创建环境变量的索引哈希

时间:2012-08-21 01:46:02

标签: ruby rhomobile

我有一个小的ruby函数来返回查询结果。我想检查我的服务器上的env变量,所以我写了这个函数。但它并没有像我预期的那样基于puts输出和代码返回@result。我做错了什么?

  def query(params=nil)
    @result = {}
    count = 1
    ENV.each do |k,v|
     @result[count.to_s] = { "name" => k, "company" => v }
     puts "[#{count.to_s}] = { 'name' => #{k}, 'company' => #{v} }"
     count += 1
    end
  end

输出输出:

irb(main):070:0> query
[1] = { 'name' => ALLUSERSPROFILE, 'company' => C:\ProgramData }
[2] = { 'name' => APPDATA, 'company' => C:\Users\xxxx\AppData\Roaming }
[3] = { 'name' => CLIENTNAME, 'company' => xxxx }
[4] = { 'name' => COLUMNS, 'company' => 160 }
[5] = { 'name' => CommonProgramFiles, 'company' => C:\Program Files (x86)\Common Files }
[6] = { 'name' => CommonProgramFiles(x86), 'company' => C:\Program Files (x86)\Common Files }
[7] = { 'name' => CommonProgramW6432, 'company' => C:\Program Files\Common Files }
....

@result

irb(main):075:0> @result
=> {"ALLUSERSPROFILE"=>"C:\\ProgramData", "APPDATA"=>"C:\\Users\\xxxx\\AppData\\Roaming", "CLIENTNAME"=>"wxxxx", "COLUMNS"=>"160", "CommonProgramFiles"=>"C:
\\Program Files (x86)\\Common Files", "CommonProgramFiles(x86)"=>"C:\\Program Files (x86)\\Common Files", "CommonProgramW6432"=>"C:\\Program Files\\Common Files .....

2 个答案:

答案 0 :(得分:1)

将数组用于列表:

def query
  ENV.map {|k,v|  { "name" => k, "company" => v } }
end

@result = query

然后根据需要打印。

如果你真的想要索引哈希,请使用:

def query
  result = []
  ENV.each_with_index {|v,i|  result.push(i, { "name" => v[0], "company" => v[1] }) }
  Hash[*result]
end

答案 1 :(得分:0)

嗯,这很奇怪。我在本地运行代码,它按预期工作,将@result设置为以下内容......

 > @result
 => {"1"=>{"name"=>"jabjab", "company"=>"jibjib"}, "2"=>{"name"=>"blabla"...

但是,我确实注意到query返回环境的内容,这就是@result的值。您是否可能按以下方式调用查询,覆盖@result的值?这很容易被忽视。

> @result = query