Top "Set-operations" questions

Set operations as a branch of set theory which includes operations such as: Union, Intersection, Subset, Set Difference, Symmetrical Set Difference, and Set Equality.

Union of dict objects in Python

How do you calculate the union of two dict objects in Python, where a (key, value) pair is present in …

python dictionary associative-array idioms set-operations
Set operations (union, intersection) on Swift array?

Are there any standard library calls I can use to either perform set operations on two arrays, or implement such …

functional-programming swift set-operations
Difference and intersection of two arrays containing objects

I have two arrays list1 and list2 which have objects with some properties; userId is the Id or unique property: …

javascript arrays set-intersection set-difference set-operations
Trying to understand "except all" in sql query

I came across this example and I don't understand what it means. (SELECT drinker FROM Frequents) EXCEPT ALL (SELECT drinker …

sql intersect set-intersection set-difference set-operations