[英]How to iterate through a yaml hash structure in ruby?
I have a hash mapping in my yaml file as below. 我在我的yaml文件中有一个哈希映射,如下所示。 How Can I iterate through it in simple ruby script? 我如何在简单的ruby脚本中迭代它? I would like to store the key in a variable and value in another variable in my ruby program during the iteration. 我希望在迭代期间将键存储在我的ruby程序中的另一个变量中的变量和值中。
source_and_target_cols_map:
-
com_id: community_id
report_dt: note_date
sitesection: site_section
visitor_cnt: visitors
visit_cnt: visits
view_cnt: views
new_visitor_cnt: new_visitors
the way i am getting the data from the yaml file is below: 我从yaml文件获取数据的方式如下:
#!/usr/bin/env ruby
require 'yaml'
config_options = YAML.load_file(file_name)
@source_and_target_cols_map = config_options['source_and_target_cols_map']
puts @source_and_target_cols_map
The YAML.load_file method should return a ruby hash, so you can iterate over it in the same way you would normally, using the each method: YAML.load_file方法应返回一个ruby哈希,因此您可以使用每种方法以与通常相同的方式迭代它:
require 'yaml'
config_options = YAML.load_file(file_name)
config_options.each do |key, value|
# do whatever you want with key and value here
end
As per your yaml
file it you should get the below Hash
from the line config_options = YAML.load_file(file_name)
根据你的yaml
文件,你应该从行config_options = YAML.load_file(file_name)
获得以下Hash
config_options = { 'source_and_target_cols_map' =>
[ { 'com_id' => 'community_id',
'report_dt' => 'note_date',
'sitesection' => 'site_section',
'visitor_cnt' => 'visitors',
'visit_cnt' => 'visits',
'view_cnt' => 'views',
'new_visitor_cnt' => 'new_visitors' }
]}
Then to iterate through you can take the below approach: 然后迭代你可以采取以下方法:
config_options['source_and_target_cols_map'][0].each {|k,v| key = k,value = v}
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