initial commit

1 files changed, 32 insertions, 0 deletions

diff --git a/model/array.go b/model/array.go
new file mode 100644
index 0000000..b3d2586
--- /dev/null
+++ b/model/array.go
@@ -0,0 +1,32 @@
+package model
+
+import "fmt"
+
+// Index returns node by index from array
+func (n *Node) Index(idx int) (*Node, error) {
+	arrlen := len(n.arrayValue)
+	if idx >= arrlen {
+		return nil, fmt.Errorf("index %d out of range (len=%d)", idx, arrlen)
+	}
+	return n.arrayValue[idx], nil
+}
+
+// SetIndex sets node to array by index
+func (n *Node) SetIndex(idx int, value *Node) error {
+	arrlen := len(n.arrayValue)
+	if idx >= arrlen {
+		return fmt.Errorf("index %d out of range (len=%d)", idx, arrlen)
+	}
+	n.arrayValue[idx] = value
+	return nil
+}
+
+// Each applies callback to each element of array
+func (n *Node) Each(cb func(idx int, value *Node) error) error {
+	for i, v := range n.arrayValue {
+		if err := cb(i, v); err != nil {
+			return err
+		}
+	}
+	return nil
+}