hi,
I have 2 report files in JSON format like below:
# file 1: a.json
{ "abcdef" : { "value" : "10" }
# file 2: b.json
{ "abcdef" : { "value" : "20" }
I am using clojure.contrib.json to read each file, and I want a
function that takes in the 2 structures and a metric name (e.g.
abcdef). The function will then look up abcdef in each structure,
find the value of each, and compute the difference. I am running into
an issue, however, that the function needs to take in a string (e.g.
"abcdef") but convert this to a keyword (e.g. :abcdef ).
Thus I am looking for the opposite of as-str in
clojure.contrib.string, i.e. something that takes a string and creates
a keyword.
Or perhaps there is a better way?
This is what I have so far:
(use 'clojure.contrib.json)
(import 'java.io.FileReader)
(def report1 (clojure.contrib.json/read-json (FileReader.
"a.json" )) )
(def report2 (clojure.contrib.json/read-json (FileReader.
"b.json" )) )
;; Seek out the values from report1 and report2 for the metric desired
( e.g. :abcdef), and
;; compute the difference
;;-----------------------------------------------------------------------------
(defn compute-metric-diff [ json1 json2 :metric ]
(- (:value (json1 :metric )) (:value (json2 :metric))))
user=> (defn compute-metric-diff [ json1 json2 :metric ]
(- (:value (json1 :metric )) (:value (json2 :metric))))
java.lang.Exception: Unsupported binding form: :metric (NO_SOURCE_FILE:
58)
;; I want to be able to call it like so
(compute-metric-diff report1 report2 "abcdef" )
Any help appreciated.
Many thanks,
Avram
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