Question

我正试图在大海捞针中找到针头。我已经收到了带有两个值和键的字典。

ruby haystack.rb

{"haystack"=>["D0zVh", "F1PFc", "j1WMn", "Ebz3k", "SE7gZ", "kOa7j", "0vCJb", "px18q", "NJSyl", "nRsOK", "T7t8F", "2jvwZ", "5414s", "q5z8U", "TI2Zm", "v4Bn9", "5dRcM", "M84vp", "8nQ0o", "OxEKw"], "needle"=>"v4Bn9"}

第一个值needle是字符串。第二个值haystack是一个字符串数组。下一步是告诉API针在大海捞针阵列中的位置。

我需要将结果发布到＆＃34; api / validateneedle＆＃34;，使用我的令牌的密钥令牌，以及表示针位于haystack数组中的整数的关键针。

当我运行此文件时，出现以下错误：

haystack.rb:59:in `<main>': undefined local variable or method `token' for main:Object (NameError)

任何人都可以告诉我为什么我收到此错误消息？我非常感谢任何帮助/反馈！

token_info = {:token => "SVilLuY0OU"}

require 'net/http'

http = Net::HTTP.new("challenge.code2040.org")

# Sending json in body of http request
# Creating a request that will use the post http method 

require "json"

body = token_info.to_json

request = Net::HTTP::Post.new("/api/haystack")

# Setting the request body to be our json
request.body = body

# Storing my token in a variable
response = http.request(request)


# Printing my token to complete rest of assignment  
#Printing the body of the response
response_hash = JSON.parse(response.body)

puts response_hash["result"]

def getIndex(response)

    needle = response["result"]["needle"]
    haystack = response["result"]["haystack"]

    i = 0
    while i < haystack.length

        # if we find it, break the loop and return i
        if haystack[i] == needle
            return i.to_s
    end

    i += 1

end

    return "not found"

end

def sendIndex(token)
    response = getItems(token)
    index = getIndex(response)
    params = {'token' => token, 'needle' => index}
    request = Net::HTTP::Post.new("/api/validateneedle")

end

sendIndex(token)

Answer 1

错误消息不言自明：在第59行，您将参数token传递给方法sendIndex，但token未定义，既不是方法也不是作为一个局部变量。

错误：未定义的局部变量或方法'foo'表示main：Object（NameError）

1 个答案: