我有以下哈希:
{
"subtype"=>"example subtype",
"contributors"=> {
"Concept"=>["Example Contributor", "Example Contributor"],
"Editor"=>["Example Contributor", "Example Contributor"],
"Photographer"=>["Example"]
},
"publisher"=>"Example Publisher",
"language"=>"Example Language",
"dimensions"=>"Example Dimensions"
}
在哪里可以看到它是散列的散列,有些具有字符串值,而有些则具有数组值。我想知道如何迭代这个数组,以便我可以得到以下输出,例如html:
<h3>example subtype</h3>
<h3>Concept</h3>
<p>Example Contributor, Example Contributor</p>
<h3>Editor</h3>
<p>Example Contributor, Example Contributor</p>
<h3>Photographer</h3>
<p>Example</p>
<h3>Publisher</h3>
<p>Example Publisher</p>
<h3>Language</h3>
<p>Example Language</p>
<h3>Dimensions</h3>
<p>Example Dimensions</p>
到目前为止,我正在尝试遍历数组,因此遵循this answer(haml):
- object_details.each do |key, value|
%h3= key
- value.each do |v|
%p= v
当然第一项subtype
没有方法each
因为它不是数组而立即失败。
我会手动获取每个值,但如果值存在或不存在(例如,发布者或语言可能并不总是存在于哈希值中),则哈希值可能会发生变化
除了手动检查每个哈希的存在外,是否有一种智能方法来迭代这个哈希值?
答案 0 :(得分:2)
正如@dax提到的那样,也许更清洁:
- object_details.each do |key, value|
%h3= key
%p= Array(value).join(', ')
我希望有帮助
更正!我没有看到嵌套的哈希。你可以做这样的事情(在帮手中)
def headers_and_paragraphs(hash)
hash.each do |k, v|
if v.kind_of?(Hash)
headers_and_paragraphs(v)
else
puts "h3: #{k}" # Replace that with content_tag or something similar
puts "p: #{Array(v).join(', ')}" # Replace that with content_tag or something similar
end
end
end
答案 1 :(得分:1)
- object_details.each do |key, value|
%h3= key
- if value.kind_of?(Array)
-value.each do |v|
%p= v
- else
%p= v
答案 2 :(得分:1)
$modifiedContent = []
def convert(hash)
hash.each do |key, value|
unless (value.kind_of?(Hash))
unless (value.is_a? String and hash.first.first.eql? key and hash.first.last.eql? value)
$modifiedContent << "<h3>#{key}</h3>"
$modifiedContent << "<p>#{Array(value).join(', ')}</p>"
else
$modifiedContent << "<p>#{value}</p>"
end
else
convert(value)
end
$modifiedContent << ""
end
end
myHash = {
"subtype"=>"example subtype",
"contributors"=> {
"Concept"=>["Example Contributor", "Example Contributor"],
"Editor"=>["Example Contributor", "Example Contributor"],
"Photographer"=>["Example"]
},
"publisher"=>"Example Publisher",
"language"=>"Example Language",
"dimensions"=>"Example Dimensions"
}
convert(myHash)
puts $modifiedContent