大约有 40,000 项符合查询结果（耗时：0.0570秒） [XML]
What is the difference between “def” and “val” to define a function
...ion every time (new instance of Function1).
def even: Int => Boolean = _ % 2 == 0
even eq even
//Boolean = false
val even: Int => Boolean = _ % 2 == 0
even eq even
//Boolean = true
With def you can get new function on every call:
val test: () => Int = {
val r = util.Random.nextInt
...
When does invoking a member function on a null instance result in undefined behavior?
... By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy
...
Center image in div horizontally [duplicate]
.../* for the img inside your div */
display: block;
margin: 0 auto;
That's all.
Note, that you'll also have to set an initial min-width for your outer div.
share
|
improve this answer
|
...
Clojure differences between Ref, Var, Agent, Atom, with examples
... By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy
So, JSONP or CORS? [closed]
...p, using jquery and backbone.js, which reads from various cross-domain web services that we control, and ended up using Json-P instead of CORS because we need to support IE7 and it was a bit simpler on the server side (we run Django w/ DjangoRestFramework), and virtually the same with jquery on the ...
Android studio using > 100% CPU at all times - no background processes appear to be running
I've noticed Android Studio (when running) uses greater than 100% CPU at all times, even when it appears there are no background processes that the IDE is running (indexing, etc). I might suspect this were something specific to my box, but some fellow developers are encountering this as well.
...
Comet implementation for ASP.NET? [closed]
...tly into the IIS/.NET pipeline. It's also available on demand as a hosted service.
It officially supports up to 20,000 concurrent client connections per server node, but individual tests have seen it go as high as 50,000. Message throughput is optimal around the 1,000-5,000 concurrent clients mark...
The differences between .build, .create, and .create! and when should they be used?
... By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy
...
Use of def, val, and var in scala
...sed:
scala> something = 5 * 6
<console>:8: error: value something_= is not a member of object $iw
something = 5 * 6
^
When the class is defined like:
scala> class Person(val name: String, var age: Int)
defined class Person
and then instantiated with:
scala> def pe...
Shortcut to switch between design and text in Android Studio
... On windows it is ATL+SHIFT+RIGHT/LEFT
– vijay_t
Dec 18 '15 at 12:11
This answer shows the key command to searc...