Golang : Find the longest line of text example




Ability to find the longest find in a given text file can be useful in a situation where you want to pre-process a raw data file. For example, you want to find the longest line and then word wrap or line break the longest line before actually processing the data.

Here you go!


 package main

 import (
 "fmt"
 "strings"
 )

 func longestLine(input string) (longest string) {
 lines := strings.Split(input, "\n")

 size := 0

 for _, v := range lines {
 //fmt.Println(k,v, "Size: ", len(v))

 if len(v) >= size {
 longest = v
 size = len(v)
 }
 }
 return
 }

 func main() {
 text := `line 1
 line 2 line 3 line 4
 line 5 line 6 line 7 line 8 line 9 line 10
 line 11 line 12
 line 13 line 14 line 15`

 //fmt.Println(text)

 // find the longest line in text and display it
 fmt.Println("Longest: ", longestLine(text))
 }

Output:

Longest: line 5 line 6 line 7 line 8 line 9 line 10

Happy coding!

  See also : Golang : Convert lines of string into list for delete and insert operation





By Adam Ng

IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.


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