如何用reduce-kv和assoc将Map转换为Map数组？

Got it, let's get this sorted for you! You're absolutely on the right path with reduce-kv—the main tweak needed is how you build up the resulting vector instead of trying to merge maps into it. Here's the working code:

(reduce-kv
  (fn [acc k v]
    (conj acc {:newKey1 k :newKey2 v}))
  []
  {"keystring1" "valuestring1" "keystring2" "valuestring2"})

Breakdown of what's happening: #

• We start with an empty vector [] as our accumulator—this aligns perfectly with your goal of ending up with an array (vector) of maps.
• For every key-value pair in the original map, we create a new map directly using the shorthand {:newKey1 k :newKey2 v} (no need for multiple assoc calls here, though that would work too if you prefer it).
• conj appends this new map to the accumulator vector—this is the right tool for adding elements to a collection like a vector, unlike merge which is for combining maps together.

What was off in your initial attempt? #

Your original code tried to merge maps into the accumulator, but merge operates on maps, not vectors. Since we're building a list of maps, conj is the correct function to use here to grow the vector incrementally.

If you run the code above, you'll get exactly the output you want:

[{:newKey1 "keystring1", :newKey2 "valuestring1"} {:newKey1 "keystring2", :newKey2 "valuestring2"}]

内容的提问来源于stack exchange，提问作者Jdv