[英]Ruby: Iterating Over Array Based on Following Elements
我正在使用Ruby创建每周一次的会议报告。 我有一个包含会议名称的大型数组,并且根据会议发生的周数,每个元素都有多个实例。
我从以下简化示例开始:
meetingsArray = ["boardInvestorsMeeting", "clientMeeting", "clientMeeting", "clientMeeting", "waterCoolerChat", "waterCoolerChat", "waterCoolerChat", "waterCoolerChat"]
我的尝试:
meetingsArray = ["boardInvestorsMeeting", "clientMeeting", "clientMeeting", "clientMeeting", "waterCoolerChat", "waterCoolerChat", "waterCoolerChat", "waterCoolerChat"]
for m in meetingsArray[m.to_i]
if (meetingsArray[m.to_i] === meetingsArray[(m.to_i) + 1] && meetingsArray[m.to_i] === meetingsArray[(m.to_i) + 2] && meetingsArray[m.to_i] === meetingsArray[(m.to_i) + 3])
puts "Week of the 1st: " + "#{meetingsArray[m.to_i].inject{|a| a}}"
elsif (meetingsArray[m.to_i] === meetingsArray[(m.to_i) + 1] && meetingsArray[m.to_i] === meetingsArray[(m.to_i) + 2])
puts "Week of the 8th: " + "#{meetingsArray[m.to_i].inject{|a| a}}"
elsif (meetingsArray[m.to_i] === meetingsArray[(m.to_i) + 1])
puts "Week of the 15th: " + "#{meetingsArray[m.to_i].inject{|a| a}}"
else
puts "Week of the 22nd: " + "#{meetingsArray[m.to_i].inject{|a| a}}"
end
end
控制台错误:
iMac:workspace user1$ ruby loop.rb
loop.rb:3:in `<main>': undefined method `each' for "boardInvestorsMeeting":String (NoMethodError)
所需结果:
Week of the 1st: boardInvestorsMeeting
Week of the 1st: clientMeeting
Week of the 8th: clientMeeting
Week of the 15th: clientMeeting
Week of the 1st: waterCoolerChat
Week of the 8th: waterCoolerChat
Week of the 15th: waterCoolerChat
Week of the 22nd: waterCoolerChat
请注意, "clientMeeting"
前面有"Week of the 1st:"
然后是"Week of the 8th:"
然后是"Week of the 15th:"
,因为重复了两次; 而"boardInvestorsMeeting"
只有"Week of the 1st:"
在它前面的,因为它不重复,只出现在meetingsArray
一次。
干得好!
meetingsArray = ["boardInvestorsMeeting", "clientMeeting", "clientMeeting", "clientMeeting", "waterCoolerChat", "waterCoolerChat", "waterCoolerChat", "waterCoolerChat"]
counts = Hash.new(0)
meetingsArray.each { |name| counts[name] += 1 }
counts.each do |k,v|
case v
when 1
puts "Week of the 1st: #{k}"
when 2
puts "Week of the 1st: #{k}"
puts "Week of the 8th: #{k}"
when 3
puts "Week of the 1st: #{k}"
puts "Week of the 8th: #{k}"
puts "Week of the 15th: #{k}"
when 4
puts "Week of the 1st: #{k}"
puts "Week of the 8th: #{k}"
puts "Week of the 15th: #{k}"
puts "Week of the 22nd: #{k}"
end
end
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