以下是破解文档中的示例：
json = '{"posts":[{"title":"Foobar"},{"title":"Another"}]}'
Crack::JSON.parse(json)
=> {"posts"=>[{"title"=>"Foobar"},{"title"=>"Another"}]}
但是,我如何实际访问哈希中的数据？
我尝试过以下方法：
array = Crack::JSON.parse(json) array["posts"]
array [“posts”]显示所有值,但我尝试了数组[“posts”] [“title”]并且它不起作用.
以下是我要解析的例子：
{"companies"=>[{"city"=>"San Mateo","name"=>"Jigsaw","address"=>"777 Mariners Island Blvd Ste 400","zip"=>"94404-5059","country"=>"USA","companyId"=>4427170,"activeContacts"=>168,"graveyarded"=>false,"state"=>"CA"}],"totalHits"=>1}
我想访问公司下的各个元素……比如城市和名字.
解决方法
像这样？
hash = {
"companies" => [
{
"city" => "San Mateo","name" => "Jigsaw","address" => "777 Mariners Island Blvd Ste 400","zip" => "94404-5059","country" => "USA","companyId" => 4427170,"activeContacts" => 168,"graveyarded" => false,"state" => "CA"
}
],"totalHits" => 1
}
hash['companies'].each{ |i|
puts "city => #{i['city']}"
puts "name => #{i['name']}"
}
# >> city => San Mateo
# >> name => Jigsaw
hash['companies'][0]['city'] # => "San Mateo"
hash['companies'][0]['name'] # => "Jigsaw"
问题是你没有考虑公司指向的阵列.