大约有 47,000 项符合查询结果（耗时：0.0670秒） [XML]
Default value of BOOL
...L ivar, it will be initialized to NO, as the whole instance is filled with 0 on initialization.
(Note: When ARC is enabled, local object pointers will always be have a default value nil, but local variables of non-object types like BOOL are still initialized to garbage. See Local variables set to n...
Why do I get TypeError: can't multiply sequence by non-int of type 'float'?
...g to get a sale amount (by input) to be multiplied by a defined sales tax (0.08) and then have it print the total amount (sales tax times sale amount).
...
The tilde operator in C
...he ~ operator is bitwise NOT, it inverts the bits in a binary number:
NOT 011100
= 100011
share
|
improve this answer
|
follow
|
...
Check if array is empty or null
...to check if an array is empty or null in jQuery. I tried array.length === 0 but it didn't work. It did not throw any error either.
...
What is “lifting” in Scala?
...ion.
scala> val pf: PartialFunction[Int, Boolean] = { case i if i > 0 => i % 2 == 0}
pf: PartialFunction[Int,Boolean] = <function1>
scala> pf.lift
res1: Int => Option[Boolean] = <function1>
scala> res1(-1)
res2: Option[Boolean] = None
scala> res1(1)
res3: Option[...
Sharing a result queue among several processes
...
|
edited Mar 30 '12 at 21:12
alexis
41.6k1212 gold badges8080 silver badges136136 bronze badges
...
Oracle Differences between NVL and Coalesce
...a part of ANSI-92 standard.
NVL is Oracle specific, it was introduced in 80's before there were any standards.
In case of two values, they are synonyms.
However, they are implemented differently.
NVL always evaluates both arguments, while COALESCE usually stops evaluation whenever it finds the f...
Visual Studio SP1 error: silverlight_sdk.msi is unavailable
I'm trying to install the SP1 for Visual Studio 2010. I first installed the beta and it worked fine. Then I used the web platform installer to install the SQL CE Compact 4, which I assume installed the full SP1 after (this installation took over 12 hours, so I canceled it). The web platform installe...
List of remotes for a Git repository?
...|
edited Jul 18 '18 at 6:10
Peter Mortensen
26.5k2121 gold badges9292 silver badges122122 bronze badges
...
How do I get the difference between two Dates in JavaScript?
...a call to getTime().
So basically: date.getTime() === date.valueOf() === (0 + date) === (+date)
share
|
improve this answer
|
follow
|
...