instances

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 7 years ago . I am reading introduction to Scala paper and found following statement: It should be noted that some object-oriented languages do not

问题 Any ideas of how to write a function that returns the number of instances of a process is running? Perhaps something like this? function numInstances([string]$process) { $i = 0 while(<we can get a new process with name $process>) { $i++ } return $i } Edit: Started to write a function... It works for a single instance but it goes into an infinite loop if more than one instance is running: function numInstances([string]$process) { $i = 0 $ids = @() while(((get-process $process) | where {$ids

问题 I aim to create an application that will be deployed thanks to Google App Engine. Before that I would like to calculate the cost of Google App Engine. For this I have to provide the Number of instances, per hour. How can caluculate this number of Instances ? To reformulate, imagine I have 1 thousand users connected, how many users can 1 instance afford ? Thank you for your answer and help Regards Benoit 回答1: It's really hard to answer without more info. App engine consumption will depend on

问题 In my application I need to serialize a vector containing an arbitrary datatype, in this case is a list of Doubles. For serializing the vector I'm importing Data.Vector.Binary. When loading the module in GHCi the following error arises: Overlapping instances for Binary [Double] arising from a use of `decode' at Statistics.hs:57:33-42 Matching instances: instance (Data.Vector.Generic.Base.Vector v a, Binary a) => Binary (v a) -- Defined in Data.Vector.Binary instance (Binary a) => Binary [a] -

问题 I'm trying to obtain tags from instances in my AWS account using Python's boto library. While this snippet works correctly bringing all tags: tags = e.get_all_tags() for tag in tags: print tag.name, tag.value (e is an EC2 connection) When I request tags from individual instances, print vm.__dict__['tags'] or print vm.tags I'm getting an empty list (vm is actually an instance class). The following code: vm.__dict__['tags']['Name'] of course results in: KeyError: 'Name' My code was working

问题 i'm trying to get model objects instance in another one. And i raise this error : Manager isn't accessible via topic instance Here's my model : class forum(models.Model): # Some attributs class topic(models.Model): # Some attributs class post(models.Model): # Some attributs def delete(self): forum = self.topic.forum super(post, self).delete() forum.topic_count = topic.objects.filter(forum = forum).count() Here's my view : def test(request, post_id): post = topic.objects.get(id = int(topic_id)

问题 I have a classe named "whisky builder" which only initiates the new Whisky. Now i would like to add the new added whiskies in my "WhiskyOverViewController". But I face the following problem: class WhiskyOverViewController: UIViewController, UITableViewDataSource, UITableViewDelegate { @IBOutlet weak var tableView: UITableView! var whiskyArray = [WhiskyBuilder]() let stringArray = whiskyArray.map({$0.whiskyName!}) var whiskies = [Character: [String]]() var objectsArray = [Object]() In the line

问题 Toward the end of a program I'm looking to load a specific variable from all the instances of a class into a dictionary. For example: class Foo(): __init__(self): x = {} foo1 = Foo() foo2 = Foo() foo...etc. Let's say the number of instances will vary and I want the x dict from each instance of Foo() loaded into a new dict. How would I do that? The examples I've seen in SO assume one already has the list of instances. 回答1: One way to keep track of instances is with a class variable: class A

问题 I would like to make a deep-copy all the instances of a class, but without copying the definitions and rules of given class. The intended use is, given I have the class "OriginalClass", its instances are the variables I am storing. While the program goes on, I want to be able to use previous "snapshots" of OriginalClass, from which I will only be using the values (I wont store new ones there, so no rules are needed to be inherited). The above simple example works, and is very similar to what

问题 I'm learning Python, but have no OOP experience. I'm entering the following lines in IDLE (Python 3.3), and the behavior of the objects is confusing me: >>> class IBAN: ISOcode = ' ' checkDigits = '00' class CCC: bankCode = '0000' branchCode = '0000' checkBank = '0' checkAccount = '0' account = '0000000000' >>> >>> numberOne = IBAN() >>> numberOne.CCC <class '__main__.IBAN.CCC'> >>> numberOne.CCC.bankCode '0000' >>> numberOne.ISOcode = 'ES' >>> IBAN.ISOcode ' ' >>> numberOne.ISOcode 'ES' >>>