Golang golang-csv2md (snippet)

Go programming example 'golang-csv2md'

golang-csv2md

Golang beginners example: golang-csv2md

package main

import (
    "bufio"
    "encoding/csv"
    "fmt"
    "io"
    "os"
    "strings"
)

func fixedLengthBefore(str string, spacer string, length int) string {
    spacer = spacer[:1]
    l := length - len(str)
    if l > 0 {
        return strings.Repeat(spacer, l) + str
    }
    if l == 0 {
        return str
    }
    return str[:length]
}

func convertCSVtoMD(filename string) string {
    fp, _ := os.Open(filename)

    var row int
    var columnLength = map[int]int{}
    var data = map[int][]string{}

    csvReader := csv.NewReader(bufio.NewReader(fp))
    csvReader.Comma = ';'
    for {
        record, err := csvReader.Read()
        if err == io.EOF {
            break
        }
        for k := range record {
            clen := len(record[k])
            if columnLength[k] < clen {
                columnLength[k] = clen
            }
        }
        data[row] = record
        row++
    }

    var md string
    var mdHeader string
    header := true
    for row = 0; row < len(data); row++ {
        for colKey := range data[row] {
            if colKey != 0 {
                md += "|"
            }
            md += fixedLengthBefore(data[row][colKey], " ", columnLength[colKey])
            if header {
                if colKey != 0 {
                    mdHeader += "|"
                }
                mdHeader += strings.Repeat("-", columnLength[colKey])
            }
        }
        md += "\n"
        if header {
            md += mdHeader + "\n"
            header = false
        }
    }
    return md
}

func main() {
    fmt.Println(convertCSVtoMD("example.csv"))
}

Useful links

• Learn Go: https://golangr.com
• Download Go: https://golang.org