Question

JavaScript => static function operator ==(x: Object, y: Object): bool;
C# => static bool operator ==(Object x, Object y);

Parameters

x	The first Object. 第一个对象
y	The Object to compare against the first 此对象与第一个对象比较

Description

Compares if two objects refer to the same.

比较如果两个物体相同。

JavaScript:

	var target : Collider;
	function OnTriggerEnter (trigger : Collider) {
		if (trigger == target)
			print("We hit the target trigger");
	}

C#:

using UnityEngine;
using System.Collections;
 
public class Example : MonoBehaviour {
    public Collider target;
    void OnTriggerEnter(Collider trigger) {
        if (trigger == target)
            print("We hit the target trigger");
 
    }
}

Get early out if there is no target.

如果没有目标提前退出代码。

JavaScript:

var target : Transform;
	function Update () {
		// Early out if the target is gone
		if (target == null)
			return;
	}

C#:

using UnityEngine;
using System.Collections;
 
public class Example : MonoBehaviour {
    public Transform target;
    void Update() {
        if (target == null)
            return;
 
    }
}

Be careful when comparing with null. 小心！当比较为空。 e.g.

GameObject go = new GameObject(); 
Debug.Log (go == null); // false
 
Object obj = new Object();
Debug.Log (obj == null); // true

Instatiating a GameObject adds it to the scene so it's completely initialized (!destroyed). Instantiating a simple UnityEngine.Object has no such semantics, so the it stays in the 'destroyed' state which compares true to null.

实例一个GameObject将其添加到场景，这样它是完全初始化的（非销毁的）。实例一个简单的UnityEngine.Object没有这样的语义，所有它停留在“销毁的”状态，于null比较为true。