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What are copy elision and return value optimization?
... functions in modern C++ (RVO vs std::move). During watching some of the CppCon 2014 videos, i really got the impression that all modern compilers always do RVO. Furthermore, I've read somewhere that also without any optimizations on, the compilers apply it. But, of course, I am not sure about it. T...
Setup a Git server with msysgit on Windows [closed]
...lowing Tim Davis' guide and Steve's follow-up, here is what I did:
Server PC
Install CopSSH, msysgit.
When creating the CopSSH user, uncheck Password Authentication and check Public Key Authentication so your public/private keys will work.
Create public/private keys using PuTTygen. put both keys ...
Python's os.makedirs doesn't understand “~” in my path
...folder.
NOTE : it will also create folders in path (if required)
srb@srb-pc:~/hello$ ls
srb@srb-pc:~/hello$ python3
>>> from srblib import verify_folder
>>> verify_folder('~/hello/A/B')
>>> exit()
srb@srb-pc:~/hello$ ls
A
srb@srb-pc:~/hello$ ls A
B
srb@srb-pc:~/hello$
...
How can I build a small operating system on an old desktop computer? [closed]
... has ample documentation, because it will generally be simpler than an x86 PC. I've always wanted to write my own OS as well, and I'm starting with writing a microkernel embedded OS for This Development Board from Digilent. It can run the soft-core MicroBlaze processor from Xilinx, which has very th...
MongoDB数据导出导入工具：mongoexport,mongoimport - 大数据 & AI - 清泛...
...说明：
-h: 指明数据库宿主机的IP
-u: 指明数据库的用户名
-p: 指明数据库的密码
-d: 指明数据库的名字
-c: 指明collection的名字
-f: 指明要导出那些列
-o: 指明到要导出的文件名
-q: 指明导出数据的过滤条件
实例：test库中存...
Android SDK manager won't open
...droid SDK in any folder/path that contains spaces.
– PC.
Jan 10 '13 at 11:34
@PC. It means if I rename android SDK par...
Do browsers parse javascript on every page load?
...nitor makes note of the
number of times the jump-target program-counter (PC) value has been
jumped-to. This number is called the hit count for the PC. If the hit
count of a particular PC reaches a threshold value, the target is
considered hot.
When the monitor decides a target PC is hot...
Supabase 拓展：App 接入 Supabase 后端服务（Auth + PostgreSQL + Storage...
...
适用场景
需要用户注册、登录、匿名登录、验证码登录
需要 PostgreSQL 表级增删改查
需要上传下载文件，获取文件访问链接
需要调用 Edge Function 执行服务端逻辑
需要从 Firebase 或其他 BaaS 迁移到开源...
Android error: Failed to install *.apk on device *: timeout
... I found out that it is preferable to use the USB port in the back of your PC, since most of the front USB ports are low powered, and really seem to be slower when uploading apks on your devices.
share
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Are Javascript arrays sparse?
...S stack trace =========================================
0: ExitFrame [pc: 0x100931399]
1: StubFrame [pc: 0x1008ee227]
2: StubFrame [pc: 0x100996051]
Security context: 0x1043830808a1 <JSObject>
3: /* anonymous */ [0x1043830b6919] [repl:1] [bytecode=0x1043830b6841 offset=28](thi...