Reading strings line by line, or word by word
There are many use cases for processing strings in a stream, such as when dealing with large text or user input. This recipe shows the use of bufio.Scanner for this purpose.
How to do it...
- Use
bufio.Scannerfor reading lines, words, or custom blocks. - Create a
bufio.Scannerinstance - Set the split method
- Read scanned tokens in a for-loop
How it works...
The Scanner works like an iterator – every call to Scan() method will return true if it parsed the next token, or false if there are no more tokens. The token can be obtained by the Text() method:
package main
import (
"bufio"
"fmt"
"strings"
)
const input = `This is a string
that has 3
lines.`
func main() {
lineScanner := bufio.NewScanner(strings.NewReader(input))
line...
