intersection

问题 Let's say the following type is defined: interface Shape { color: string; } Now, consider the following ways to add additional properties to this type: Extension interface Square extends Shape { sideLength: number; } Intersection type Square = Shape & { sideLength: number; } What is the difference between both approaches? And, for sake of completeness and out of curiosity, are there other ways to yield comparable results? 回答1: Yes there are differences which may or may not be relevant in your

问题 We are using Apache Solr 5.x, and we currently have a bunch of defined shapes. Polygons, Circles, etc. These all correspond to a document, each shape of coordinates does. What I want to know is - is it possible to provide a circle , that is - a (lat,lng) pair along with a Radius for that circle - and then find all documents that have an intersection with that circle? I have tried a variety of options, most recently this one: solr_index_wkt:"IsWithin(CIRCLE((149.39999999999998 -34.92 d=0

问题 I want to efficiently find the intersection of two lists , keeping duplicates from both , e.g. A=[1,1,2,3], B=[1,1,2,4] should return [1,1,1,1,2] I know a similar question was asked previously (Python intersection of two lists keeping duplicates) however this does not help me because only the duplicates from one list are retained. The following works def intersect(A,B): C=[] for a in A: for b in B: if a==b: C.append(a) return C however it isn't efficient enough for what I'm doing! To speed

问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 7 years ago . I am looking for C algorithms (or code) that implement fast sorted integer array intersection/union operations. The faster, the better. In other words, what's an efficient way in C to implement union and

问题 I have 2 polyhedra generated by the following extreme points: df1 = structure(c(3, 5, 8, 6), .Dim = c(2L, 2L)) df2 = structure(c(2, 4, 9, 7), .Dim = c(2L, 2L)) Those points, taken as constraint inequalities, create a space. I would like to select the hull formed by the intersection of those 2 polyhedra. The use of the function intersectn() from the geometry package, but I get the following error. Error in convhulln(ps1, "n FA") : Received error code 1 from qhull. Qhull error: QH6214 qhull

问题 I tired multiple approaches, but failed to do this one job. All of them use only 2 lists or range of lists. The one most promising was: infile = open('file','r') for line in infile: line = line.split() f = range(int(line[0]),int(line[1])) results_union = set().union(*f) print results_union I have a file with start,end positions like this: (sorted) 1 5 1 3 1 2 2 4 3 6 9 11 9 16 12 17 I would like the output to be: 1 6 9 17 回答1: Try following: def group(data): data = sorted(data) it = iter(data

问题 Is there any way to detect if an object with a certain amount of vertices hits a plane? If so, I want to draw it in binary (black/white) onto the plane or create a texture with it. And I also don't care about if this can only be created with raycasts or some tricky physics operations / shaders / etc.. I'm just wondering what mathematical algorithm could create this. Here is an example of what I'm trying to achieve: Cheers, Michael 回答1: Most games will achieve this with specialized shaders:

问题 I am developing a charting application in which there are 2 polylines, say Polyline A (shown as red colour line in below image) and Polyline B (shown as blue colour line in below image). There can be 2 conditions in the chart: When the red line intersects the blue line from above and then stays below the blue line, I want to fill that area with some color. When the red line intersects the blue line from below and then stays above the blue line, I want to fill that area with some other color.

问题 I have a list of dictionaries. alljson = [{'EchoTime': 0, 'FlipAngle': 90, 'MRAcquisitionType': '2D', 'MagneticFieldStrength': 3, 'Manufacturer': 'SIEMENS', 'ManufacturerModelName': 'TrioTim', 'RepetitionTime': 2, 'ScanOptions': 'FS', 'ScanningSequence': 'AP', 'SequenceVariant': 'SK', 'TaskName': 'Tom'}, {'EchoTime': 0, 'FlipAngle': 90, 'MRAcquisitionType': '2D', 'MagneticFieldStrength': 3, 'Manufacturer': 'SIEMENS', 'ManufacturerModelName': 'TrioTim', 'RepetitionTime': 2, 'ScanOptions': 'FS'

问题 I didn't realize the that Python set function actually separating string into individual characters. I wrote python function for Jaccard and used python intersection method. I passed two sets into this method and before passing the two sets into my jaccard function I use the set function on the setring. example: assume I have string NEW Fujifilm 16MP 5x Optical Zoom Point and Shoot CAMERA 2 7 screen.jpg i would call set(NEW Fujifilm 16MP 5x Optical Zoom Point and Shoot CAMERA 2 7 screen.jpg)