Clojure：将哈希映射键字符串转换为关键字吗？ [英] Clojure: Convert hash-maps key strings to keywords?

问题描述

我正在使用Aleph从Redis提取数据：

I'm pulling data from Redis using Aleph:

(apply hash-map @(@r [:hgetall (key-medication id)]))

问题是此数据返回键字符串，对于例如：

The problem is this data comes back with strings for keys, for ex:

({"name" "Tylenol", "how" "instructions"})

当我需要它时：

（{{：name Tylenol，：how instructions}）

({:name "Tylenol", :how "instructions})

我以前是通过以下方式创建新地图的：

I was previously creating a new map via:

{：name（m name），：how（m how）}

{ :name (m "name"), :how (m "how")}

但这对于大量键来说效率很低。

But this is inefficient for a large amount of keys.

如果有函数可以这样做？还是我必须

If there a function that does this? Or do I have to loop through each?

推荐答案

有一个方便的函数，称为关键字，它将字符串转换为适当的关键字：

There is a handy function called keyword that converts Strings into the appropriate keywords:

(keyword "foo")
=> :foo

因此，这只是使用此功能转换地图中所有键的情况。

So it's just a case of transforming all the keys in your map using this function.

我可能会使用列表解析和解构来做到这一点，例如：

I'd probably use a list comprehension with destructuring to do this, something like:

(into {} 
  (for [[k v] my-map] 
    [(keyword k) v]))

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