replacing \ with : in clojure

Question

(=( (defn sdsu-dna-count[dna-string]

(let [a (group-by identity dna-string)] 

   (zipmap (keys a) (map #(count (second %)) a)))
)

"ATGCTTC")

{\C 2,\G 1,\T 3,\A 1})

I am trying to learn Clojure. I am supposed to write a function that takes one argument, a DNA string, and returns a map that indicates the number of times each of the four characters appears in the DNA string. I want the output to be like this: {A 1 :T 3 :G 1 :C 2} instead of {\C 2,\G 1,\T 3,\A 1}. I know I should be able to do that using format, but I am still not able to get it right. Can anyone help me with this?

\A is the clojure notation for the character "A", if you want another type of data for the keys in the map, you need to convert the type. — noisesmith

Diego Basch Diego Basch · Accepted Answer · 2014-09-27T00:07:59

It looks like you want to convert characters to keywords. Try:

(frequencies (map (comp keyword str) dna-string))

replacing \ with : in clojure

1 Answers