### [Challenge Name: Minimum Absolute Difference in an Array](/challenges/minimum-absolute-difference-in-an-array) Consider an array of integers, $A = a_0, a_1, \ldots, a_{n-1}$. We define the [absolute difference](https://en.wikipedia.org/wiki/Absolute_difference) between two elements, $a_i$ and $a_j$ (where $i \ne j$), to be the [absolute value](

minimumAbsoluteDifference.rb

#!/bin/ruby

def minimumAbsoluteDifference(n, arr)
    b = arr.sort!
    c = b.map.with_index {|a,i| a - (b[i+1]||0) }
    d = c.map( &:abs )
    return d.sort[0]
end

n = gets.strip.to_i
arr = gets.strip
arr = arr.split(' ').map(&:to_i)
result = minimumAbsoluteDifference(n, arr)
puts result