來自深層嵌套哈希和數組的循環特定值

Question

我是ruby的新手，並且在循環嵌套的哈希和數組時遇到困難。

說我有以下的JSON：

{ 
    "Resume":{ 
       .... data .... 
     }, 
     "StructuredXMLResume":{ 
     "ContactInfo":{ 
       .... data .... 
       } 
      ] 
     }, 
     "EmploymentHistory":{ 
      "EmployerOrg":[ 
       { 
        "EmployerOrgName":"ABC Corp.", 
        "PositionHistory":[ 
        { 
       .... data .... 
        ] 
       }, 
       { 
        "EmployerOrgName":"National Geo.", 
        "PositionHistory":[ 
        { 
      .... data .... 
          } 
         ] 

        } 
        ] 
       } 
      ] 
     } 

。

resume.["Resume"]["StructuredXMLResume"]["EmploymentHistory"]["EmployerOrg"][0]["EmployerOrgName"] 

給我ABC Corp.和

resume.["Resume"]["StructuredXMLResume"]["EmploymentHistory"]["EmployerOrg"][1]["EmployerOrgName"] 

給我National Geo.

如何循環打印每EmployerOrgName？

Answer 1

用途：

resume.["Resume"]["StructuredXMLResume"]["EmploymentHistory"]["EmployerOrg"].each do |employer_org| 
    puts employer_org["EmployerOrgName"] # or whatever you want to do with the employer_org hash 
end 

Answer 2

您可以使用一個枚舉，像每一個，任何「東西」，要麼是或表現得像一個數組/哈希對象，所以在這種情況下，你會想：

all_employerorgs = resume.["Resume"]["StructuredXMLResume"]["EmploymentHistory"]["EmployerOrg"] 
# which is an array of hashes that then you can iterate through 
# you could iterate directly on that but for readibility 
# I would always assign it to a var 
all_employerorgs.each do |employerorg| 
    puts employerorg['EmployerOrgName'] 
end