我正在尝试使用Clojure - Seesaw从文件中读取并将字符串转换为映射(变量),以便我可以使用它们打印到GUI。以下是我目前的代码:
(ns store.core
(:gen-class)
(:require [seesaw.core :as seesaw]))
(defn -main
[& args]
(seesaw/show!
(spit "amovies.txt" "")
;(spit "amovies.txt" (pr-str [{:id 1 :qty 4 :name "movie1" :price 3.50}
; {:id 2 :qty 5 :name "movie2" :price 3.00}]) :append true)
(spit "amovies.txt" "movie: Movie_Name\nprice: 5\nid: 1\nquantity: 2" :append true)
(print (read-string (slurp "amovies.txt")))
(with-open [rdr (reade "amovies.txt")]
(doseq [line (line-seq rdr)]
(println-str line)))
我很难搞清楚如何逐行读取amovies.txt中的字符串,然后用它创建一个映射。期望的输出应该是这样的 电影:Movie_Name 价格:5 id:1 数量:2
但在某种程度上,如果我要说:电影,它会引用电影的名称。
有人可以帮忙吗?感谢所有帮助!
答案 0 :(得分:2)
(def movies-as-map
(let [lines (with-open [rdr (reade "amovies.txt")]
(line-seq rdr))]
(binding [*read-eval* false]
(map read-string lines))))
user> (def movie
(binding [*read-eval* false]
(read-string
"{:id 1 :qty 4 :name \"movie1\" :price 3.50}")))
#'user/movie
user> (keys movie)
(:id :qty :name :price)
(spit "amovies.txt"
(pr-str [{:id 1 :qty 4 :name "movie1" :price 3.50}
{:id 2 :qty 5 :name "movie2" :price 3.00}])
:append true)
(spit "amovies.txt"
"movie: Movie_Name\nprice: 5\nid: 1\nquantity: 2"
:append true)
docs:https://clojure.github.io/clojure/branch-master/clojure.core-api.html#clojure.core/read-string
show!
看起来你向跷跷板/表演传递了大量的论据!
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