大约有 47,000 项符合查询结果(耗时:0.0469秒) [XML]

https://stackoverflow.com/ques... 

What's the difference between Task.Start/Wait and Async/Await?

...g something You are. what is the difference between doing Task.Wait and await task? You order your lunch from the waiter at the restaurant. A moment after giving your order, a friend walks in and sits down next to you and starts a conversation. Now you have two choices. You can ignore your ...
https://stackoverflow.com/ques... 

Why is a boolean 1 byte and not 1 bit of size?

... Actually, the four x86 instructions bt, bts, btr and btc can address single bits! – fredoverflow Jan 7 '11 at 16:07 ...
https://stackoverflow.com/ques... 

“INSERT IGNORE” vs “INSERT … ON DUPLICATE KEY UPDATE”

...y. Side effects are propagated to replicas too. correction: both REPLACE and INSERT...ON DUPLICATE KEY UPDATE are non-standard, proprietary inventions specific to MySQL. ANSI SQL 2003 defines a MERGE statement that can solve the same need (and more), but MySQL does not support the MERGE statemen...
https://stackoverflow.com/ques... 

Fastest way to determine if an integer's square root is an integer

... ~35% faster than your 6bits+Carmack+sqrt code, at least with my CPU (x86) and programming language (C/C++). Your results may vary, especially because I don't know how the Java factor will play out. My approach is threefold: First, filter out obvious answers. This includes negative numbers and ...
https://stackoverflow.com/ques... 

What do 'real', 'user' and 'sys' mean in the output of time(1)?

What do 'real', 'user' and 'sys' mean in the output of time? 6 Answers 6 ...
https://stackoverflow.com/ques... 

Version vs build in Xcode

I have an app that I developed with Xcode 3 and recently started editing with Xcode 4. In the target summary I have the iOS application target form with fields: identifier, version, build, devices, and deployment target. The version field is blank and the build field is 3.4.0 (which matches the vers...
https://stackoverflow.com/ques... 

What is the difference between LR, SLR, and LALR parsers?

What is the actual difference between LR, SLR, and LALR parsers? I know that SLR and LALR are types of LR parsers, but what is the actual difference as far as their parsing tables are concerned? ...
https://stackoverflow.com/ques... 

Does assignment with a comma work?

Why does aaa = 1,2,3 work and set the value of aaa to 1 ? 4 Answers 4 ...
https://stackoverflow.com/ques... 

'Must Override a Superclass Method' Errors after importing a project into Eclipse

... Eclipse is defaulting to Java 1.5 and you have classes implementing interface methods (which in Java 1.6 can be annotated with @Override, but in Java 1.5 can only be applied to methods overriding a superclass method). Go to your project/IDE preferences and s...
https://stackoverflow.com/ques... 

JS Client-Side Exif Orientation: Rotate and Mirror JPEG Images

...on.js through canvas operations. Hope this saves somebody else some time, and teaches the search engines about this open source gem :) share | improve this answer | follow ...