使用虚线路径密钥字符串访问Ruby哈希 [英] Access Ruby Hash Using Dotted Path Key String
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问题描述
t('one.two.three.four')
有谁知道如何用Ruby哈希做到这一点?或者只能直接通过YAML对象?
解决方案
只需在路径中的一个点上分割并遍历它就可以找到正确的散列?
path.split(。)。inject(hash){| hash,key |另外,你可以通过在整个结构上迭代迭代来构建一个新的散列: >
$ b
def convert_hash(hash,path =)
hash.each_with_object({})do |(k,v ),ret |
key =路径+ k
如果v.is_a?哈希
ret.merge! convert_hash(v,key +。)
else
ret [key] = v
end
end
end
The Rails I18n library transforms a YAML file into a data structure that is accessible via a dotted path call using the t() function.
t('one.two.three.four')
Does anyone know how to do this with a Ruby Hash? Or is it only possible directly via a YAML object?
解决方案 Just split on a dot in the path and iterate over this to find the right hash?
path.split(".").inject(hash) { |hash, key| hash[key] }
Alternatively you can build a new hash by iterating recursively over the whole structure:
def convert_hash(hash, path = "")
hash.each_with_object({}) do |(k, v), ret|
key = path + k
if v.is_a? Hash
ret.merge! convert_hash(v, key + ".")
else
ret[key] = v
end
end
end
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