bag

How to avoid an empty result with `Bag.take(n)` when using dask?

由 我们两清 提交于 2019-12-10 18:23:14
问题 Context: Dask documentation states clearly that Bag.take() will only collect from the first partition. However, when using a filter it can occur that the first partition is empty, while others are not. Question: Is it possible to use Bag.take() so that it collects from a sufficient number of partitions to collect the n items (or the maximum available less than than n ). 回答1: You could do something like the following: from toolz import take f = lambda seq: list(take(n, seq)) b.reduction(f, f)

Union of two object bags in Java

由 谁说胖子不能爱 提交于 2019-12-10 18:16:58
问题 I need help with a Java homework problem. I have two bags, say bag1 containing the strings A , B , C and D and bag2 containing strings E , F , G and H . I need to write a BagInterface for the union of those two bag then a class call ArrayBag<T> implements BagInterface<T> . BagInterface I was thinking something like this: public interface BagInterface<T> { public T union(T[] item); } public class ArrayBag<T> implements BagInterface<T> { private final static int DEFAULT_CAP = 4; private int

Why is NHibernate creating a table without primary key?

由 ◇◆丶佛笑我妖孽 提交于 2019-12-10 11:41:45
问题 We create the database using the schemaExport class of nHibernate. I now have an class with attributes from which we generated the nhibernate mapping. A part of this class is: public class PluginInstance { ... [Bag(2, Name = "RouteParams", Access = "property", Table = "CMS_PluginInstanceRouteParams")] [Key(3, Column = "ParamId")] [Element(4, Column = "Param", Type = "string")] public virtual IList<String> RouteParams { get { return _routeParamsField; } set { _routeParamsField = value; } } ...

Objective-C implementation of a histogram or bag datastructure

由 孤街醉人 提交于 2019-12-10 10:11:17
问题 Instead of implementing my own I was wondering if anyone knows of a histogram or bag datastructure implementation in Objective-C that I can use. Essentially a histogram is a hashmap of lists where the lists contain values that relate to their hash entry. A good example is a histogram of supermarket items where you place each group of items dairy, meat, canned goods in their own bag. You can then very easily access each group of items according to their type. 回答1: NSCountedSet is a multiset

What is meant by the term “bag”? [closed]

由 你说的曾经没有我的故事 提交于 2019-12-08 14:17:48
问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . What is a "bag" in Java? I tried to find out from Google but I could not find a precise answer. I got idea from what I found on google that bags are similar to multisets. I want to know whether I am right or wrong because I didnt get proper answer through searching on google. 回答1: Bag: Collection without order,

Bag Class Implementation in Java/Using Array

由 痴心易碎 提交于 2019-12-08 01:16:13
问题 I am having some difficulty understanding my assignment and I just want to make sure I am doing it correctly and would like to get another pair of eyes on my code. My assignment is as follows: Implement a Bag class using an Array as the base data structure, which I have done. In our UML diagram my instructor shows it being an array of objects and am confused as to how I should be doing this with objects and how to compare them. I created a Node class to act as the objects and will attach that

Why is NHibernate creating a table without primary key?

由 丶灬走出姿态 提交于 2019-12-07 00:53:33
We create the database using the schemaExport class of nHibernate. I now have an class with attributes from which we generated the nhibernate mapping. A part of this class is: public class PluginInstance { ... [Bag(2, Name = "RouteParams", Access = "property", Table = "CMS_PluginInstanceRouteParams")] [Key(3, Column = "ParamId")] [Element(4, Column = "Param", Type = "string")] public virtual IList<String> RouteParams { get { return _routeParamsField; } set { _routeParamsField = value; } } ... } The generated part of the nHibernate mapping is the following <bag name="RouteParams" access=

Is there a bag implementation in Ruby?

由 人走茶凉 提交于 2019-12-06 02:43:49
问题 Is there an implementation of the bag collection (a collection like a set, that kept count of how many times an object is inserted)? 回答1: Sure! It's also called a multiset. Here's a nice ruby implementation. 回答2: Pretty simple to create on your own, right? class Bag def initialize @h = Hash.new{ 0 } end def <<(o) @h[o] += 1 end def [](o) @h[o] end end bag = Bag.new bag << :a bag << :b bag << :a p bag[:a], bag[:b], bag[:c], bag #=> 2 #=> 1 #=> 0 #=> #<Bag:0x100138890 @h={:b=>1, :a=>2}> 来源：

Is there a bag implementation in Ruby?

由 半城伤御伤魂 提交于 2019-12-04 08:50:28
Is there an implementation of the bag collection (a collection like a set, that kept count of how many times an object is inserted)? Sam Ritchie Sure! It's also called a multiset . Here's a nice ruby implementation. Pretty simple to create on your own, right? class Bag def initialize @h = Hash.new{ 0 } end def <<(o) @h[o] += 1 end def [](o) @h[o] end end bag = Bag.new bag << :a bag << :b bag << :a p bag[:a], bag[:b], bag[:c], bag #=> 2 #=> 1 #=> 0 #=> #<Bag:0x100138890 @h={:b=>1, :a=>2}> 来源： https://stackoverflow.com/questions/4351793/is-there-a-bag-implementation-in-ruby

How might a class like .NET's ConcurrentBag<T> be implemented?

由 …衆ロ難τιáo~ 提交于 2019-12-03 16:32:31
问题 I find myself very intrigued by the existence of a ConcurrentBag<T> class in the upcoming .NET 4.0 framework: Bags are useful for storing objects when ordering doesn't matter, and unlike sets, bags support duplicates. My question is: how might this idea be implemented? Most collections I'm familiar with essentially amount to (under the hood) some form of array, in which order may not "matter," but there is an order (which is why, even though it doesn't need to, enumeration will pretty much
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