Intersection is a term that relates to descriptive geometry and functions. Intersections are points which are included in multiple objects. They are intersections of the object they belong to.
Questions tagged [intersection]
2483 questions
1435
votes
57 answers
Removing duplicates in lists
How can I check if a list has any duplicates and return a new list without duplicates?
Neemaximo
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1001
votes
40 answers
Simplest code for array intersection in javascript
What's the simplest, library-free code for implementing array intersections in javascript? I want to write
intersection([1,2,3], [2,3,4,5])
and get
[2, 3]
Peter
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21 answers
Find intersection of two nested lists?
I know how to get an intersection of two flat lists:
b1 = [1,2,3,4,5,9,11,15]
b2 = [4,5,6,7,8]
b3 = [val for val in b1 if val in b2]
or
def intersect(a, b):
return list(set(a) & set(b))
print intersect(b1, b2)
But when I have to find…
elfuego1
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How to find list intersection?
a = [1,2,3,4,5]
b = [1,3,5,6]
c = a and b
print c
actual output: [1,3,5,6]
expected output: [1,3,5]
How can we achieve a boolean AND operation (list intersection) on two lists?
csguy11
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How to calculate the intersection of two sets?
Possible Duplicate:
Efficiently finding the intersection of a variable number of sets of strings
Say, have two Hashset, how to calculate the intersection of them?
Set s1 = new HashSet();
Set s2 = new…
user496949
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How can I get the intersection, union, and subset of arrays in Ruby?
I want to create different methods for a class called Multiset.
I have all the required methods, but I'm unsure of how to write intersection, union, and subset methods.
For intersection and union, my code starts like this:
def intersect(var)
x =…
user487743
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Test if lists share any items in python
I want to check if any of the items in one list are present in another list. I can do it simply with the code below, but I suspect there might be a library function to do this. If not, is there a more pythonic method of achieving the same result. …
fmark
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164
votes
24 answers
Intersection and union of ArrayLists in Java
Are there any methods to do so? I was looking but couldn't find any.
Another question: I need these methods so I can filter files.
Some are AND filters and some are OR filters (like in set theory), so I need to filter according to all files and the…
yotamoo
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2 answers
Difference between extending and intersecting interfaces in TypeScript?
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 =…
Willem-Aart
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Intersecting two dictionaries
I am working on a search program over an inverted index. The index itself is a dictionary whose keys are terms and whose values are themselves dictionaries of short documents, with ID numbers as keys and their text content as values.
To perform an…
norman
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votes
6 answers
Python -Intersection of multiple lists?
I am playing with python and am able to get the intersection of two lists:
result = set(a).intersection(b)
Now if d is a list containing a and b and a third element c, is there an built-in function for finding the intersection of all the three…
Legend
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Finding the intersection between two series in Pandas
I have two series s1 and s2 in pandas and want to compute the intersection i.e. where all of the values of the series are common.
How would I use the concat function to do this? I have been trying to work it out but have been unable to (I don't want…
user7289
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81
votes
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Efficient intersection of two List in Java?
Question is simple:
I have two List
List columnsOld = DBUtils.GetColumns(db, TableName);
List columnsNew = DBUtils.GetColumns(db, TableName);
And I need to get the intersection of these. Is there a quick way to achieve this?
Pentium10
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Intersect Two Lists in C#
I have two lists:
List data1 = new List {1,2,3,4,5};
List data2 = new List{"6","3"};
I want do to something like
var newData = data1.intersect(data2, lambda expression);
The lambda expression should return true if…
Merni
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votes
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Circle-circle intersection points
How do I calculate the intersection points of two circles. I would expect there to be either two, one or no intersection points in all cases.
I have the x and y coordinates of the centre-point, and the radius for each circle.
An answer in python…
fmark
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