正如mikeb指出的，有文档 - http://ruby-doc.org/stdlib-1.9.3/libdoc/csv/rdoc/CSV.html - 或者，您也可以按照下面的示例（所有的测试和工作）：

As mikeb pointed out, there are the docs - http://ruby-doc.org/stdlib-1.9.3/libdoc/csv/rdoc/CSV.html - Or you can follow along with the examples below (all are tested and working):

在这个文件中，我们将有两行，一个标题行和一个数据行，非常简单的CSV：

In this file we'll have two rows, a header row and data row, very simple CSV:

require "csv"
CSV.open("file.csv", "wb") do |csv|
  csv << ["animal", "count", "price"]
  csv << ["fox", "1", "$90.00"]
end

文件称为file.csv，具有以下内容：

result, a file called "file.csv" with the following:

animal,count,price
fox,1,$90.00

---

如何将数据附加到CSV

几乎相同的forumla，而不是使用wb模式，我们将使用a +模式。有关这些的详细信息，请参阅此堆栈溢出答案：什么是

---

How to append data to a CSV

Almost the same forumla as above only instead of using "wb" mode, we'll use "a+" mode. For more information on these see this stack overflow answer: What are the Ruby File.open modes and options?

CSV.open("file.csv", "a+") do |csv|
  csv << ["cow", "3","2500"]
end

打开我们的file.csv我们有：

Now when we open our file.csv we have:

animal,count,price
fox,1,$90.00
cow,3,2500

---

现在，您知道如何复制和写入文件，读取CSV，因此抓取您刚才所做的操作数据：

---

Read from our CSV file

Now you know how to copy and to write to a file, to read a CSV and therefore grab the data for manipulation you just do:

CSV.foreach("file.csv") do |row|
  puts row #first row would be ["animal", "count", "price"] - etc.
end

当然，这是一个像一百种不同的方式，你可以使用这个gem从CSV中拉取信息。有关详情，建议您访问文档，现在您有一个底漆： http：/ /ruby-doc.org/stdlib-1.9.3/libdoc/csv/rdoc/CSV.html

Of course this is like one of like a hundred different ways you can pull info from a CSV using this gem. For more info I suggest visiting the docs now that you have a primer: http://ruby-doc.org/stdlib-1.9.3/libdoc/csv/rdoc/CSV.html