organizing/adding some useful snippets in go folder

snippets/read-file/input.txt

@@ -0,0 +1,4 @@
+<x=14, y=2, z=8>
+<x=7, y=4, z=10>
+<x=1, y=17, z=16>
+<x=-4, y=-1, z=1>

snippets/read-file/main.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"os"
+	"path/filepath"
+)
+
+func main() {
+	stringSlice := readInputFile("./input.txt")
+	fmt.Println(stringSlice)
+}
+
+// helper function to put the input file into a slice of strings
+// (each elements is a line of the txt file)
+func readInputFile(path string) []string {
+	// var pixelString string
+	resultSlice := make([]string, 0)
+	absPath, _ := filepath.Abs(path)
+
+	file, err := os.Open(absPath)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		line := scanner.Text()
+		// pixelString = line
+		resultSlice = append(resultSlice, line)
+	}
+
+	// return pixelString
+	return resultSlice
+}