initial import

core/stringx/node.go

@@ -0,0 +1,32 @@
+package stringx
+
+type node struct {
+	children map[rune]*node
+	end      bool
+}
+
+func (n *node) add(word string) {
+	chars := []rune(word)
+	if len(chars) == 0 {
+		return
+	}
+
+	nd := n
+	for _, char := range chars {
+		if nd.children == nil {
+			child := new(node)
+			nd.children = map[rune]*node{
+				char: child,
+			}
+			nd = child
+		} else if child, ok := nd.children[char]; ok {
+			nd = child
+		} else {
+			child := new(node)
+			nd.children[char] = child
+			nd = child
+		}
+	}
+
+	nd.end = true
+}