我有一个小的 ruby 函数来返回查询结果。我想检查服务器上的环境变量,所以我编写了这个函数。但它并没有像我预期的那样根据 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
放置输出:
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 }
....
@结果
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 .....
最佳答案
对列表使用数组:
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,使用:
def query
result = []
ENV.each_with_index {|v,i| result.push(i, { "name" => v[0], "company" => v[1] }) }
Hash[*result]
end
关于ruby - 制作环境变量的索引哈希,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/12047443/