I am studying gremlin. I need to connect gremlin to .net and below is my code:
internal class Program
{
private const string Host = "localhost";
private const int Port = 8182;
private const string NameTraversalSource = "gmodern";
[Obsolete]
private static void Main(string[] args)
{
Console.WriteLine("Start");
Graph graph = new Graph();
var client = new GremlinClient(new GremlinServer(Host, Port));
var g = graph.Traversal().WithRemote(new DriverRemoteConnection(client));
g.AddV("person").Property("name", "marko");
var re = g.V().HasLabel("person").Values<string>("name").ToList();
foreach (var c in re)
{
Console.WriteLine(c);
}
Console.WriteLine("End");
Console.ReadKey();
}
}
I don't know why it doesn't answer the desired result. I added vertex and name property with value of "marko". I need to print it out. But it doesn't print. Why? Help me.
I voted to close this as I thought more details were required, but I think I realize the problem. In many ways the question could be closed as more of a "duplicate" as many Gremlin oriented questions tend to have this answer: You need to iterate your traversal.
The following line does nothing:
g.AddV("person").Property("name", "marko");
All it does is create a traversal (i.e. an Iterator). It does not execute it. To execute you must iterate it with some form of terminal step. Since you are aren't doing anything with the result you should probably use iterate() like:
g.AddV("person").Property("name", "marko").iterate();
Related
I am trying to store an Int32[] Array and bool[] Array to Firebase but it isn't working for me. I have searched on various places, but couldn't find a solution. Can anyone tell me, how one can store an array to Firebase Real-time DB from Unity.
I am using System.Reflection to get all the public static fields of the class UserPrefs.
Here is the code, I am trying to do this job...
System.Type type = typeof(UserPrefs);
FieldInfo[] fields = type.GetFields();
foreach (var field in fields) {
if (user != null)
dbReference.Child("users").Child(user.UserId).Child(field.Name).SetValueAsync(field.GetValue(null));
else
Debug.LogError("There is no user LoggedIn to write...");
}
Above code saves all values other than arrays. Error given on arrays is following:
InvalidCastException: Cannot cast from source type to destination
type.
Firebase.Database.Internal.Utilities.Validation.ValidateWritableObject
(System.Object object)
Any help will be much appreciated...
You need a class like this.
public class MyClass
{
public int[] intArray = new int[10];
}
Then you can write that object to the Firebase like this.
public void WriteArrays()
{
MyClass temp = new MyClass();
for (int i = 0; i < temp.intArray.Length; i++)
{
temp.intArray[i] = i;
}
databaseReference.Child("MyArrayNode").SetRawJsonValueAsync(JsonUtility.ToJson(temp));
}
databaseReference is a reference to your root.
Same way you can do this for your bool[] also.
For a more general solution you can copy the JsonHelper class which was suggested here.
Example usage:
string jsonArray = JsonHelper.ToJsonArray(mySerializeableList);
var nodeToUpdate = this.dbReference.Child("wantedNode");
nodeToUpdate.SetRawJsonValueAsync(jsonArray);
I want to save a list of dialogue items. I made a script called dialogue item which is just one message, I made an array of that so it can be a conversation, and I made a list of that conversation so that I can have multiple conversations.
[SerializeField] public List<DialogueList> dialogue = new List<DialogueList();
So I made this variable of a class named DialogueList, that contains the dialogueitems.
[System.Serializable]
public class DialogueList
{
[SerializeField] public string convoName;
[SerializeField] public int dialogueID;
[SerializeField] public DialogueItem[] dialogues;
}
I want to save these conversations so that I can load them in specific languages in later stages. But for some reason my JSON file is empty when I try to save my variable named dialogue.
string jsonData = JsonUtility.ToJson(dialogue, true);
string _fullPath = "/caroline-dialogue" + ".json";
File.WriteAllText(Application.persistentDataPath + _fullPath, jsonData);
I tried using a different method, that actually works, but it can get really messy.
for (int i = 0; i < dialogue.Count; i++)
{
string jsonData = JsonUtility.ToJson(dialogue[i], true);
string _fullPath = "/caroline-dialogue-" + i + ".json";
File.WriteAllText(Application.persistentDataPath + _fullPath, jsonData);
}
My question is: What am I doing wrong? Am I forgetting something? My guess it that something is wrong with the variable named dialogue, since saving all the dialogueitems with a for loop works.
I hope I explained my problem well enough.
Serialization/deserialization of the arrays or lists is not supported using the JsonUtility. You would need to wrap the list in a serializable class:
[Serializable]
private class DialogueListWrapper
{
public List<DialogueList> objects;
}
I seem to be stuck in a catch 22 situation with the OnInspectorGUI method of Unity's UnityEditor class. I want to name array elements in the inspector for easy editing, currently I'm using, as per the documentation:
public override void OnInspectorGUI()
{
J_Character charScript = (J_Character)target;
charScript.aBaseStats[0] = EditorGUILayout.FloatField("Base Health", charScript.aBaseStats[0]);
}
In my J_Character script I initialise the aBaseStats array like so:
public float[] aBaseStats = new float[35];
The problem is that whenever I try to do anything in the editor (and thus OnInspectorGUI is called) I get an index out of range error pointing to the line
charScript.aBaseStats[0] = EditorGUILayout.FloatField("Base Health", charScript.aBaseStats[0]);
I'm guessing this is because my array is initialized on game start while the editor code is running all the time while developing.
How can I get round this situation?
Many thanks.
You have to initialize aBaseStats in an function that runs only once.
The code below is BAD:
public float[] aBaseStats = new float[35];
void Start(){
}
The code below is GOOD:
public float[] aBaseStats;
void Start(){
aBaseStats = new float[35];
}
Initialize it in an Editor callback function that runs once.
EDIT:
I don't know a Start callback function that will run before the OnInspectorGUI function(). The hack below should work.
public float[] aBaseStats;
bool initialized = false;
public override void OnInspectorGUI()
{
if (!initialized)
{
initialized = true;
aBaseStats = new float[35];
}
J_Character charScript = (J_Character)target;
charScript.aBaseStats[0] = EditorGUILayout.FloatField("Base Health",aBaseStats[0]);
}
As an addition to the answer by Programmer I would like to point you to the following:
http://docs.unity3d.com/ScriptReference/ExecuteInEditMode.html
This seems to be exactly what you are looking for in terms of functionality. (it runs the method even when playmode is not active)
using UnityEngine;
using System.Collections;
[ExecuteInEditMode]
public class ExampleClass : MonoBehaviour {
public Transform target;
void Update() {
if (target)
transform.LookAt(target);
}
}
This question already has answers here:
How do I test a class that has private methods, fields or inner classes?
(58 answers)
Closed 8 years ago.
Class Elem{
private ArrayList<someType> arr = new ArrayList<>();
public void addElement(someType var) {
arr.add(var);
}
public someType bestelement() {
someType first= arr.get(0);
arr.remove(0);
return first;
}
}
I have written test case for this method and it's running successfully but I need to know how can I be sure that the remove() method was called and the size of array list was reduced by 1? Please do tell me how to get the size of arr in my test case?
Test case for this method
Class ElemTest{
private Elem obj = new Elem();
private someType var1;
private someType var2;
private ArrayList<someType> testArr = new ArrayList<>();
#Test
public void bestElementTest() {
obj.addElement(var1);
obj.addElement(var2);
testArr.add(var1);
testArr.add(var2);
someType result = testArr.get(0);
assertEquals("test failed", result, obj.bestElem());
}
}
Given your example its difficult to advise you, but in general terms you options are to set the class into a known state, call you method which chnages the class and then check that the state has changed in the way you expect.
In this specific case if you have access to the internal list somewhere then you can check that the list has changed (ie the element has been removed). If you don't have access to the internal list then you need to check other things, like:
if you call bestElement() again when the object contains more than 1 element you get a different element
if you call bestElement() again when the object should not have any more elements you get an exception
These obviously rely on being able to set the object into one of the above states and we don't know if that is possible from the sample.
My final piece of advise would be to focus the test on the behaviour that you want to see from your class, not in the implementation of how the class works.
I want to share an Array which all classes can "get" and "change" data inside that array. Something like a Global array or Multi Access array. How this is possible with ActionScript 3.0 ?
There are a couple of ways to solve this. One is to use a global variable (as suggested in unkiwii's answer) but that's not a very common approach in ActionScript. More common approaches are:
Class variable (static variable)
Create a class called DataModel or similar, and define an array variable on that class as static:
public class DataModel {
public static var myArray : Array = [];
}
You can then access this from any part in your application using DataModel.myArray. This is rarely a great solution because (like global variables) there is no way for one part of your application to know when the content of the array is modified by another part of the application. This means that even if your data entry GUI adds an object to the array, your data list GUI will not know to show the new data, unless you implement some other way of telling it to redraw.
Singleton wrapping array
Another way is to create a class called ArraySingleton, which wraps the actual array and provides access methods to it, and an instance of which can be accessed using the very common singleton pattern of keeping the single instance in a static variable.
public class ArraySingleton {
private var _array : Array;
private static var _instance : ArraySingleton;
public static function get INSTANCE() : ArraySingleton {
if (!_instance)
_instance = new ArraySingleton();
return _instance;
}
public function ArraySingleton() {
_array = [];
}
public function get length() : uint {
return _array.length;
}
public function push(object : *) : void {
_array.push(object);
}
public function itemAt(idx : uint) : * {
return _array[idx];
}
}
This class wraps an array, and a single instance can be accessed through ArraySingleton.INSTANCE. This means that you can do:
var arr : ArraySingleton = ArraySingleton.INSTANCE;
arr.push('a');
arr.push('b');
trace(arr.length); // traces '2'
trace(arr.itemAt(0)); // trace 'a'
The great benefit of this is that you can dispatch events when items are added or when the array is modified in any other way, so that all parts of your application can be notified of such changes. You will likely want to expand on the example above by implementing more array-like interfaces, like pop(), shift(), unshift() et c.
Dependency injection
A common pattern in large-scale application development is called dependency injection, and basically means that by marking your class in some way (AS3 meta-data is often used) you can signal that the framework should "inject" a reference into that class. That way, the class doesn't need to care about where the reference is coming from, but the framework will make sure that it's there.
A very popular DI framework for AS3 is Robotlegs.
NOTE: I discourage the use of Global Variables!
But here is your answer
You can go to your default package and create a file with the same name of your global variable and set the global variable public:
//File: GlobalArray.as
package {
public var GlobalArray:Array = [];
}
And that's it! You have a global variable. You can acces from your code (from anywhere) like this:
function DoSomething() {
GlobalArray.push(new Object());
GlobalArray.pop();
for each (var object:* in GlobalArray) {
//...
}
}
As this question was linked recently I would add something also. I was proposed to use singleton ages ago and resigned on using it as soon as I realized how namespaces and references work and that having everything based on global variables is bad idea.
Aternative
Note this is just a showcase and I do not advice you to use such approach all over the place.
As for alternative to singleton you could have:
public class Global {
public static const myArray:Alternative = new Alternative();
}
and use it almost like singleton:
var ga:Alternative = Global.myArray;
ga.e.addEventListener(GDataEvent.NEW_DATA, onNewData);
ga.e.addEventListener(GDataEvent.DATA_CHANGE, onDataChange);
ga.push(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, "ten");
trace(ga[5]); // 5
And your Alternative.as would look similar to singleton one:
package adnss.projects.tchqs
{
import flash.utils.Proxy;
import flash.utils.flash_proxy;
public class Alternative extends Proxy
{
private var _data:Array = [];
private var _events:AltEventDisp = new AltEventDisp();
private var _dispatching:Boolean = false;
public var blockCircularChange:Boolean = true;
public function Alternative() {}
override flash_proxy function getProperty(id:*):* {var i:int = id;
return _data[i += (i < 0) ? _data.length : 0];
//return _data[id]; //version without anal item access - var i:int could be removed.
}
override flash_proxy function setProperty(id:*, value:*):void { var i:int = id;
if (_dispatching) { throw new Error("You cannot set data while DATA_CHANGE event is dipatching"); return; }
i += (i < 0) ? _data.length : 0;
if (i > 9 ) { throw new Error ("You can override only first 10 items without using push."); return;}
_data[i] = value;
if (blockCircularChange) _dispatching = true;
_events.dispatchEvent(new GDataEvent(GDataEvent.DATA_CHANGE, i));
_dispatching = false;
}
public function push(...rest) {
var c:uint = -_data.length + _data.push.apply(null, rest);
_events.dispatchEvent(new GDataEvent(GDataEvent.NEW_DATA, _data.length - c, c));
}
public function get length():uint { return _data.length; }
public function get e():AltEventDisp { return _events; }
public function toString():String { return String(_data); }
}
}
import flash.events.EventDispatcher;
/**
* Dispatched after data at existing index is replaced.
* #eventType adnss.projects.tchqs.GDataEvent
*/
[Event(name = "dataChange", type = "adnss.projects.tchqs.GDataEvent")]
/**
* Dispatched after new data is pushed intwo array.
* #eventType adnss.projects.tchqs.GDataEvent
*/
[Event(name = "newData", type = "adnss.projects.tchqs.GDataEvent")]
class AltEventDisp extends EventDispatcher { }
The only difference form Singleton is that you can actually have multiple instances of this class so you can reuse it like this:
public class Global {
public static const myArray:Alternative = new Alternative();
public static const myArray2:Alternative = new Alternative();
}
to have two separated global arrays or even us it as instance variable at the same time.
Note
Wrapping array like this an using methods like myArray.get(x) or myArray[x] is obviously slower than accessing raw array (see all additional steps we are taking at setProperty).
public static const staticArray:Array = [1,2,3];
On the other hand you don't have any control over this. And the content of the array can be changed form anywhere.
Caution about events
I would have to add that if you want to involve events in accessing data that way you should be careful. As with every sharp blade it's easy to get cut.
For example consider what happens when you do this this:
private function onDataChange(e:GDataEvent):void {
trace("dataChanged at:", e.id, "to", Global.myArray[e.id]);
Global.myArray[e.id]++;
trace("new onDataChange is called before function exits");
}
The function is called after data in array was changed and inside that function you changing the data again. Basically it's similar to doing something like this:
function f(x:Number) {
f(++x);
}
You can see what happens in such case if you toggle myArray.blockCircularChange. Sometimes you would intentionally want to have such recursion but it is likely that you will do it "by accident". Unfortunately flash will suddenly stop such events dispatching without even telling you why and this could be confusing.
Download full example here
Why using global variables is bad in most scenarios?
I guess there is many info about that all over the internet but to be complete I will add simple example.
Consider you have in your app some view where you display some text, or graphics, or most likely game content. Say you have chess game. Mayby you have separated logic and graphics in two classes but you want both to operate on the same pawns. So you create your Global.pawns variable and use that in both Grahpics and Logic class.
Everything is randy-dandy and works flawlessly. Now You come with the great idea - add option for user to play two matches at once or even more. All you have to do is to create another instance of your match... right?
Well you are doomed at this point because, every single instance of your class will use the same Global.pawns array. You not only have this variable global but also you have limited yourself to use only single instance of each class that use this variable :/
So before you use any global variables, just think twice if the thing you want to store in it is really global and universal across your entire app.