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https://github.com/TheAlgorithms/Ruby
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34 lines
831 B
Ruby
34 lines
831 B
Ruby
# Challenge name: Number of Days Between Two Dates
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#
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# Write a program to count the number of days between two dates.
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#
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# The two dates are given as strings, their format is YYYY-MM-DD as shown in the examples.
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# Example 1:
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# Input: date1 = "2019-06-29", date2 = "2019-06-30"
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# Output: 1
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#
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# Example 2:
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# Input: date1 = "2020-01-15", date2 = "2019-12-31"
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# Output: 15
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#
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# Constraints: The given dates are valid dates between the years 1971 and 2100.
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#
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# Approach 1: Using Ruby built-in feature Date.parse
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# Time complexity: O(1)
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# Space complexity: O(1)
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#
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require 'date'
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def number_of_days(date1, date2)
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beginning_date = Date.parse(date1)
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end_date = Date.parse(date2)
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(end_date - beginning_date).to_i.abs
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end
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puts number_of_days('2019-06-29', '2019-06-30')
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# => 1
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puts number_of_days('2020-01-15', '2019-12-31')
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# => 15
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