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Module: Ix
Function: index
Type: Ix a => (a,a) -> a -> Int
Class: Ix
Description: maps a bounding pair, which defines the lower and upper bounds of the range, and a subscript, to an integer.
Related:

Example 1

Input: index (10,15) 12

Output: 2

Example 2

Input: index ('A','Z') 'Z'

Output: 25

Example 3

Input: index ((1,5),(6,10)) (3,7)

Output: 14