Select arrays between date ranges with Ruby

Question

I have an array of arrays, I want to select arrays with a date that falls in a certain range.

ar = [[72162, \"2014-01-21\"], 
[53172, \"2014-01-22\"], 
[4937         


        

Answer 1

I'd use Comparable#between?

ar = [ [72162, "2014-01-21"], 
       [53172, "2014-01-22"], 
       [49374, "2014-01-23"], 
       [41778, "2014-01-24"], 
       [34182, "2014-01-25"], 
       [58869, "2014-01-26"], 
       [72162, "2014-01-27"], 
       [43677, "2014-01-28"], 
       [37980, "2014-01-29"], 
       [87354, "2014-01-30"], 
       [43677, "2014-01-31"]
     ]

ar.select { |_,e| e.between?("2014-01-24","2014-01-29") }
# => [[41778, "2014-01-24"],
#     [34182, "2014-01-25"],
#     [58869, "2014-01-26"],
#     [72162, "2014-01-27"],
#     [43677, "2014-01-28"],
#     [37980, "2014-01-29"]]