ruby1.9中CSV.open的API变化

参考博文:

http://comments.gmane.org/gmane.comp.lang.ruby.japanese/5658

http://permalink.gmane.org/gmane.comp.lang.ruby.japanese/5662

 

有一个文本文件test.txt (或者test.csv),其内容为:

Fred Bloggs,Manager,Male,45
Laura Smith,Cook,Female,23
Debbie Watts,Professor,Female,38

 

Ruby 代码:

#!/usr/bin/ruby
require 'csv'

# CSV.open('test.csv','r') do |person|
CSV.open('test.txt','r') do |person|
  # p person
  puts person.inspect
end

 

按照书中的示例,代码应该打印三个数组,  

["Fred Bloggs", "Manager", "Male", "45"]
["Laura Smith", "Cook", "Female", "23"]
["Debbie Watts", "Professor", "Female", "38"]

 

但实际的运行结果如下:

输出:

<#CSV io_type:File io_path:"test.txt" encoding:GBK lineno:0 col_sep:"," row_sep:"\r\n" quote_char:"\"">

 

后来经过调查得知,自己前不久将ruby的版本从1.8升级至了→

ruby 1.9.2p180 (2011-02-18 revision 30909) [i686-linux],

 

而ruby1.9中CSV.open的API发生了变更,在ruby1.9中要想打印或者输出csv/txt的文件内容,

需要按照如下的写法:

require 'csv'

CSV.open(...) do |csv|
    csv.each do |row|
      p row
    end
end

 

 

 

 

 

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