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Most efficient way to determine if a Lua table is empty (contains no entries)?
...fficient but wrong. (Consider {[false]=0}.) The correct code is
if next(myTable) == nil then
-- myTable is empty
end
For maximum efficiency you'll want to bind next to a local variable, e.g.,
...
local next = next
...
... if next(...) ...
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jQuery OR Selector?
... edited Apr 13 '15 at 7:47
Shimmy Weitzhandler
88.9k116116 gold badges372372 silver badges585585 bronze badges
answered Feb 15 '10 at 3:53
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What exactly does @synthesize do?
...re attributes of an object that can be read or set using the dot notation: myObject.mapView. A property doesn't have to be based on an ivar, but most properties are. The @propertydeclaration simply tells the world that there is a property called mapView.
@synthesize mapView = mapView1;
This line t...
Convert a list to a data frame
... this answer on the original dataset is incorrect.
– MySchizoBuddy
Jul 25 '15 at 19:21
Works great for me! And the nam...
How can I write to the console in PHP?
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Thanks for the hint to my post. But the time and the knowledge has changed, the function also ;) I have it update now.
– bueltge
May 13 '16 at 18:09
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Best way to give a variable a default value (simulate Perl ||, ||= )
...r introducing me to yet another great feature of 5.3 I'm missing out on in my RHEL5/PHP5.1.2 servers.
– Michael Berkowski
May 12 '11 at 2:10
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Display back button on action bar
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In my case, I want to add back button in that page where onOptionsItemSelected(MenuItem item) event will not be there...Is there any other solution for that??
– Vidhi
Feb 23 '15 at 8:01
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In Python, how do I split a string and keep the separators?
...o I just subbed in a double character and then split, hacky but worked for my case: re.split('% ', re.sub('% ', '%% ', '5.000% Additional Whatnot')) --> ['5.000%', 'Additional Whatnot']
– Kyle James Walker
Oct 11 '15 at 22:41
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Handling applicationDidBecomeActive - “How can a view controller respond to the app becoming Active?
I have the UIApplicationDelegate protocol in my main AppDelegate.m class, with the applicationDidBecomeActive method defined.
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Akka or Reactor [closed]
...ference between an Actor in Akka and a Consumer in Reactor? I also updated my question with a sample Event in Akka which I believe resembles the event subscription/dispatching on the Reactor GitHub page. Thanks.
– David Riccitelli
May 17 '13 at 8:40
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