Thanks for the tips! Em terça-feira, 3 de abril de 2018 20:39:25 UTC-3, Base escreveu: > > Swap requires an atom as an input. > > https://clojuredocs.org/clojure.core/swap! > > If you are trying to perform swap! on a collection that was just read from > json/read-str then it is probably not an atom, and you would need to > convert it to an atom before doing this. > > However, generally there are specific use cases where you would want to > use an atom (concurrency), but most of the time you would just want to use > a regular data structure unless concurrency is an issue with what you are > doing with the data. > > Read this as well. > > https://clojure.org/reference/atoms > > On Tuesday, April 3, 2018 at 6:24:27 PM UTC-5, Renata Soares wrote: >> >> Good Night, >> >> I have this function: >> >> (defn treat-requests [key-request collection] >> (let [selecteds (filter #((keyword key-request) %) input)] >> (doseq [item selecteds] >> (swap! collection conj item)))) >> >> where input is an output of clojure.data.json/read-str and swap is giving >> this following error: >> >> clojure.lang.PersistentVector cannot be cast to clojure.lang.IAtom >> >> How can I solve it? >> >> Thanks in advance. >> >
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