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Using NSPredicate to filter an NSArray based on NSDictionary keys
...ue3"], ["key3": "value4"]]
let dictPredicate = NSPredicate(block: { (obj, _) in
guard let dict = obj as? [String: String], let value = dict["key1"] else { return false }
return value == "value1"
})
let filteredArray = array.filter(dictPredicate.evaluate)
print(filteredArray) // prints: [["...
MySQL: #126 - Incorrect key file for table
...
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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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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Java: Integer equals vs. ==
...ison with == only works for numbers between -128 and 127.
Refer: #Immutable_Objects_.2F_Wrapper_Class_Caching
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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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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 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...
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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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