comparison

问题 Given the test code: @Test public void testEnumAreEqual() { for (var someEnum : SomeEnum.values()) { Assertions.assertTrue(EnumUtils.isValidEnum(OtherEnum.class, someEnum.name())); } for (var otherEnum : OtherEnum.values()) { Assertions.assertTrue(EnumUtils.isValidEnum(SomeEnum.class, otherEnum.name())); } } I want to check if two given enums are containing the same values. Is there maybe a more elegant way to do this? 回答1: Build a set of the names: Set<String> someEnumNames = Arrays.stream

问题 Background Perl and Ruby have the __END__ and __DATA__ tokens that allow embedding of arbitrary data directly inside a source code file. Although this practice may not be well-advised for general-purpose programming use, it is pretty useful for "one-off" quick scripts for routine tasks. Question: What other programming languages support this same or similar feature, and how do they do it? 回答1: Perl supports the __DATA__ marker, which you can access the contents of as though it were a regular

问题 How can I detect whether the items of two given lists are equal? Dim list1 As New List(Of Integer) list1.AddRange({1, 2, 3}) Dim list2 As New List(Of Integer) list2.AddRange({3, 2, 1}) If I compare them using SequenceEqual I get False because the order of the items is not the same. How can I compare them without sorting them first, though? EDIT: Please take into account that this should respect duplicates, for example {1, 2, 3, 1} is not the same as {1, 2, 3} (item 1 occurs two times in the

问题 I understand the value of asserting [<StructuralEquality;StructuralComparison>] This statically forces equality and comparison constraints to be derived structurally, and have a nice side effect to warn if it can not Similarly [<ReferenceEquality>] forces the equality constraint to be satisfied using reference. Last NoComparison, NoEquality statically unsatisfy those constraints, with the benefit of catching errors as well. However I am unsure what the added value of CustomEquality,

问题 I'm trying to compare 2 Lists (wrapped in an object) containing custom objects. I don't care about the order, but if list 1 contains "1,2,3,4" then list 2 must and only contain those elements. E.g.: "4,2,3,1" Based on Compare two List<T> objects for equality, ignoring order ignoring-order I've used the Except and Any but it doesn't give me the desired results. If I use Assert.Equals it fails, but Assert.IsTry(list1.equals(list2)) succeeds. Further more if I remove the Equals and GetHashCode

问题 I am writing a program in C and Windows API. I am using Visual Studio 2010 Express and Character Set is set to "Not Set". I have made an edit control to accept username. Here's declaration: hwnduser = CreateWindow (TEXT("EDIT"), NULL, WS_VISIBLE | WS_CHILD | WS_BORDER, 220, 70, 80, 20, hwnd, (HMENU) 3, NULL, NULL); I am fetching its value into a string named username. len = GetWindowTextLength(hwnduser) + 1; GetWindowText(hwnduser, username, len); Now, the valid username is in a string called

问题 import collections d = collections.defaultdict(dict) d["i"]["a"] = "111" d["i"]["b"] = "222" print d od = collections.OrderedDict() od["i"]["a"] = "111" od["i"]["b"] = "222" print od Output: defaultdict(<type 'dict'>, {'i': {'a': '111', 'b': '222'}}) Traceback (most recent call last): File "app_main.py", line 51, in run_toplevel File "/Users/adam/Desktop/collections.py", line 12, in <module> od["i"]["a"] = "111" KeyError: 'i' Why the key error with OrderedDict and what I can do about it?

问题 I did this test import time def test1(): a=100 b=200 start=time.time() if (a>b): c=a else: c=b end=time.time() print(end-start) def test2(): a="amisetertzatzaz1111reaet" b="avieatzfzatzr333333ts" start=time.time() if (a>b): c=a else: c=b end=time.time() print(end-start) def test3(): a="100" b="200" start=time.time() if (a>b): c=a else: c=b end=time.time() print(end-start) And obtain as result 1.9073486328125e-06 #test1() 9.5367431640625e-07 #test2() 1.9073486328125e-06 #test3() Execution

问题 I have a list of dictionaries that I get back from a web service call, listA = [{'name':'foo', 'val':'x'}, {'name':'bar', 'val':'1'}, {'name':'alice','val':'2'}] I need to compare the results from the previous call to the service and pull out changes. So on the next call I may get: listB = [{'name':'foo', 'val':'y'}, {'name':'bar', 'val':'1'}, {'name':'eve','val':'z'}] The ordering is not guaranteed and nor is the length of list. The names won't change. The actual data has several more keys,

问题 Presentation : I am working on a piece of code that can compare two javascript Object by looping into the first one (called A) to perform a key lookup in the second one called B (I put value as key and occurence as value). But when I am measuring the performance of the subkey key lookup of Object A (10 times per amount of data, with data as changing parameters for each 10 times the program runs (100 per row, 200...) I get high timing for the smallest amount of data (so potentially less key in