Question

我正在做一个我正在从Riot Games API解析JSON的项目，我遇到了麻烦。我对此很陌生，所以忍受我：

API返回JSON，例如：

{"forcinit":{"id":35979437,"name":"F O R C I N it","profileIconId":576,"summonerLevel":30,"revisionDate":1427753158000}}

在我的代码中，我有以下内容：

#lang racket

(require 
 racket/gui/base
 net/url
 json
 racket/format
)

; --- Query API
(define api-request "https://na.api.pvp.net/api/lol/na/v1.4/summoner/by-name/SUMMONER_NAME?api_key=8864143b-a987-45a8-b49d-53c0a7677100")
(define (query-for-summoner name)
  (define summoner-request (string->url (string-replace api-request "SUMMONER_NAME" name)))

  ; Define request parameters, setup for output
  (define sh (get-pure-port summoner-request #:redirections 5))
  (define summoner-hash-str (port->string sh))
  (define summoner-hash-json (string->jsexpr summoner-hash-str))


  (define summoner (hash-ref summoner-hash-json name))
  ;I can't figure out how to make it so the "name" in the above line gets evaluted to the input, but read in as a literal 
  ;in order for it to correctly be identified for the hash. as of now, for example if i type in "Dyrus" in the gui box
  ; it says
  ;hash-ref: no value found for key
  ;key: "Dyrus"
  ;yet if i replace name with 'dyrus it works correctly.
  ;If you know of a way to take a variable and have racket read it as a literal, I would love to hear it.
  ;I've tried serching the documentation and googling but I can't seem to find what I'm looking for.

  (define summoner-id    (hash-ref summoner 'id))
  (define summoner-name  (hash-ref summoner 'name))
  (define summoner-icon  (hash-ref summoner 'profileIconId))
  (define summoner-level (hash-ref summoner 'summonerLevel))

  (printf "Results for: ~a\n" summoner-name)
  (printf "- ID: ~a\n" summoner-id)
  (printf "- Icon ID: ~a\n" summoner-icon)
  (printf "- Level: ~a\n" summoner-level)
)

; --- Build Frame
(define frame (new frame% 
 [label "League of Legends Statistics Tracker"]
 [width 300]
 [height 300]))

(send frame show #t)

(define msg (new message% 
 [parent frame]
 [label "Welcome to the LoL Stats Tracker."]))

(define sn-input (new text-field% 
 [parent frame]
 [label "Summoner Name: "]
 [init-value "omithegreat"]
 [callback (lambda(f ev)
             (send f get-value))
             ]))

(define submit-button (new button% 
 [parent frame]
 [label "Search"]
 [callback (lambda (button event)
             (let ([v (send sn-input get-value)])
               (query-for-summoner v))
             (send msg set-label "Searching for user..."))]))

我编辑了我的riot API私钥;当我用gui框中的任何名称替换name时，代码工作正常，例如，如果我搜索dyrus，并且我替换“（define summoner（hash-ref summoner-hash-json name））” 同（定义召唤师（hash-ref summoner-hash-json'dyrus））

它工作正常。有没有办法可以输入名称，然后将名称字符串转换成文字，就像带有'infront的相同字符串？

Answer 1

好的，我认为Dan D.应该简单地将他的评论作为答案发布：

我（也）认为你正在寻找

string->symbol

（如果你赞成这一点，你也应该赞成Dan D。的评论，上面......）

球拍字符串到字面？

1 个答案: