diff --git a/etk/tool.cpp b/etk/tool.cpp
index 7bd7bda..4cc3f5f 100644
--- a/etk/tool.cpp
+++ b/etk/tool.cpp
@@ -25,6 +25,26 @@ int32_t etk::tool::irand(int32_t a, int32_t b)
 	return (int32_t)(( rand()/(float)RAND_MAX ) * ((float)b-(float)a) + (float)a);
 }
 
+void etk::tool::frandTable(float a, float b, int32_t size, float* table)
+{
+	if (NULL==table) {
+		return;
+	}
+	for(int32_t iii=0; iii<size; iii++) {
+		table[iii] = frand(a, b);
+	}
+}
+
+void etk::tool::irandTable(int32_t a, int32_t b, int32_t size, int32_t* table)
+{
+	if (NULL==table) {
+		return;
+	}
+	for(int32_t iii=0; iii<size; iii++) {
+		table[iii] = frand(a, b);
+	}
+}
+
 
 void etk::tool::SortList(etk::Vector<etk::UString *> &m_listDirectory)
 {
diff --git a/etk/tool.h b/etk/tool.h
index 98bf779..66fd135 100644
--- a/etk/tool.h
+++ b/etk/tool.h
@@ -16,9 +16,13 @@ namespace etk {
 	namespace tool {
 		float   frand(float a, float b);
 		int32_t irand(int32_t a, int32_t b);
+		void    frandTable(float a, float b, int32_t size, float* table);
+		void    irandTable(int32_t a, int32_t b, int32_t size, int32_t* table);
+		
 		void SortList(etk::Vector<etk::UString *> &m_listDirectory);
 		bool strnCmpNoCase(const char * input1, const char * input2, int32_t maxLen);
 		etk::UString SimplifyPath(etk::UString input);
+		
 	};
 };