`+'零不能強制到FixNum（TypeError）不會消失

-4

我使用HTTParty連接stockfighter.io的API並獲取股票的報價，然後我提取價格並將其附加到$averageArr陣列的末尾。`+'零不能強制到FixNum（TypeError）不會消失

我試圖平均不斷更新數組的最後五個值，所以我想我會讓一個變量sum將其設置爲零，將最後五個值添加到它，然後除以5得到一個動態和變化的平均值。

這裏是我的代碼：用45行（註釋）

require 'rubygems' 
require 'httparty' 
require 'json' 

apikey = 'API_KEY_FOR_LOGIN_HERE' 
venue = "VENUEX" 
stock = "FOOBAR" 

base_url = "https://api.stockfighter.io/ob/api" 

account = "MY_ACCOUNT_HERE" 

$averageArr = [] 

$counter = 0 

$currAve = 0 


def getQuote(stock, venue, account) 

    response = HTTParty.get("https://api.stockfighter.io/ob/api/venues/#{venue}/stocks/#{stock}/quote") 

    orderbook = response.parsed_response 

    puts orderbook["ok"] 

    return orderbook["last"] 
    puts orderbook["lastTrade"] 

end 


def getAverage(stock, venue, account) 

    $averageArr.push(getQuote(stock, venue, account)) 
    $counter += 1 

    if $counter > 5 

     sum = 0 

     #line 43 
     for i in 1..5 do 
      # this one is line 45 
      sum += $averageArr[$averageArr.count - i] 

     end 


     return sum/5 
     $currAve = sum/5 

    else 

     return 'WAITING FOR QUOTE. CURRENT:' 

    end 
end 


# line 62 
for i in 1..10 do 

    # line 64 
    getAverage(stock, venue, account) 

    if $counter > 5 

     if getQuote(stock, venue, account) < $currAve - 25 and numShares < 999 

      order = { 

        "account" => account, 
        "venue" => venue, 
        "symbol" => stock, 
        "price" => 1, #$250.00 -- probably ludicrously high 
        "qty" => 1, 
        "direction" => "buy", 
        "orderType" => "market" # See the order docs for what a limit order is 

        } 

      response = HTTParty.post("#{base_url}/venues/#{venue}/stocks/#{stock}/orders", 
            :body => JSON.dump(order), 
            :headers => {"X-Starfighter-Authorization" => apikey} 
            ) 

     elsif getQuote(stock, venue, account) > $currAve + 25 and numShares > 0 

      order = { 

        "account" => account, 
        "venue" => venue, 
        "symbol" => stock, 
        "price" => 1, #$250.00 -- probably ludicrously high 
        "qty" => 1, 
        "direction" => "sell", 
        "orderType" => "market" # See the order docs for what a limit order is 

        } 

      response = HTTParty.post("#{base_url}/venues/#{venue}/stocks/#{stock}/orders", 
            :body => JSON.dump(order), 
            :headers => {"X-Starfighter-Authorization" => apikey} 
            ) 

     end 
    end 
end

我一直有困難，我在其中得到有關FixNum和nil錯誤：

/Users/kaichristensen/Dropbox/Kai/Stockfighter/level_three_selling.rb:45:in `+': nil can't be coerced into Fixnum (TypeError) 
from /Users/kaichristensen/Dropbox/Kai/Stockfighter/level_three_selling.rb:45:in `block in getAverage' 
from /Users/kaichristensen/Dropbox/Kai/Stockfighter/level_three_selling.rb:43:in `each' 
from /Users/kaichristensen/Dropbox/Kai/Stockfighter/level_three_selling.rb:43:in `getAverage' 
from /Users/kaichristensen/Dropbox/Kai/Stockfighter/level_three_selling.rb:64:in `block in <main>' 
from /Users/kaichristensen/Dropbox/Kai/Stockfighter/level_three_selling.rb:62:in `each' 
from /Users/kaichristensen/Dropbox/Kai/Stockfighter/level_three_selling.rb:62:in `<main>'

我可能會嘗試訪問和索引超出範圍在陣列上，但這似乎不是問題。任何幫助，將不勝感激。

來源

2016-01-20 Kai Christensen

代碼有很多錯誤。爲了消除這個錯誤，你可以在這行尾加上''.to_i''，就像這樣：''averageArr.last.to_i''。打賭這對你沒有多大幫助。 –

謝謝！我會試試這個！ –

@lurker看看前一行。 'puts''永遠不會被調用。 –

你的語法很好。問題是你的方法沒有驗證數據。

a += b擴大爲a = a + b，當b爲nil時，會出現您遇到的錯誤。

您需要確保getQuote總是返回一個數字，或者在執行數學運算之前將您想要平均的任何數據轉換爲數字。

對於前者，你可以改變return orderbook["last"]到return orderbook["last"].to_f

對於後者，sum += $averageArr[$averageArr.count - i].to_f

來源

2016-01-20 17:29:09 fylooi

`+'零不能強制到FixNum（TypeError）不會消失

回答

相關問題