Add tons of builtin helpers and array operations.

object/builtin_split.go

@@ -0,0 +1,36 @@
+package object
+
+import (
+	"strings"
+)
+
+// Split ...
+func Split(args ...Object) Object {
+	if len(args) < 1 {
+		return newError("wrong number of arguments. got=%d, want=1",
+			len(args))
+	}
+
+	if obj, ok := args[0].(*String); ok {
+		var sep string
+
+		s := obj.Value
+
+		if len(args) == 2 {
+			if obj, ok := args[1].(*String); ok {
+				sep = obj.Value
+			} else {
+				return newError("expected arg #2 to be `str` got=%T", args[1])
+			}
+		}
+
+		tokens := strings.Split(s, sep)
+		elements := make([]Object, len(tokens))
+		for i, token := range tokens {
+			elements[i] = &String{Value: token}
+		}
+		return &Array{Elements: elements}
+	} else {
+		return newError("expected arg #1 to be `str` got got=%T", args[0])
+	}
+}