func main() {
var est estimation.Estimator
est = new(estimation.TwomomentsChan)
var stdin *bufio.Scanner
stdin = bufio.NewScanner(os.Stdin)
log.Print("Starting to read\n")
//setup file reader
inchan := make(chan float64)
go utils.CatFloat(stdin, inchan)
//output print server
outchan := make(chan string)
go utils.Print(os.Stdout, outchan)
//main loop
var number float64
var ok bool
for {
select {
case number, ok = <-inchan:
if ok {
est.Push(number)
}
}
if !ok {
//the channel has closed no new data is coming
break
}
outchan <- est.String()
}
}
//getInput: Take a filename and return a channel of the floats contained in the file.
func getInput(filename string) (chan float64, error) {
var fp *bufio.Scanner
file, err := os.Open(filename)
if err != nil {
log.Println(file)
}
fp = bufio.NewScanner(file)
log.Printf("Making input channel from file\n")
inchan := make(chan float64)
go utils.CatFloat(fp, inchan)
return inchan, err
}