如何使用Golang自定义扫描程序字符串文字并扩展内存以将整个文件

我希望程序解析引用文件并随机选择3个引号来显示和标准输出.

文件中有1022个引号.

当我尝试拆分文件时,我收到此错误：
?失踪 ‘

我似乎无法弄清楚如何使用字符串文字分配$$,我不断得到：
????失踪 ‘

这是自定义扫描仪：

onDollarSign := func(data []byte,atEOF bool) (advance int,token []byte,err error) {  
    for i := 0; i < len(data); i++ { 
        //if data[i] == "$$" {              # this is what I did originally
        //if data[i:i+2] == "$$" {    # (mismatched types []byte and string)
        //if data[i:i+2] == `$$` {    # throws (mismatched types []byte and string)
        // below throws syntax error: unexpected $AND missing '
        if data[1:i+2] == '$$' {   
            return i + 1,data[:i],nil  
        }  
    }

如果我只使用一个$,字符串文字工作正常.

由于某种原因,只有71个引号被加载到引号切片中.我不知道如何扩展.允许所有1022引号存储在内存中.

我一直在努力想弄清楚如何做到这一点.这就是我现在所拥有的：

package main
import (  
    "bufio"  
    "fmt"  
    "log"  
    "math/rand"  
    "os"  
    "time"  
)  

func main() {  
    rand.Seed(time.Now().UnixNano()) // Try changing this number!  
    quote_file,err := os.Open("/Users/bryan/Dropbox/quotes_file.txt")  
    if err != nil {  
        log.Fatal(err)  
    }  
    scanner := bufio.NewScanner(quote_file)  
    // define split function  
    onDollarSign := func(data []byte,err error) {  
        for i := 0; i < len(data); i++ {  
            if data[i] == '$$' {  
                return i + 1,nil  
            }  
        }  
        fmt.Print(data)  
        return 0,data,bufio.ErrFinalToken  
    }  
    scanner.Split(onDollarSign)  
    var quotes []string  

    // I think this will scan the file and append all the parsed quotes into quotes  
    for scanner.Scan() {  
        quotes = append(quotes,scanner.Text())  

    }  
    if err := scanner.Err(); err != nil {  
        fmt.Fprintln(os.Stderr,"reading input:",err)  
    }  
    fmt.Print(len(quotes))  
    fmt.Println("quote 1:",quotes[rand.Intn(len(quotes))])  
    fmt.Println("quote 2:",quotes[rand.Intn(len(quotes))])  
    fmt.Println("quote 3:",quotes[rand.Intn(len(quotes))])  
}