为什么这个ruby序列不能用于双位数字？

发布时间：2020-12-17 02:49:38 所属栏目：百科来源：网络整理

导读：我正在用 ruby创建一个程序来组织数字序列.除了涉及两位数字之外,它完美地工作,这里是代码： print "Hello participant today we will be rearranging your numbers from smallest to largest,press enter to continue!!"gets.chompprint "Please enter your

我正在用 ruby创建一个程序来组织数字序列.除了涉及两位数字之外,它完美地工作,这里是代码：

print "Hello participant today we will be rearranging your numbers from smallest to largest,press enter to continue!!"
gets.chomp

print "Please enter your first number"
n1 = gets.chomp

print "Please enter your second number"
n2 = gets.chomp

print "Please enter your third number"
n3 = gets.chomp

print "Please enter your fourth number"
n4 = gets.chomp

print "Please enter your fifth number"
n5 = gets.chomp

a = [n1,n2,n3,n4,n5]

print "your numbers from smallest to largest are: #{a.sort!}"
gets.chomp

print "thank you for participating,See you next time!!"

解决方法

排序字符串数组或整数数组

[n1,n5]是一个字符串数组,字符串与lexicographic order进行比较.

["1","2","3","4","5","6","7","8","9","10","11","12"].sort
#=> ["1","12","9"]

["12","1","10"].sort_by(&:to_i)
#=> ["1","12"]

所以你需要：

print "your numbers from smallest to largest are: #{a.sort_by(&:to_i)}"

或者只是将您的字符串数组转换为整数数组：

a = [n1,n5].map(&:to_i)

print "your numbers from smallest to largest are: #{a.sort}"

重构

这是编写脚本的简短方法：

puts "Hello participant today we will be rearranging your numbers from smallest to largest,press enter to continue!!"
gets

a = %w(first second third fourth fifth).map do |ordinal|
  puts "Please enter your #{ordinal} number"
  gets.to_i
end

puts "Your numbers from smallest to largest are: #{a.sort}"
gets

puts "Thank you for participating,See you next time!!"

（编辑：李大同）

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