collections

问题 This a new version of my old question: So thanks to Tom Coleman's help I finally figured out on how to properly check if a subscription is ready() or not. My current code structure looks like this: /client/app.js: eventsHandle = null; groupsHandle = null; // ... // First Deps.autorun(): // Does not depend on any Session var, should just run every time Deps.autorun(function() { eventsHandle = Meteor.subscribe("events", function() { console.log('Deps.autorun(): Events loaded'); }); }); //

问题 What is the best way to pick a random brush from the System.Drawing.Brushes collection in C#? 回答1: If you just want a solid brush with a random color, you can try this: Random r = new Random(); int red = r.Next(0, byte.MaxValue + 1); int green = r.Next(0, byte.MaxValue + 1); int blue = r.Next(0, byte.MaxValue + 1); System.Drawing.Brush brush = new System.Drawing.SolidBrush(Color.FromArgb(red, green, blue)); 回答2: For WPF, use reflection: var r = new Random(); var properties = typeof(Brushes)

问题 I've searched quite a while for a Collections API (list, set) for JS and surprisingly I could only this: http://www.coffeeblack.org/work/jscollections/ This is exactly what I was looking for, but I'm wondering why doesn't jQuery provide that? What am I missing on? Or, perhaps, how ineffective are my searching techniques? I know that arrays support pop() and push(), but I need contains() for example. 回答1: You can try js_cols, a collections library for JavaScript. 回答2: Can't you use the jquery

问题 This question already has answers here : Why can final object be modified? (7 answers) Closed 5 years ago . What does it mean for a collection to be declared final in Java? Is it that no more elements can be added to it? Is it that the elements already there cannot be changed? Is it something else? 回答1: No. It simply means that the reference cannot be changed. final List list = new LinkedList(); .... list.add(someObject); //okay list.remove(someObject); //okay list = new LinkedList(); //not

问题 Ok so here is my issue. I have to HashSet 's, I use the removeAll method to delete values that exist in one set from the other. Prior to calling the method, I obviously add the values to the Set s. I call .toUpperCase() on each String before adding because the values are of different cases in both lists. There is no rhyme or reason to the case. Once I call removeAll , I need to have the original cases back for the values that are left in the Set . Is there an efficient way of doing this

问题 Can I, without locking, safely call List.AddRange(r) from multiple threads? If not, what sort of trouble would I run into? 回答1: No , its documentation does not say it is thread safe, therefore it is not. Public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe. As to what can go wrong, think about what AddRange(newItems) does: Check if there is enough space in the internal array If not: Allocate a new array Copy the

问题 I ran a set of performance benchmarks for 10,000,000 elements, and I've discovered that the results vary greatly with each implementation. Can anybody explain why creating a Range.ByOne, results in performance that is better than a simple array of primitives, but converting that same range to a list results in even worse performance than the worse case scenario? Create 10,000,000 elements, and print out those that are modulos of 1,000,000. JVM size is always set to same min and max: -Xms?m

问题 I am trying to get a best match string matching to work using existing Java data structures. It is quite slow though, any suggestions to improve its performance will be welcomed . the Sample data would look like this Key | V --------------------- 0060175559138 | VIP -------------- 006017555 | National -------------- 006017 | Local --------------- 0060 | X -------------- so a best match search on the key = 0060175552020 will return 006017555 One way I can think of is having multiple TreeMaps

问题 Why is the Haskell implementation so focused on linked lists? For example, I know Data.Sequence is more efficient with most of the list operations (except for the cons operation), and is used a lot; syntactically, though, it is "hardly supported". Haskell has put a lot of effort into functional abstractions, such as the Functor and the Foldable class, but their syntax is not compatible with that of the default list. If, in a project I want to optimize and replace my lists with sequences - or

问题 I am trying to sort my custom class array-list using Collections.sort by declaring my own anonymous comparator. But the sort is not working as expected. My code is Collections.sort(arrlstContacts, new Comparator<Contacts>() { public int compare(Contacts lhs, Contacts rhs) { int result = lhs.Name.compareTo(rhs.Name); if(result > 0) { return 1; } else if (result < 0) { return -1; } else { return 0; } } }); The result is not in sorted order. 回答1: Like Adam says, simply do: Collections.sort(