本文介绍了展平嵌套的JSON对象的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我在寻找,将展平JSON散列成一个扁平的哈希值,但保持在扁平按键的路径信息的方法。
例如:
H = {A=> 富,B=> [{C=> 酒吧,D=> [巴兹]}]}
扁平化(H)应返回:
{A=> 富,b_0_c=> 酒吧,b_0_d_0=> 巴兹}
解决方案
这应该解决您的问题:
H = {'A'=> '富','B'=> [{'C'=> '酒吧','D'=> ['巴兹']}]}模块可枚举
高清flatten_with_path(PARENT_ preFIX =无)
RES = {} self.each_with_index做| ELEM,我|
如果elem.is_a?(阵列)
K,V = ELEM
其他
K,V = I,ELEM
结束 关键= PARENT_ preFIX? #{PARENT_ preFIX}#[KP}:K#的结果散列指定的键名 如果v.is_a?枚举
res.merge!(v.flatten_with_path(密钥))#递归调用压扁子元素
其他
RES [关键] = V
结束
结束 水库
结束
结束把h.flatten_with_path.inspect
I'm looking for a method that will flatten a "json" hash into a flattened hash but keep the path information in the flattened keys.For example:
h = {"a" => "foo", "b" => [{"c" => "bar", "d" => ["baz"]}]}
flatten(h) should return:
{"a" => "foo", "b_0_c" => "bar", "b_0_d_0" => "baz"}
解决方案
This should solve your problem:
h = {'a' => 'foo', 'b' => [{'c' => 'bar', 'd' => ['baz']}]}
module Enumerable
def flatten_with_path(parent_prefix = nil)
res = {}
self.each_with_index do |elem, i|
if elem.is_a?(Array)
k, v = elem
else
k, v = i, elem
end
key = parent_prefix ? "#{parent_prefix}.#{k}" : k # assign key name for result hash
if v.is_a? Enumerable
res.merge!(v.flatten_with_path(key)) # recursive call to flatten child elements
else
res[key] = v
end
end
res
end
end
puts h.flatten_with_path.inspect
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