Исходники и презентации

lessons/functions/filename_like_argument/main.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+	"bufio"
+	"errors"
+	"io"
+	"os"
+)
+
+func ProccessDataInFile(filename string) (string, error) {
+	file, err := os.Open(filename)
+	if err != nil {
+		return "", err
+	}
+
+	var data string
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		// processing...
+	}
+
+	return data, nil
+}
+
+func ProccessData(reader io.Reader) (string, error) {
+	if reader == nil {
+		return "", errors.New("incorrect reader")
+	}
+
+	var data string
+	scanner := bufio.NewScanner(reader)
+	for scanner.Scan() {
+		// processing...
+	}
+
+	return data, nil
+}