compare

问题 I want to deal with limits on the integer number line. I would like to have Pervasives.compare treat RightInfinity > Point x for all x , and the inverse for LeftInfinity . In the ocaml REPL: # type open_pt = LeftInfinity | Point of int | RightInfinity ;; # List.sort Pervasives.compare [LeftInfinity; Point 0; Point 1; RightInfinity] ;; - : open_pt list = [LeftInfinity; RightInfinity; Point 0; Point 1] but # type open_pt = LeftInfinity | Point of int | RightInfinity of unit ;; # List.sort

问题 In Java, Class StudentProgress { String Name; String Grade; /* CTOR goes here */ } main class { main method() { StudentProgress arrayofObjects[100000]; } } If the Grades are like D-,C-,B-,A-,A,B,C,D,A+,B+,C+,D+. I need to sort these objects how can I do it efficiently Thanks in advance 回答1: Your best approach is to make your class implement Comparable. Something like this will work: public class StudentProgress implements Comparable<StudentProgress> { String name; String grade; char baseGrade

问题 The topic explains my wish pretty well i think. So what i want to reach is: madeOutOfSameLetters("aaasdf", "xyz") // false madeOutOfSameLetters("aaasdf", "asdf") // false madeOutOfSameLetters("aaasdf", "aaasdd") // false madeOutOfSameLetters("aaasdf", "fdsaaa") // true Is there a (combination of) method(s) I can use for, or do I need to do it by my own? In second case I would count each letter of both strings, write it into arrays and compare them to each other. But that seems to be more

问题 So what I'm trying to do is change the background of an image according to the time of day, but it's running into a problem. Here's the code: -(void)updateBackground { NSDate *currentTime = [NSDate date]; NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateFormat:@"hh:mm a"]; [dateFormatter setTimeStyle:NSDateFormatterShortStyle]; NSString *resultTime = [dateFormatter stringFromDate:currentTime]; [timeLabel setText:resultTime]; NSString *morningStart =

问题 I have a litte problem and was wondering how to solve it. I have a generic class Tuple<A,B> and now I would like to sort their tuples according to A and B. It should look like this: Unsorted: (1,5) (2,8) (6,8) (1,4) (2,4) Sorted: (1,4) (1,5) (2,4) (2,8) (6,8) For that reason I thought of implementing a generic compare method ( public int compareTo(Tuple<A, B> other) ) in the Tuple class. The only problem is that all objects that you could parameterize the class for (e.g. A=Integer, B=String)

问题 I recently stumbled on a question that made me stop and think... To me, the code below should always trigger an error, but when one of my colleagues asked me why Eclipse didn't show one, I couldn't answer anything. class A { public static void main(String... args) { System.out.println(new Object() == 0); } } I've investigated and found that with source level 1.6 it indeed throws an error: incomparable types: Object and int But now in 1.7 it compiles ok. Please, what new feature does warrant

问题 I have li.box , li.car which are inside a $(this) which contain modified values and then I have box_orig , car_orig containing the original lists... how can I replace $(this) 's data (html data, the li's content) with the original list, so if $(this) contains li.box then I need to replace it with box_orig 's data Edit: var list = $("ul#list"); var box_orig = list.children('.box'); var car_orig = list.children('.car'); And $(this) $('#list li').each(function () { if ($.inArray($(this).attr(

问题 I have two dataframes of different length in python pandas like this: df1: df2: Column1 Column2 Column3 ColumnA ColumnB 0 1 a r 0 1 a 1 2 b u 1 1 d 2 3 c k 2 1 e 3 4 d j 3 2 r 4 5 e f 4 2 w 5 3 y 6 3 h What I am trying to do now is comparing Column1 of df1 and ColumnA of df2. For each "hit", where a row in ColumnA in df2 has the same value as a row in Column1 in df1, I want to append a column to df1 with the vaule ColumnB of df2 has for the row where the "hit" was found, so that my result

问题 I have a very simple view as follows def simple_view(request): documents = request.user.document_set.all() return render(request, 'simple.html', {'documents': documents}) To test the above view in my test case i have the following method which errors out. Class SomeTestCase(TestCase): # ... def test_simple_view(self): # ... some other checks docset = self.resonse.context['documents'] self.assertTrue(self.user.document_set.all() == docset) # This line raises an error # ... The error i get is

问题 I am looking for a way to compare the contents of two NSMutableArray objects. Both arrays are filled with NSMutableDictionaries which were allocated separately but occasionally contain the same data. Simplified Example: NSMutableArray *firstArray = [[NSMutableArray alloc] init]; NSMutableArray *secondArray = [[NSMutableArray alloc] init]; NSMutableDictionary *a = [[NSDictionary alloc] init]; [a setObject:@"foo" forKey:"name"]; [a setObject:[NSNumber numberWithInt:1] forKey:"number"];