我用Ruby解析csv文件时无法获取标头

Question

我无法获取标头。没有错误发生。我怎样才能正确地得到它？

数据：

"A","B","C" 
"1","2","3" 

红宝石：

require "csv" 

table = CSV.read("filename", :headers => true) 

puts table[0] # "1","2","3" 

puts table[headers] # Nothing happens. 

Answer 1

尝试table.headers：

irb(main):006:0> table.headers 
=> ["A", "B", "C"] 

你是如何运行的代码？ table[headers]应该会返回一个错误：

irb(main):008:0> table[headers] 
NameError: undefined local variable or method `headers' for main:Object 
    from (irb):8 
    from /usr/bin/irb:12:in `<main>'