如何保存一个散列成CSV [英] How to save a hash into a CSV

问题描述

我在红宝石是新的，所以请原谅noobishness。

I am new in ruby so please forgive the noobishness.

我有两列的CSV。一个用于动物的名称和一个用于动物类型。
我有所有的键是动物的名称和动物被类型值的哈希值。我还想写哈希到CSV不使用fasterCSV。我已经想到了一些想法是什么将是最简单..这里是基本布局。

I have a CSV with two columns. One for animal name and one for animal type. I have a hash with all the keys being animal names and the values being animal type. I would like to write the hash to the CSV without using fasterCSV. I have thought of several ideas what would be easiest.. here is the basic layout.

require "csv"

def write_file
  h = { 'dog' => 'canine', 'cat' => 'feline', 'donkey' => 'asinine' }

  CSV.open("data.csv", "wb") do |csv|
    csv << [???????????]
  end
end

当我打开文件，从中读取我打开了它 File.open（blabla.csv，标题：真）
有没有可能写回文件以同样的方式？

When I opened the file to read from it I opened it File.open("blabla.csv", headers: true) Would it be possible to write back to the file the same way?

推荐答案

试试这个：

require 'csv'
h = { 'dog' => 'canine', 'cat' => 'feline', 'donkey' => 'asinine' }
CSV.open("data.csv", "wb") {|csv| h.to_a.each {|elem| csv << elem} }

将导致：

1.9.2-p290:~$ cat data.csv 
dog,canine
cat,feline
donkey,asinine

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