Go Systems Programming

Printing all the values from a given column of a line

This is a very common scenario, as you often will need to get all the data from a given column of a structured text file in order to analyze it afterward. The code of readColumn.go, which prints values in the third column, will be presented in two parts.

The first part is as follows:

package main 
 
import ( 
   "fmt" 
   "strings" 
) 
 
func main() { 
   var s [3]string 
   s[0] = "1 2 3" 
   s[1] = "11 12 13 14 15 16" 
   s[2] = "-1 2 -3 -4 -5 6" 

Here, you import the required Go packages and define a string with three lines using an array with three elements.

The second part contains the following Go code:

 column := 2 for i := 0; i < len(s); i++ { data := strings.Fields(s[i]) if len(data) >= column { fmt.Println((data[column-1])) ...