大约有 31,400 项符合查询结果(耗时:0.0462秒) [XML]

https://stackoverflow.com/ques... 

Which are more performant, CTE or temporary tables?

... Temp tables also allows for Indexes and even Statistics which are sometimes necessary, while a CTE does not. – CodeCowboyOrg Sep 4 '14 at 15:30 ...
https://stackoverflow.com/ques... 

How to build a query string for a URL in C#?

A common task when calling web resources from a code is building a query string to including all the necessary parameters. While by all means no rocket science, there are some nifty details you need to take care of like, appending an & if not the first parameter, encoding the parameters etc. ...
https://stackoverflow.com/ques... 

The data-toggle attributes in Twitter Bootstrap

... It is a Bootstrap data attribute that automatically hooks up the element to the type of widget it is. Data-* is part of the html5 spec, and data-toggle is specific to Bootstrap. Some Examples: data-toggle="modal" data-toggle="collapse" data-toggle="dropdown" data-toggle...
https://stackoverflow.com/ques... 

Which characters make a URL invalid?

... @techiferous, Yeah, I forgot to allow "%" escaped characters. It should've looked more like: /^([!#$&-;=?-[]_a-z~]|%[0-9a-fA-F]{2})+$/ Was there anything else that you found it should've been accepting? (Just to be clear, that regex only checks ...
https://stackoverflow.com/ques... 

Overriding id on create in ActiveRecord

...why you can't use mass-assignment to set it. However, when setting it manually, it just works: o = SomeObject.new o.id = 8888 o.save! o.reload.id # => 8888 I'm not sure what the original motivation was, but I do this when converting ActiveHash models to ActiveRecord. ActiveHash allows you to...
https://stackoverflow.com/ques... 

Docker build “Could not resolve 'archive.ubuntu.com'” apt-get fails to install anything

... 8.8.8.8 Address 1: 8.8.8.8 If the command appears to hang, but eventually spits out the error "can't resolve 'google.com'", then you have the same problem as me. The nslookup command queries the DNS server 8.8.8.8 in order to turn the text address of 'google.com' into an IP address. Ironicall...
https://stackoverflow.com/ques... 

How different is Objective-C from C++? [closed]

... Short list of some of the major differences: C++ allows multiple inheritance, Objective-C doesn't. Unlike C++, Objective-C allows method parameters to be named and the method signature includes only the names and types of the parameters and return type (see bbum's and Chuck...
https://stackoverflow.com/ques... 

How to access the correct `this` inside a callback?

...d inside each function and its value only depends on how the function was called, not how/when/where it was defined. It is not affected by lexical scopes like other variables (except for arrow functions, see below). Here are some examples: function foo() { console.log(this); } // normal functio...
https://stackoverflow.com/ques... 

How to know if other threads have finished?

...Thread to complete, or Check Thread.isAlive() in a polling fashion -- generally discouraged -- to wait until each Thread has completed, or Unorthodox, for each Thread in question, call setUncaughtExceptionHandler to call a method in your object, and program each Thread to throw an uncaught Exception...
https://stackoverflow.com/ques... 

Select elements by attribute

... @rinogo: actually all you need is if($(":checkbox[myattr]").length) . The () after length is not necessary, neither is the > 0, 0 evaluates to false in equality tests that do not require strict equality (both value and type). ...