69 lines
1.3 KiB
Go
69 lines
1.3 KiB
Go
// Copyright © 2018 Inanc Gumus
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// Learn Go Programming Course
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// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
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//
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// For more tutorials : https://learngoprogramming.com
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// In-person training : https://www.linkedin.com/in/inancgumus/
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// Follow me on twitter: https://twitter.com/inancgumus
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package main
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import (
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"fmt"
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"os"
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"strings"
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)
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func main() {
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const (
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data = `Location,Size,Beds,Baths,Price
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New York,100,2,1,100000
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New York,150,3,2,200000
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Paris,200,4,3,400000
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Istanbul,500,10,5,1000000`
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separator = ","
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)
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// parse the data
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rows := strings.Split(data, "\n")
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cols := strings.Split(rows[0], separator)
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// default case: slice for all the columns
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from, to := 0, len(cols)
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// find the from and to positions depending on the command-line arguments
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args := os.Args[1:]
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for i, v := range cols {
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l := len(args)
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if l >= 1 && v == args[0] {
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from = i
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}
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if l == 2 && v == args[1] {
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to = i + 1 // +1 because the stopping index is a position
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}
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}
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// "from" cannot be greater than or equal to "to": reset invalid arg to 0
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if from >= to {
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from = 0
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}
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for i, row := range rows {
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cols := strings.Split(row, separator)
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// print only the requested columns
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for _, h := range cols[from:to] {
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fmt.Printf("%-15s", h)
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}
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fmt.Println()
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// print extra new line for the header
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if i == 0 {
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fmt.Println()
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}
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}
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}
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