first commit

day-0/files.go

@@ -0,0 +1,36 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+)
+
+func tryMe(e error) {
+	if e != nil {
+		fmt.Println("OH SNAP!")
+		panic(e)
+	}
+}
+
+func files() {
+	dat, err := os.ReadFile("./data.txt")
+	tryMe(err)
+
+	fmt.Print(string(dat))
+	fmt.Println("\n---")
+
+	f, err := os.Open("./data.txt")
+	tryMe(err)
+	coupleBytes := make([]byte, 10)
+	num, err := f.Read(coupleBytes)
+	tryMe(err)
+	fmt.Println(num, string(coupleBytes))
+
+	reader := bufio.NewReader(f)
+	rBuf, err := reader.Peek(5)
+	tryMe(err)
+	fmt.Println("buff reader", string(rBuf))
+
+	f.Close()
+}