ruby extract data from nested array - ruby

Question

How I can access to a depth key value from a nested hash?
I want to extract values inside of _Data, I want to extract the field and size inside data[], to be printed like fieldvalue_sizevalue
elemento3_3
I have this code but only get the all the data keys and values and i had some troubles making this iteration, I am new at ruby
_Data[0][:checks].each do |intera|
puts "#{itera[:data]}
end
this is the nested array
_Data =[
{
"agent": "",
"bottom_comments": [],
"checks": [
{
"title": "new",
"data": [{
"field": "elemento1",
"value": "0",
}
]
},
{
"title": "new",
"data": [{
"field": "elemento2",
"value": "0",
"size":"4",
}
]
},
{
"title": "new",
"data": [{
"field": "elemento3",
"value": "0",
"size":"3",
}
]
},
{
"title": "new",
"data": [{
"field": "elemento4",
"value": "0",
"size":"17",
}
]
},
{
"title": "new",
"data": [{
"field": "elemento5",
"value": "0",
"size":"12",
}
]
},
{
"title": "new",
"data": [{
"field": "elemento6",
"value": "0",
"size":"19",
}
]
},
{
"title": "new",
"data": [{
"field": "elemento7",
"value": "0",
"size":"9",
}
]
},
{
"title": "new",
"data": [{
"field": "elemento8",
"value": "0",
"size":"10",
}
]
},
{
"title": "new",
"data": [{
"field": "elemento11",
"value": "0",
"size":"14",
}
]
},
{
"title": "new",
"data": [{
"field": "elemento19",
"value": "0",
"size":"14",
}
]
},
{
"type": "condiciones",
"elementos": [
{
"table": [
{
"title": "",
"name": "radio",
},
{
"title": "",
"name": "xenon",
},
{
"title": "",
"name": "aluminio",
},
{
"title": "",
"name": "boro",
},
{
"title": "",
"name": "oro",
},
{
"title": "",
"name": "bromo",
},
{
"title": "",
"name": "oxigeno",
}
]
}
]
}
]
}
]

Answer 1

_Data[0][:checks].each do |intera|
intera[:data].each do |data|
puts "#{data[:filed]}_#{data[:value]}"
end
end
Hope this may help you.

Answer 2

Here is one line code to print the values if they exist. Let me know if any further details on any of the methods used will be helpful.
_Data[0][:checks].pluck(:data).flatten.compact.each{|i| puts "#{i[:field]}_#{i[:size]}" if i[:field] && i[:size]}