Implement #254 for a one-D array

include/ArduinoJson/JsonArray.hpp

@@ -161,6 +161,15 @@ class JsonArray : public Internals::JsonPrintable<JsonArray>,
   // Serialize the array to the specified JsonWriter.
   void writeTo(Internals::JsonWriter &writer) const;
 
+  // Extract a C array
+  template <typename T, size_t N>
+  size_t copyTo(T(&destination)[N]) const {
+    size_t i = 0;
+    for (const_iterator it = begin(); it != end() && i < N; ++it)
+      destination[i++] = *it;
+    return i;
+  }
+
  private:
   node_type *getNodeAt(size_t index) const;
 

test/JsonArray_CopyTo_Tests.cpp

@@ -0,0 +1,24 @@
+// Copyright Benoit Blanchon 2014-2016
+// MIT License
+//
+// Arduino JSON library
+// https://github.com/bblanchon/ArduinoJson
+// If you like this project, please add a star!
+
+#include <ArduinoJson.h>
+#include <gtest/gtest.h>
+
+TEST(JsonArray_CopyTo_Tests, OneDimensionIntegerArray) {
+  char json[] = "[1,2,3,4]";
+
+  DynamicJsonBuffer jsonBuffer;
+  JsonArray& array = jsonBuffer.parseArray(json);
+
+  int destination[4];
+  array.copyTo(destination);
+
+  ASSERT_EQ(1, destination[0]);
+  ASSERT_EQ(2, destination[1]);
+  ASSERT_EQ(3, destination[2]);
+  ASSERT_EQ(4, destination[3]);
+}