5]]
#=> ["P", "01:00"]
Enumerable#sort_by文档的第三段解释了Array#<=>使用的数组顺序。字符串的排序（例如，比较"P"与"A"或"01:00"与"01:20"）在String#<=>的文档中进行了解释。["A", "11:30"]在["P", "01:00"]之前排序，因为"A"在"P"之前。同样，["P", "01:00"]在["P", "02:00"]之前排序，因为两个数组的第一个元素相等，而"01:00"在"02:00"之前。
也可以写
arr.sort_by { |s| s[40] + s[35,5] }
s = arr.first然后
s[40] + s[35,5]
#=> "P01:00"