CS245

Baby names in Go

• Readability of the code
• Writability of the code
• Changability of the code
• Runtime complexity -- for the data given, this is a minor issue. Suppose you had the top 10,000,000 names for the past 100 years, worldwide.
• How much you hate VSC for developing in Java/Go/Kotlin (and why, be specific)
• How much you hate Kotlin/Go (and why ... be specific)

Reading CSV data from a URL in Go

package main

import (
    "encoding/csv"
    "fmt"
    "io"
    "net/http"
    "os"
    "strconv"
    "strings"
)

func readHurricane(url string, maxLines int) {
    resp, err := http.Get(url)
    if err != nil {
        fmt.Println("Http problem", err)
        return
    }
    body, err := io.ReadAll(resp.Body)
    resp.Body.Close()
    if err != nil {
        fmt.Println("Http problem2", err)
        return
    }
    str := string(body)
    r := csv.NewReader(strings.NewReader(str))
    r.FieldsPerRecord = -1

    obsCount := -1
    aCount := 0
    for i := 0; i < maxLines || maxLines <= 0; i++ {
        record, err := r.Read()
        if err == io.EOF {
            break
        }
        if err != nil {
            fmt.Fprintf(os.Stderr, "%v\n", err)
            break
        }
        if len(record) < 5 {
            fmt.Printf("NAME: %v\n", record)
            obsCount, err = strconv.Atoi(strings.TrimSpace(record[2]))
            if err != nil {
                fmt.Fprintf(os.Stdout, "CONV PROB [[%v]]  %v\n", record[2], err)
            }
            aCount = 0
        } else {
            aCount++
            fmt.Printf("OBSE %d %d: %v\n", obsCount, aCount, record)
        }
    }
    return
}

func main() {
    readHurricane("http://cs.brynmawr.edu/~gtowell/Data/hurdat2-1851-2019-052520.txt", 100)
}    

Grading

What to hand in

• All Go code
• The usual README
• A script file swhoing the output of your go program on the following names: Aaron, Devon,marlen,syd
• Your opinion piece on the relative merits of Go and Kotlin. I would prefer this in .txt format (like the readme). I will also accept pdf. I may read other formats, but I will not be happy. Do not give me a link for a file stored elsewhere

Electronic Submissions

Your submission will be handed in using the submit script.

If you write your program on computers other than those in the lab, be aware that your program will be graded based on how it runs on the department’s Linux server, not how it runs on your computer. The most likely problem is not submitting everything or hard coding file locations that are not correct on the Linux servers.

The submission should include the following items:

README:

This file should follow the format of this sample README

Source files

All of them (you might have only one)

Data files used:

Be sure to include any non-standard data files uses. You should not have any.

Script file

Include with your submission the output from your program on the following names: aa, Dev, sy, michelle

DO NOT INCLUDE:

Data files that are read from the class site.

Again: Once you have everything you want to submit in the a5 directory within /home/YOU/cs245/

1. Go to the directory /home/YOU/cs245
2. Enter /home/gtowell/bin/submit -c 245 -p 5 -d a5