init

Convenience Init Override

三世轮回 提交于 2019-11-30 01:38:46
问题 Problem Override a convenience initializer of a subclass and it produces a compile error. Detail I am having issues understanding why Swift (v4.1) is not letting me override my convenience initializer. Reading the documentation I found that these two rules apply to my question: Rule 1 If your subclass doesn’t define any designated initializers, it automatically inherits all of its superclass designated initializers. Rule 2 If your subclass provides an implementation of all of its superclass

win10 1903 vs2019 调用RtlInitUnicodeString时导致的蓝屏

你离开我真会死。 提交于 2019-11-30 00:03:23
问题描述(蓝屏条件): 在CreateDevice前添加#pragma code_seg("INIT"), 以RtlInitUnicodeString(&devName, L"\\Device\\MyDDKDevice")形式初始化devName, 将其保存在设备扩展里,给Unload调用,一旦访问devName就会导致蓝屏, 蓝屏代码Bug Check 0x50: PAGE_FAULT_IN_NONPAGED_AREA 以RtlInitUnicodeString(&devName, g_wsDevName)形式初始化devName,则不会蓝屏 在CreateDevice前添加#pragma code_seg("PAGE")或#pragma code_seg()或不添加该行代码 RtlInitUnicodeString第二个参数形式无要求,都正常 注:这是在win10 1903 vs2019下测试的,该测试代码来自《Windows驱动开发技术详解》, 以前win10 1803 vs2017的时候也测试过,但不会导致蓝屏。 PCWSTR g_wsDevName = L"\\Device\\MyDDKDevice"; PCWSTR g_wsDevSymbolicName = L"\\??\\HelloDDK"; //#pragma code_seg("INIT") //1. WRONG

Reinitialized existing Git repository in c:/xampp/htdocs/website/.git/

烈酒焚心 提交于 2019-11-29 23:26:20
问题 I already made a project there, add, commit, push. Unfotunately, I've got power surgery :'( When I've tried restart my PC, I cd back to my project folder, but suddenly it looks like these: UserName@PC /c/xampp/htdocs/website before UserName@PC /c/xampp/htdocs/website (master) I tried git init and this showed up: Reinitialized existing Git repository in c:/xampp/htdocs/website/.git/ but, nothing happen to my repo T__T it still looks like these: UserName@PC /c/xampp/htdocs/website Thank you

Overriding init in subclass

[亡魂溺海] 提交于 2019-11-29 22:11:42
In Objective-C, is it necessary to override all inherited constructors of a subclass to add custom initialization logic? For example, would the following be correct for a UIView subclass with custom initialization logic? @implementation CustomUIView - (id)init { self = [super init]; if (self) { [self initHelper]; } return self; } - (id)initWithFrame:(CGRect)theFrame { self = [super initWithFrame:theFrame]; if (self) { [self initHelper]; } return self; } - (id)initWithCoder:(NSCoder *)decoder { self = [super initWithCoder:decoder]; if (self) { [self initHelper]; } return self; } - (void)

Is there any reason to choose __new__ over __init__ when defining a metaclass?

时间秒杀一切 提交于 2019-11-29 20:53:00
I've always set up metaclasses something like this: class SomeMetaClass(type): def __new__(cls, name, bases, dict): #do stuff here But I just came across a metaclass that was defined like this: class SomeMetaClass(type): def __init__(self, name, bases, dict): #do stuff here Is there any reason to prefer one over the other? Update : Bear in mind that I'm asking about using __new__ and __init__ in a metaclass. I already understand the difference between them in another class. But in a metaclass, I can't use __new__ to implement caching because __new__ is only called upon class creation in a

Best way of preventing other programmers from calling -init

雨燕双飞 提交于 2019-11-29 20:46:44
When designing a class hierarchy, sometimes the subclass has added a new initWithSomeNewParam method, and it would be desirable to disable calls to the old init method inherited from the superclass. First of all, I've read the question here , where the proposed alternatives are either override init to throw an exception at runtime, or override and set default values for properties. In my case, I don't wan't to provide default values, and I want to clearly indicate that the old method should not be called, and instead the new method with parameters should be used. So the runtime exception are

[深入理解Android卷一全文-第三章]深入理解init

若如初见. 提交于 2019-11-29 20:44:10
由于《深入理解Android 卷一》和《深入理解Android卷二》不再出版,而知识的传播不应该因为纸质媒介的问题而中断,所以我将在OSC博客中全文转发这两本书的全部内容。 第3章 深入理解init 本章主要内容 · 深入分析init。 本章涉及的源代码文件名及位置 下面是本章分析的源码文件名及其位置。 · init.c system/core/init/init.c · parser.c system/core/init/parser.c · builtins.c system/core/init/builtins.c · keywords.h system/core/init/keywords/h · init.rc system/core/rootdir/init.rc · properties_service.c system/core/init/properties_service.c · libc_init_dynamic.c bionic/libc/bionic/libc_init_common.c · libc_init_common.c bionic/libc/bionic/libc_init_common.c · properties.c system/core/libcutils/properties.c 3.1 概述 init是一个进程,确切地说

git add all except ignoring files in .gitignore file

一笑奈何 提交于 2019-11-29 19:04:04
I am adding source control to a project that had none. The problem is that there are a lot of files to initially add to git with a .gitignore file, but I can't figure out how to add all files without including the files matching something in the .gitignore file. git add * The above command will not add any files because it detects files which are ignored by the .gitignore . git add -f * The above command will add all files including the files I wish to ignore. So, how do I add all files while still adhering to the .gitignore file? I think you mean git add . which will add all of the files to

RedHat daemon function usage

女生的网名这么多〃 提交于 2019-11-29 17:15:40
问题 I'm working on an init script for Jetty on RHEL. Trying to use the daemon function provided by the init library ( /etc/rc.d/init.d/functions ). I found this terse documentation, and an online example (I've also been looking at other init scripts on the system for examples). Look at this snippet from online to start the daemon daemon --user="$DAEMON_USER" --pidfile="$PIDFILE" "$DAEMON $DAEMON_ARGS &" RETVAL=$? pid=`ps -A | grep $NAME | cut -d" " -f2` pid=`echo $pid | cut -d" " -f2` if [ -n "

Difference with creating and adding controls in PreInit Init

谁说我不能喝 提交于 2019-11-29 13:43:25
There's tons of info on the web about the ASP.NET life cycle, but i can't seem to figure out when to dynamically add controls to the page. In general there are two situations; an aspx page with a masterpage, and one without. The book i'm currently reading (70-515 self prep) says to add controls to a page without a master page in the preinit eventhandler. To dynamically add controls to a contentpage, i should place that logic in the init eventhandler. According to MSDN (http://msdn.microsoft.com/en-us/library/ms178472.aspx) I should create or recreate dynamic controls in the preinit