大约有 44,000 项符合查询结果（耗时：0.0544秒） [XML]
difference between variables inside and outside of __init__()
...e I could access both kind of variables through the self reference. It was now, when I ran into trouble, that I researched the topic and cleared it up.
The problem with accessing static class variables through the
self reference is that it only references the static class variable if there is no i...
FFmpeg on Android
I have got FFmpeg compiled (libffmpeg.so) on Android. Now I have to build either an application like RockPlayer or use existing Android multimedia framework to invoke FFmpeg.
...
Android and setting alpha for (image) view alpha
...
@Antonio Done. I made my answer now super-duper-over-verbose ;-)
– sschuberth
Nov 21 '16 at 14:42
add a comment
|...
Moment JS - check if a date is today or in the future
...re:
momentObj.isAfter()
Just leave the args blank -- that'll default to now.
There's also isSameOrAfter and isSameOrBefore.
N.B. this factors in time. If you only care about the day, see Dipendu's answer.
share
...
How do I automatically update a timestamp in PostgreSQL
...update_modified_column()
RETURNS TRIGGER AS $$
BEGIN
NEW.modified = now();
RETURN NEW;
END;
$$ language 'plpgsql';
Apply the trigger like this:
CREATE TRIGGER update_customer_modtime BEFORE UPDATE ON customer FOR EACH ROW EXECUTE PROCEDURE update_modified_column();
...
Abstract functions in Swift Language
...abstractFunction. The protocol would stay the same, and the classes would now look like:
class BaseThing
{
func sharedFunction(thing: Thing)
{
println("All classes share this implementation")
thing.abstractFunction()
}
}
class DerivedThing : BaseThing, Thing
{
fun...
Extract date (yyyy/mm/dd) from a timestamp in PostgreSQL
...estamp;
timestamp
---------------------
2010-01-01 12:00:00
Now we'll cast it to a date:
wconrad=# select '2010-01-01 12:00:00'::timestamp::date;
date
------------
2010-01-01
On the other hand you can use date_trunc function. The difference between them is that the latter ...
Combining Multiple Commits Into One Prior To Push
...ne with. So it has to be picked or 'p'. Use 'Esc' to exit insert mode.
3) Now, save the editor with the following command.
:wq
When you save that, you have a single commit that introduces the changes of all three previous commits.
Hope this will help you.
...
What are namespaces?
... output() to output the final feed.
When you call output(), how does PHP know whether to use your output() function or the RSS library's output() function? It doesn't. Unless you're using namespaces.
Example
How do we solve having two output() functions? Simple. We stick each output() functio...
How can I list ALL DNS records?
...nswer "${3:-any}"
else
dig +nocmd "$1" +noall +answer "${2:-any}"
fi
Now I use dg example.com to get a nice, clean list of DNS records, or dg example.com x to include a bunch of other popular subdomains.
grep -vE "${wild_ips}" filters out records that could be the result of a wildcard DNS ent...