2020 Day 19 & 20 Complete

helpers/coordinate.go

@@ -14,6 +14,10 @@ func NewCoordinate(x, y int) *Coordinate {
 	return &Coordinate{x, y}
 }
 
+func (c Coordinate) Relative(t Coordinate) Coordinate {
+	return Coordinate{X: c.X + t.X, Y: c.Y + t.Y}
+}
+
 func (c *Coordinate) North() Coordinate {
 	return Coordinate{X: c.X, Y: c.Y - 1}
 }

helpers/helpers.go

@@ -263,6 +263,25 @@ func StringSliceContains(h []string, n string) bool {
 	return false
 }
 
+// IntSliceContains takes an int slice and an int and return true
+// if the int is in the slice
+func IntSliceContains(h []int, n int) bool {
+	for _, v := range h {
+		if v == n {
+			return true
+		}
+	}
+	return false
+}
+
+// AppendString returns a slice of strings that are base+group[...]
+func AppendStrings(base string, group []string) []string {
+	for k, v := range group {
+		group[k] = base + v
+	}
+	return group
+}
+
 // IsPrime takes a number and return true if that number is prime
 func IsPrime(value int) bool {
 	for i := 2; i <= int(math.Floor(float64(value)/2)); i++ {