More slight streamlining

days/02.go

@@ -7,19 +7,19 @@ import (
 )
 
 type Day02 struct {
-	program []int64
+	program utilities.IntcodeProgram
 }
 
 func (d *Day02) Parse() {
-	d.program = utilities.ParseIntcodeProgram(utilities.GetStringContents("02p"))
+	d.program = utilities.LoadIntcodeProgram("02p")
 }
 
 func (d Day02) Num() int {
 	return 2
 }
 
-func (d *Day02) getProgramWithParams(param1, param2 int64) []int64 {
-	program := make([]int64, len(d.program))
+func (d *Day02) getProgramWithParams(param1, param2 int64) utilities.IntcodeProgram {
+	program := make(utilities.IntcodeProgram, len(d.program))
 	copy(program, d.program)
 	program[1] = param1
 	program[2] = param2

utilities/intcode.go

@@ -11,9 +11,11 @@ const (
 	opEnd = 99
 )
 
-func ParseIntcodeProgram(programStr string) []int64 {
+type IntcodeProgram []int64
+
+func ParseIntcodeProgram(programStr string) IntcodeProgram {
 	nums := strings.Split(programStr, ",")
-	program := make([]int64, len(nums))
+	program := make(IntcodeProgram, len(nums))
 	for idx, num := range nums {
 		iNum, err := strconv.ParseInt(num, 10, 64)
 		if err != nil {
@@ -25,7 +27,7 @@ func ParseIntcodeProgram(programStr string) []int64 {
 	return program
 }
 
-func RunIntcodeProgram(program []int64) {
+func RunIntcodeProgram(program IntcodeProgram) {
 	for instructionPointer := 0; instructionPointer < len(program); {
 		opcode := program[instructionPointer]
 		switch opcode {

utilities/parsing.go

@@ -24,6 +24,11 @@ func getData(filename string, lineHandler func(line string)) {
 	}
 }
 
+func LoadIntcodeProgram(filename string) IntcodeProgram {
+	programStr := GetStringContents(filename)
+	return ParseIntcodeProgram(programStr)
+}
+
 func GetStringContents(filename string) string {
 	var retval string
 	getData(filename, func(line string) {