Create seq of maps from two or more seqs

Question

I'm new to Clojure and I was wondering if there's a way to create a sequence of maps from two or more sequences.

Let's say you have:

(def numbers '(1 2 3))
(def letters '("a" "b" "c"))
(def shapes '("circle" "square" "triangle"))

If you merged those I'd like to get what would be an array of hashes in Ruby, or in Clojure a sequence of maps?

({:number 1, :letter "a", :shape "circle"} {:number 2, :letter "b", :shape "square"} {:number 3, :letter "c", :shape "triangle"})

thanks!

score 4 · Accepted Answer · answered Jun 10 '12 at 08:15

4

 (map (fn [n l s] {:number n, :letter l, :shape s})  numbers letters shapes) ;;=> 
 ({:number 1, :letter "a", :shape "circle"} {:number 2, :letter "b", :shape "square"} {:number 3, :letter "c", :shape "triangle"})

answered Jun 10 '12 at 08:15

Michiel Borkent

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1

Haha, we posted exactly the same answer at exactly the same time! I can't do anything but +1 – huon Jun 10 '12 at 08:16
2

Haha, I will +1 yours too, what a co-incidence! :) – Michiel Borkent Jun 10 '12 at 08:17
2

lol, thanks guys, I flipped a coin and @MichielBorkent gets the answer – kreek Jun 10 '12 at 13:24
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A more idiomatic way than coin-flipping: `(rand-nth '[dbaupp michiel-borkent])`. – jbear Jun 11 '12 at 07:58

huon · Answer 2 · 2012-06-10T08:21:45.093

4

I'm sure there is a more idiomatic way to do this, but:

(map (fn [n l s] {:number n, :letter l, :shape s}) numbers letters shapes)

Or even

(map #(do {:number %1, :letter %2, :shape %3}) numbers letters shapes)

edited Jun 10 '12 at 08:21

answered Jun 10 '12 at 08:15

huon

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Create seq of maps from two or more seqs

2 Answers2