processing big files in go

bigfile.go

package main

import (
	"bufio"
	"log"
	"os"
)

const BUFF = 1024 * 1024

func read(exp, path string) ([]string, error) {
	var data []string

	file, err := os.Open(path)
	defer file.Close()
	if err != nil {
		return nil, err
	}

	scanner := bufio.NewScanner(file)
	buf := make([]byte, 0, BUFF)
	scanner.Buffer(buf, 10*BUFF)

	if err != nil {
		go log.Println(err)
		return err
	}

	for scanner.Scan() {
		data = append(data, match([]string{scanner.Text()}, exp)...)
	}

	return data, nil
}