Question

附加的代码需要能够检查输入的数字是否在数组中，然后运行，如果为true，则运行，如果为false，则返回一条消息。

accounts = [5658845, 4520125, 7895122, 8777541, 8451277, 1302850, 8080152, 4562555, 5552012, 5050552, 7825877, 1250255,
       1005231, 6545231, 3852085, 7576651, 7881200, 4581002,]
puts "What is your account number?"
my_account = gets.to_i
for v in (my_account)
  if v ==(my_account) 
    puts "Welcome to your account"
  end
end

Answer 1

这行是错误的

for v in (my_account)

应该是

for v in accounts

您要遍历accounts数组中的数字，而不是my_account，这只是一个数字

Answer 2

您应该尝试：

accounts = [5658845, 4520125, 7895122, 8777541, 8451277, 1302850, 8080152, 4562555, 5552012, 5050552, 7825877, 1250255,
       1005231, 6545231, 3852085, 7576651, 7881200, 4581002,]
puts "What is your account number?"
my_account = gets.to_i
if accounts.include?(my_account)
  puts "Welcome to your account"
else
  # do whatever you need to do
end

Answer 3

您应该使用Array#include?

accounts = [5658845, 4520125, 7895122, 8777541, 8451277, 1302850, 8080152, 4562555, 5552012, 5050552, 7825877, 1250255, 1005231, 6545231, 3852085, 7576651, 7881200, 581002]
puts 'What is your account number?'
my_account = gets.to_i

if accounts.include?  my_account
  puts 'Welcome to your account'
else
  puts 'It is not you account'
end

将for与puts一起使用，将枚举数组中的所有项目。

例如：

accounts = [1, 2, 3]
puts "What is your account number?"
my_account = gets.to_i

for v in accounts
  if v == my_account
    puts "Welcome to your account #{v}"
  else
    puts "#{v} is not your account"
  end
end

# What is your account number?
# 2
# 1 is not your account
# Welcome to your account 2
# 3 is not your account

Ruby True / False数组

3 个答案: