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I am trying to read a string of data from a csv file and parse the data into a list of custom objects. The main issue that I am having is converting the data to the correct datatype within the loop.

Here is my custom object:

type yahooInfoObj struct {
    date time.Time
    open float32
    high float32
    low float32
    close float32
    volume int
    adjClose float32
}

Here is my function that gets the data and attempts to parse it:

func getSingleCompanyData(search searchObj) []yahooInfoObj {
    searchQuery := buildYahooFinanceDataQueryString(search)
    data := getRequest(searchQuery)

    r := csv.NewReader(strings.NewReader(data))
    var stats []yahooInfoObj

    // Read csv file
    result, _ := r.ReadAll()

    //loop through each returned stat (line)
    for i := range result {
        //skip the first entry due to column names being returned
        if i != 0{
            stat := result[i]
            stats = append(stats, yahooInfoObj{stat[0],strconv.ParseFloat(stat[1],32),strconv.ParseFloat(stat[2],32),strconv.ParseFloat(stat[3],32),strconv.ParseFloat(stat[4],32),strconv.Atoi(stat[5]),strconv.ParseFloat(stat[6],32)})
        }
    }

    return stats
}

Here is some sample data of which would be returned and placed in the data variable:

Date,Open,High,Low,Close,Volume,Adj Close
2010-12-31,31.219999,31.33,30.93,31.299999,11716300,29.517661
2010-12-30,31.450001,31.58,31.209999,31.290001,12989400,29.508232
2010-12-29,31.530001,31.690001,31.42,31.50,9769000,29.706273
2010-12-28,31.66,31.76,31.41,31.57,9736000,29.772287

I am new to the go language and would really appreciate any advice. Thanks in advance!

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1 回答 1

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我马上就注意到了一些事情：

  • 您没有使用time.Time对象发送到您的yahooInfoObj结构。你正在发送一个字符串

  • 您正在调用在“单值上下文”中返回多个值的函数。这意味着您只是希望忽略第二个值，但对于 Go，这是您的编码中的错误。您必须明确设置这些值。

  • 您没有检查多个错误。始终检查错误 - 它将防止将来出现“陷阱”。

这并不完美，但这是一个看似有效的游乐场： https: //play.golang.org/p/idQFFVjS-X

于 2016-02-21T05:24:33.953 回答