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delete map[key] in go?
...sions = map[string] chan int{};
sessions["moo"] = make (chan int);
_, ok := sessions["moo"];
if ok {
delete(sessions, "moo");
}
}
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Select 50 items from list at random to write to file
...an just take the first 50.
Otherwise, use
import random
random.sample(the_list, 50)
random.sample help text:
sample(self, population, k) method of random.Random instance
Chooses k unique random elements from a population sequence.
Returns a new list containing elements from the populat...
Xcode without Storyboard and ARC
... isn't the UINavigationController *nav not autoreleased? and we should use _window in [UIWindow alloc]?
– hariszaman
Jul 31 '14 at 9:44
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How to get std::vector pointer to the raw data?
...I didn't see that ugly &*iterator :P
– underscore_d
Nov 17 '15 at 13:53
2
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How to check whether an array is empty using PHP?
... if the variable might not have been set AND you don't wont to trigger an E_NOTICE; IMO this is generally a bad idea.
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install / uninstall APKs programmatically (PackageManager vs Intents)
...dManifest.xml
<uses-permission android:name="android.permission.REQUEST_DELETE_PACKAGES" />
Then:
Intent intent = new Intent(Intent.ACTION_DELETE);
intent.setData(Uri.parse("package:com.example.mypackage"));
startActivity(intent);
to uninstall. Seems easier...
...
How to get the size of a JavaScript object?
... The 'bytes+= recurse( value[i] )' line, throws an error in my FF 14.01: NS_ERROR_FAILURE: Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIDOMHTMLInputElement.selectionStart]. On one of my Object, if I try a different one, it doesn't, maybe a browser bug, or the code doesn't work ...
How to split a sequence into two pieces by predicate?
...
One can shorten the function inside partition to _ % 2 == 0.
– k0pernikus
Aug 21 '19 at 14:11
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How to get the root dir of the Symfony2 application?
...container just to get a variable? It's far better to pass just %kernel.root_dir%
– Massimiliano Arione
Sep 10 '13 at 9:06
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Doctrine and composite unique keys
...straint;
/**
* Common\Model\Entity\VideoSettings
*
* @Table(name="video_settings",
* uniqueConstraints={
* @UniqueConstraint(name="video_unique",
* columns={"video_dimension", "video_bitrate"})
* }
* )
* @Entity
*/
See @UniqueConstraint
...