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Async. Postbacks cause Page_Init? (C#)

Async. Postbacks cause Page_Init? (C#) 问题 I'm experiencing a very strange problem... I have a regular ASP.Net webpage with a page_init and a page_load function. It is my understanding(from everywhere I look) that page_init gets called on the first p

API 应用程序编程接口（Unity）

Unity 5.6.0f3 1，如何查看API Help ——> Unity Manual 　　 ——> Scripting Reference 模块化下载安装 2，什么是事件函数 MonoBehaviour 继承自 Behaviour 继承自Component 继承自Object（Unity里面所有物体都是可以称为这个Object.区别于System.Object,是Unity.Object属于Unity.

Calculus不止是微积分的意思

Calculus (disambiguation) Calculus (from Latin calculus meaning ‘pebble’, plural calculī) in its most general sense is any method or system of calculation. Calculus may refer to: Mathematics Infinitesimal calculus (or simply C

bulb

In botany, a bulb is structurally a short stem with fleshy leaves or leaf bases that function as food storage organs during dormancy. (In gardening, plants with other kinds of storage organ are also called "ornamental bulbous plants" or just &qu

virtualBoard示例的错误-QBackingStore::endPaint

官方示例virtualBoard 虚拟键盘在有些板子上不显示，添加如下QQuickWindow::setSceneGraphBackend(QSGRendererInterface::Software);后可显示，但是运行时出现两个问题。问题问题1 QML debugging is enabled. Only use this in a safe environment. QBackingStore::endPaint()

PHP错误：Non-static method think\Request::post() should not be called statically

tp5.1 提示：Non-static method think\Request::post() should not be called statically 则是命名空间的问题，解决方法：将引入use think\Request;的地方修改成use think\facade\Request;

kobject: '(null)' (00000000bbe09fa2): is not initialized, yet kobject_put() is being calle

1. 问题说明在学习宋宝华老师第六章 "字符设备驱动" 示例时，卸载globalmem模块会报告下述异常: [ 4039.481628] ------------[ cut here ]------------ [ 4039.482450] kobject: '(null)' (00000000bbe09fa2): is not initialized, yet kobject_put() is being called. [ 4039.483

Python3中__call__方法介绍

如果Python3类中有__call__方法，那么此类实例的行为类似于函数并且可以像函数一样被调用。当实例作为函数被调用时，如果定义了此方法，则x(arg1, arg2, …)是x.__call__(arg1, arg2, …)的简写。为了将一个类实例当作函数调用，我们需要在类中实现__call__()方法。

Future method cannot be called from a future or batch method

我们知道future方法在batch或者future方法中被调用，会报如下的错误：caused by: System.AsyncException: Future method cannot be called from a future or batch method. 但有时候，因为batch触发了trigger，而trigger调用了future，也会出现同样的错误。那如何解决呢？有一种思路就是用S

Android生命周期初探

Android生命周期 - 手册 Activity的生命周期共七个指示器：onCreate、onStart、onResume、onPause、onStop、onDestroy、onRestart。如下图所示。 onCreate: 不可见状态在Activity被创建时回调，第一个生命周期。我们一般在创建Activity时需要重写该方法做一些初始化的操作，如通

python运算符重载

一、基础知识二、索引和分片：__getitem__ 和 __setitem__ 三、索引迭代：__getitem__ 四、可迭代对象：__iter__ 和 __next__ 五、成员关系：__constains__ 、__iter__ 和 __getitem__ 六、属性访问：__getattr__ 和 __setattr__ 七、字符串显示：__repr__ 和 __str__ 八、右侧加法和原

JavaScript-字符串

JavaScript 字符串用于存储和处理文本。 JavaScript 字符串字符串可以存储一系列字符，如 "John Doe"。字符串可以是插入到引号中的任何字符。你可以使用单引号或双引号： var carname = "Volvo XC60"; var carname = 'Volvo XC60'; 可以使用索引位置来访问字符串中的每个字符： va

Is it a good approach to call return inside using {} statement?

Is it a good approach to call return inside using {} statement? It's perfectly safe to call return inside your using block, since a using block is just a try/finally block. In your example above after return true, the scope will get disposed and the

Window10 安装软件时报错：Called RunScript when not marked in progress

Window10 安装软件时报错：Called RunScript when not marked in progress 解决办法： 1. 进入 C:\Windows 2. 找到"temp"文件夹 ---- 右键“属性” --- “高级” --- “更改” 3. 然后点击 “高级” 输入电脑当前用户的姓名，进行搜索

promise

1 /* 2 尽可能还原 Promise 中的每一个 API, 并通过注释的方式描述思路和原理. 3 */ 4 5 6 // 定义三个状态 7 const PENDING = "PENDING"; 8 const RESOLVED = "RESOLVED"; 9 const REJECTED = 'REJECTED'; 10 function resolvePromise(x, promise2, res

spring bean 生命周期

1 singleton spring 默认的模式，下面两种方式等价 <bean id="accountService" class="com.something.DefaultAccountService"/> <bean id="accountService" class="com.something.DefaultAccountService" scope="singleton"/&

从源码分析DEARGUI之add_menu_items

from dearpygui.dearpygui import * def called_f(a,b): print(a,b)if name == ‘main’: add_additional_font(“潦草丫丫字体.ttf”,size=30)# add_item_color_style("name",style=2,color=[0.1,0.5,0.3]) # add_combo("tst", ["a", "b"], ca

HUAWEI P30 后台应用休眠/常驻设置

UPDATE: On some phones with EMUI 9+ (Android P+) Huawei introduced a new task killer app called PowerGenie which kills everything not whitelisted by Huawei and does not give users any configuration options. See below how to uninstall it. We have mixed

Python3通过函数名调用函数的几种场景实现

一、说明除了执行系统命令外，我们有时还需要动态地执行一些python代码，有经验的朋友就会知道可以使用内置函数eval实现这一需求，如eval("print(__file__)")，这还是比较简单的。但如果要动态执行一个函数，讲的资料就会少一点，这次就要看这个需求该如何实现。二、通过eval实现 1

【Android】Toast on non-UI thread

错误：can't toast on a thread that has not called looper.prepare()https://stackoverflow.com/questions/3875184/cant-create-handler-inside-thread-that-has-not-called-looper-prepare 1 activity.runOnUiThread(new Runnable() { 2 public void run() { 3 T

Python __iter__ 深入理解

先看一个例子： class Fib: def __init__(self, max): self.max = max def __iter__(self): print('__iter__ called') self.a = 0 self.b = 1 return self def __next__(self): print('__next__ called

python 小技巧

1、F字符串（F-Strings) name = "eric" age = 10 res = f"hi my name is {name} i'm {age} now" print(res) """ hi my name is eric i'm 10 now res = f"A total number is {2*3}" print(res) """ A to

AuthenticateRequest event

AuthenticateRequest event 问题 Q 1. To my understanding FormsAuthenticationModule is subscribed to AuthenticateRequest event, and thus only after this event is fired, is FormsAuthenticationModule called. But the following quotes got me a bit confused:

装饰器_下

示例1 from time import ctime,sleep #导包就不需要使用包名.函数了 def timefun(func): def wrappedfunc(): print("%s called at %s"%(func.__name__,ctime())) func()#内部函数需要使用外部函数的参数 return wrappedfunc#返回内部函数 @timefun

RVO优化

RVO--Return Value Optimization概述返回值优化（Return Value Optimization，简称RVO）是一种编译器优化机制：当函数需要返回一个对象的时候，如果自己创建一个临时对象用户返回，那么这个临时对象会消耗一个构造函数（Constructor）的调用、一个复制构造函数的调用（Copy Constructor）以及一个析