大约有 45,000 项符合查询结果(耗时:0.0367秒) [XML]
To ARC or not to ARC? What are the pros and cons? [closed]
... unroll loops, eliminate temporary variables, inline functions, etc.)
OK, now I will tell you about the small downsides:
If you're a long-time ObjC developer, you will twitch for about a week when you see ARC code. You will very quickly get over this.
There are some (very) small complications in ...
How to properly create composite primary keys - MYSQL
...
Suppose you have already created a table now you can use this query to make composite primary key
alter table employee add primary key(emp_id,emp_name);
share
|
...
How to convert an array to object in PHP?
...[id]=> 321313[username]=>shahbaz)
$object = (object) $array_name;
//now it is converted to object and you can access it.
echo $object->username;
share
|
improve this answer
|
...
Principles for Modeling CouchDB Documents
I have a question that I've been trying to answer for some time now but can't figure out:
4 Answers
...
Easy idiomatic way to define Ordering for a simple case class
...d: Int) extends Ordered[A] {
// Required as of Scala 2.11 for reasons unknown - the companion to Ordered
// should already be in implicit scope
import scala.math.Ordered.orderingToOrdered
def compare(that: A): Int = (this.tag, this.load) compare (that.tag, that.load)
}
This works because ...
What difference is there between WebClient and HTTPWebRequest classes in .NET?
...
Anyone coming across this like I have just now, note there is a new player on the field called HttpClient that comes with .NET 4.5 that may (or may not?) solve some of the above hassles...
– Funka
Jan 31 '13 at 20:14
...
curl: (60) SSL certificate problem: unable to get local issuer certificate
...as been edited then could the answer be edited to reflect the command line now being used?
– Adam
Feb 5 '18 at 23:10
6
...
Swap key with value JSON
...
Seems the better solution for nowdays (2019)! Somebody can confirm, is it? Performance good? Semantic is perfect: we can see that is really a simple "map and swap" solution.
– Peter Krauss
Jan 3 '19 at 17:41
...
What kind of leaks does automatic reference counting in Objective-C not prevent or minimize?
...d and got my application crashed, later fixed it by changing to strong but now it has a memory leak. So, I changed it to weak and works like a charm.
– chathuram
Jan 22 '13 at 19:59
...
Extract month and year from a zoo::yearmon object
...
I know the OP is using zoo here, but I found this thread googling for a standard ts solution for the same problem. So I thought I'd add a zoo-free answer for ts as well.
# create an example Date
date_1 <- as.Date("1990-01-...
