Count inversions in two arrays
1050
Counting inversions in an array
77908
How to count the number of occurrences of each item in an array?
127069
Discrete Math - Counting
82437
How to keep count in a recursive function?
59157
Invert "if" statement to reduce nesting
91596
How to Find Union of Two String Arrays
52348
Counting the number of surjections.
53855
using underscore's “difference” method on arrays of objects
125578
How to get the difference between two arrays in JavaScript?
69504
List array duplicates with count
119047
(How) can I count the items in an enum?
123343
How to determine if one array contains all elements of another array
10894
Element-wise array replication according to a count
99008
Objective-C: Count the number of times an object occurs in an array?
151766
Inverse of numpy's bincount function
35031
Check if an array is subset of another array in Ruby
29245
How to check if two arrays are equal with JavaScript?