大约有 47,000 项符合查询结果（耗时：0.0785秒） [XML]
Is there a REAL performance difference between INT and VARCHAR primary keys?
... and a coworker won't budge on the INT AUTO_INCREMENT as a primary key for all tables.
14 Answers
...
What is the Scala identifier “implicitly”?
...Implicit Views). In this case, the compiler looks for implicit members, locally defined in the current or enclosing scopes, inherited, or imported, that are either Functions from the type of that the.prefix to a type with selection defined, or equivalent implicit methods.
scala> 1.min(2) // Int ...
How should I edit an Entity Framework connection string?
...
I had to explicitly call save on the app.config file for the designer to recognise the connection string had been deleted.
– Rossco
May 9 '14 at 2:37
...
Bash script to cd to directory with spaces in pathname
I'm using Bash on macOS X and I'd like to create a simple executable script file that would change to another directory when it's run. However, the path to that directory has spaces in it. How the heck do you do this? This is what I have...
...
String concatenation: concat() vs “+” operator
...then throwing it away when you create the final String. In practice memory allocation is surprisingly fast.
Update: As Pawel Adamski notes, performance has changed in more recent HotSpot. javac still produces exactly the same code, but the bytecode compiler cheats. Simple testing entirely fails bec...
how to listen to N channels? (dynamic select statement)
...
Maybe it's my incompetency, but I found this pattern really hard to work with when you are sending & receiving complex structures through the channel. Passing a shared "aggregate" channel, as Tim Allclair said, was much easier in my case.
– Bora M. Alper...
How to make Java honor the DNS Caching Timeout?
...rkaddress.cache.negative.ttl as System Properties by using the -D flag or calling System.setProperty because these are not System properties - they are Security properties.
If you want to use a System property to trigger this behavior (so you can use the -D flag or call System.setProperty), you wil...
What is the Sign Off feature in Git for?
...nto the Linux kernel and a few other projects, but most projects don't actually use it.
It was introduced in the wake of the SCO lawsuit, (and other accusations of copyright infringement from SCO, most of which they never actually took to court), as a Developers Certificate of Origin. It is used to...
unobtrusive validation not working with dynamic content
...rusive jquery validation to work with a partial view that is loaded dynamically through an AJAX call.
7 Answers
...
In Python, how do I determine if an object is iterable?
...e a method like isiterable ? The only solution I have found so far is to call
21 Answers
...