Fixed JsonMetaForat and ListValue equality

dataforge-io/src/commonMain/kotlin/hep/dataforge/io/JsonMetaFormat.kt

@@ -32,12 +32,16 @@ object JsonMetaFormat : MetaFormat {
 }
 
 fun Value.toJson(): JsonElement {
-    return when (type) {
+    return if(isList()){
+        JsonArray(list.map { it.toJson() })
+    } else {
+        when (type) {
             ValueType.NUMBER -> JsonPrimitive(number)
             ValueType.STRING -> JsonPrimitive(string)
             ValueType.BOOLEAN -> JsonPrimitive(boolean)
             ValueType.NULL -> JsonNull
         }
+    }
 }
 
 fun Meta.toJson(): JsonObject {

dataforge-io/src/commonTest/kotlin/hep/dataforge/io/MetaFormatTest.kt

@@ -26,6 +26,7 @@ class MetaFormatTest {
             "node" to {
                 "b" to "DDD"
                 "c" to 11.1
+                "array" to doubleArrayOf(1.0,2.0,3.0)
             }
         }
         val string = meta.asString(JsonMetaFormat)

dataforge-meta/src/commonMain/kotlin/hep/dataforge/values/Value.kt

@@ -178,6 +178,22 @@ class ListValue(override val list: List<Value>) : Value {
     override val string: String get() = list.first().string
 
     override fun toString(): String = value.toString()
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (other !is Value) return false
+        val otherList = other.list
+        if (list.size != otherList.size) return false
+
+
+        return (0 until list.size).all { list[it] == otherList[it] }
+    }
+
+    override fun hashCode(): Int {
+        return list.hashCode()
+    }
+
+
 }
 
 /**