Are you looking for Sets.immutableEnumSet (Guava) perhaps? Returns an immutable set instance containing the given enum elements. Internally, the returned set will be backed by an EnumSet. The iteration order of the returned set follows the enum’s iteration order, not the order in which the elements appear in the given collection.
You can recurse over the tree, replacing each defaultdict instance with a dict produced by a dict comprehension: def default_to_regular(d): if isinstance(d, defaultdict): d = {k: default_to_regular(v) for k, v in d.items()} return d Demo: >>> from collections import defaultdict >>> factory = lambda: defaultdict(factory) >>> defdict = factory() >>> defdict[‘one’][‘two’][‘three’][‘four’] = 5 >>> defdict … Read more
Use Constraints: import com.google.common.collect.Constraints; … Constraints.constrainedList(new ArrayList(), Constraints.notNull()) from Guava for maximum flexibility. UPDATE: Guava Constraints has been deprecated in Release 15 – apparently without replacement. UPDATE 2: As of now (Guava 19.0-rc2) Constrains is still there and not deprecated anymore. However, it’s missing from the Javadoc. I’m afraid that the Javadoc is right as … Read more
A Collection is not a necessarily ordered set of elements so there may not be a concept of the “last” element. If you want something that’s ordered, you can use a SortedSet/NavigableSet which has a last() method. Or you can use a List and call mylist.get(mylist.size()-1); If you really need the last element you should … Read more
If you’re willing to replace your application’s Thread creations with another wrapper class, said wrapper class can track the active and inactive Threads for you. Here’s a minimal workable shell of such a wrapper: namespace ThreadTracker { using System.Collections.Generic; using System.Collections.ObjectModel; using System.Threading; public class TrackedThread { private static readonly IList<Thread> threadList = new List<Thread>(); … Read more
Add the :selected option. Example: collection_select(:post, :author_id, Author.all, :id, :name_with_initial, {:selected => “whatever_value”}) Example took from: ApiDock In your case: <%= collection_select :PriceRange, “7”, PriceRange.where(‘value > 0’), :value, :name, {:selected => “whatever”} %>
First of all, new List() won’t work, since the List class is abstract. The other two options are defined as follows in the List object: override def empty[A]: List[A] = Nil override def apply[A](xs: A*): List[A] = xs.toList I.e., they’re essentially equivalent, so it’s mostly a matter of style. I prefer to use empty because … Read more
Let’s say you want to implement a dictionary and print it in alphabetical order, you can use a combination of a TreeMap and a TreeSet: public static void main(String args[]) { Map<String, Set<String>> dictionary = new TreeMap<>(); Set<String> a = new TreeSet<>(Arrays.asList(“Actual”, “Arrival”, “Actuary”)); Set<String> b = new TreeSet<>(Arrays.asList(“Bump”, “Bravo”, “Basic”)); dictionary.put(“B”, b); dictionary.put(“A”, a); … Read more
Try the following in the shell, it will iterate each item within a collection and try to match each document based on ID. Say we have 2 collections db.col1 and db.col2: > db.col1.find() { “_id” : 1, “item” : 1 } { “_id” : 2, “item” : 2 } { “_id” : 3, “item” : … Read more
maybe this way …. RestTemplate template = new RestTemplate(true); ResponseEntity<TblGps[]> responseEntity = restTemplate.getForEntity(urlGETList, TblGps[].class); TblGps[]=responseEntity.getBody();