object

Guava限流器RateLimiter中mutexDoNotUseDirectly/锁的使用

由 倾然丶 夕夏残阳落幕 提交于 2020-01-10 22:04:27
文章目录 源码 疑惑 解惑 写在最后 源码 在阅读Guava限流器代码相关实现时，很多操作都需要加锁，比如在setRate方法中： public final void setRate ( double permitsPerSecond ) { checkArgument ( permitsPerSecond > 0.0 && ! Double . isNaN ( permitsPerSecond ) , "rate must be positive" ) ; synchronized ( mutex ( ) ) { doSetRate ( permitsPerSecond , stopwatch . readMicros ( ) ) ; } } 上述代码的重点即是 synchronized (mutex()){} ，用来在真正的修改速率(doSetRate)方法前加锁，避免出现并发问题。 接下来看 mutex() 方法： // Can't be initialized in the constructor because mocks don't call the constructor. @MonotonicNonNull private volatile Object mutexDoNotUseDirectly ; private Object mutex ( ) {

用three.js在网页实现3D模型

由 别等时光非礼了梦想. 提交于 2020-01-10 22:02:49
首先，下载three.js文件，在threejs官网能下，这里附上地址链接一条https://threejs.org/ 然后，下载解压，会得到three.js-master文件，在build目录找到three.js，这个是three.js的核心功能库。在example/js/loaders目录，你会看到各种模型格式加载的js文件。 本次以加载obj模型为例，准备好obj和mtl文件的模型素材。创建场景的js文件用到基本的three.js，加载模型的js文件用到DDSLoader.js，MTLLoader.js，OBJLoader.js，镜头的转动用OrbitControls.js文件。当然也有其他功能实现替代的js文件，用到的js文件不唯一，文件路径自行设置。本次实例导入如图js文件 实现的Javascript代码如下，注释会解释各块代码是干嘛用。 var camera, controls, scene, renderer;init();animate();// 加载进度var onProgress = function(xhr) { if (xhr.lengthComputable) { var percentComplete = xhr.loaded / xhr.total * 100; var percent = document.getElementById("info")

数组合并--Java原生方法

由 只谈情不闲聊 提交于 2020-01-10 20:33:28
废话不多说，直接上代码（工具类）: public static Object[] combineArray(Object one[], Object two[]) throws BussinessException { Object res[] = null; if(one != null && one.length > 0 && (two == null || two.length == 0)) { res = new Object[one.length]; System.arraycopy(one, 0, res, 0, one.length); } if((one == null || one.length == 0) && two != null && two.length > 0) { res = new Object[two.length]; System.arraycopy(two, 0, res, 0, two.length); } if(two != null && one != null && two.length > 0 && one.length > 0) { res = new Object[two.length + one.length]; System.arraycopy(two, 0, res, 0, two.length); System

Problems limiting object rotation with Mathf.Clamp()

由 泪湿孤枕 提交于 2020-01-10 20:09:26
问题 I am working on a game that rotates an object on the z axis. I need to limit the total rotation to 80 degrees. I tried the following code, but it doesn't work. minAngle = -40.0f and maxAngle = 40.0f Vector3 pos = transform.position; pos.z = Mathf.Clamp(pos.z, minAngle, maxAngle); transform.position = pos; 回答1: The code you posted clamps the z position. What you want is to use transform.rotation void ClampRotation(float minAngle, float maxAngle, float clampAroundAngle = 0) { //clampAroundAngle

Problems limiting object rotation with Mathf.Clamp()

由 跟風遠走 提交于 2020-01-10 20:09:04
问题 I am working on a game that rotates an object on the z axis. I need to limit the total rotation to 80 degrees. I tried the following code, but it doesn't work. minAngle = -40.0f and maxAngle = 40.0f Vector3 pos = transform.position; pos.z = Mathf.Clamp(pos.z, minAngle, maxAngle); transform.position = pos; 回答1: The code you posted clamps the z position. What you want is to use transform.rotation void ClampRotation(float minAngle, float maxAngle, float clampAroundAngle = 0) { //clampAroundAngle

Javascript: Convert dot-delimited strings to nested object value

由 不想你离开。 提交于 2020-01-10 19:36:14
问题 I have a bunch of object attributes coming in as dot-delimited strings like "availability_meta.supplier.price" , and I need to assign a corresponding value to record['availability_meta']['supplier']['price'] and so on. Not everything is 3 levels deep: many are only 1 level deep and many are deeper than 3 levels. Is there a good way to assign this programmatically in Javascript? For example, I need: ["foo.bar.baz", 1] // --> record.foo.bar.baz = 1 ["qux.qaz", "abc"] // --> record.qux.qaz =

Get the property of the difference between two objects in javascript

由 不羁岁月 提交于 2020-01-10 15:40:19
问题 Let's say that I have an object which looks like this: { prop1: false, prop2: false, prop3: false } and another object which looks like this: { prop1: false, prop2: true, prop3: false } where the difference is within the prop2 property. Is there any way or library (vanilla preferred though) which will compare the two objects, find the property with the different value, and return the property name (in this case prop2 )? I have tried using the difference and differenceBy functions in lodash to

Get the property of the difference between two objects in javascript

由 眉间皱痕 提交于 2020-01-10 15:40:14
问题 Let's say that I have an object which looks like this: { prop1: false, prop2: false, prop3: false } and another object which looks like this: { prop1: false, prop2: true, prop3: false } where the difference is within the prop2 property. Is there any way or library (vanilla preferred though) which will compare the two objects, find the property with the different value, and return the property name (in this case prop2 )? I have tried using the difference and differenceBy functions in lodash to

在学python？type、object、class这些不了解一下吗？

由 给你一囗甜甜゛ 提交于 2020-01-10 11:16:57
在Python的学习中我们肯定会听到一句话： 「python中一切皆对象」 。 如果再接着学习下去的话，我们就会接触到Python中的type, object, class等概念。网上也有不少文章阐述了这三者之间的关系，但是在看了大部分文章之后我还是似懂非懂，感觉就像有什么东西卡在了喉咙一直咽下不去一样。 于是为了能让自己晚上顺利吃上饭，我立马对着搜索引擎就是一顿操作，终于赶在外卖小哥打响我电话之前，咽下了这几个如鲠在喉的概念，舒服！ 趁着外卖小哥上楼这会，分享下我学习研究后的理解吧。 python中的对象 python作为面向对象的语言之一，符合一切基于面向对象理念的设计。在面向对象的体系中，对象存在着两种关系。 继承关系 简单来说即子类继承于父类，子类拥有其自身及父类的方法和属性，同名的子类方法和属性将会覆盖父类的方法和属性。 语义化的理解栗子为： 「蛇」类继承自「爬行动物类」，所以「蛇是一种爬行动物」，英文说「snake is a kind of reptile」 。 在python中的继承关系可以简单表示如下： class Reptile : title = '爬行动物' def crawl (self) : print(self.title) class Snake (Reptile) : def crawl_a (self) : print(self.title) p

Role name in association relationship

由 风流意气都作罢 提交于 2020-01-10 10:42:32
问题 From the UML bible, about role : Role: A role name explains how an object participates in the relationship. Each object needs to hold a reference to the associated object or objects. The reference is held in an attribute value within the object. When there is only one association then there is only one attribute holding a reference. What does this sentence mean? Can anyone please offer an example to explain it? 回答1: Roles:A role name explains how an object participates in the relationship.
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