[英]Sort rails hash based on array of items
我有一个像这样的数组:
['one','three','two','four']
我有这样的哈希数组:
[{'three' => {..some data here..} }, {'two' => {..some data here..} }, {:total => some_total }] # etc...
我想按第一个数组对哈希数组进行排序。 我知道我可以做:
array_of_hashes.sort_by{|k,v| k.to_s} to sort them and it will sort by the key
(以及将.to_s转换成字符串的.to_s)
我怎样才能做到这一点?
编辑:
我不知道该如何设置,实际上是这样的:
{'one' => {:total => 1, :some_other_value => 5}, 'two' => {:total => 2, :some_other_value => 3} }
如果我需要提出一个新问题,请告诉我,我会做的。
谢谢
与ctcherry答案相似,但使用sort_by。
sort_arr = ['one','three','two','four']
hash_arr = [{'three' => {..some data here..} }, {'two' => {..some data here..} }]
hash_arr.sort_by { |h| sort_arr.index(h.keys.first) }
在这种情况下,Array的index
方法是您的朋友:
sort_list = ['one','three','two','four']
data_list = [{'three' => { :test => 3 } }, {'two' => { :test => 2 } }, {'one' => { :test => 1 } }, {'four' => { :test => 4 } }]
puts data_list.sort { |a,b|
sort_list.index(a.keys.first) <=> sort_list.index(b.keys.first)
}.inspect
结果与源数组的顺序相同:
[{"one"=>{:test=>1}}, {"three"=>{:test=>3}}, {"two"=>{:test=>2}}, {"four"=>{:test=>4}}]
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