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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...
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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MySQL: #126 - Incorrect key file for table
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you can set tmpdir=/mysql_tmp or something in the my.cnf and it should be on the root filesystem (however big that is)
– Kevin Parker
Jan 2 '15 at 22:24
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How to split a sequence into two pieces by predicate?
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One can shorten the function inside partition to _ % 2 == 0.
– k0pernikus
Aug 21 '19 at 14:11
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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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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
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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...
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Finding all cycles in a directed graph
...nyone using python for this: the Johnson algorithm is implemented as simple_cycle in networkx.
– Joel
Feb 12 '16 at 21:15
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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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