initial commit

pkg/array/aggregate.go

@@ -0,0 +1,26 @@
+package array
+
+func Chunk[T interface{}](arr []T, chunkSize int) [][]T {
+	var chunkedArray [][]T
+
+	for i := 0; i < len(arr); i += chunkSize {
+		end := i + chunkSize
+
+		if end > len(arr) {
+			end = len(arr)
+		}
+
+		chunkedArray = append(chunkedArray, arr[i:end])
+	}
+
+	return chunkedArray
+}
+
+func Sum[T any, N Numbers](arr []T, selector func(val T) N) N {
+	var summed N
+	for i := 0; i < len(arr); i++ {
+		r := selector(arr[i])
+		summed += r
+	}
+	return summed
+}