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February 18, 2016 06:42
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HW 2-16 "Hours in a year"
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| #leah petersen | |
| #homework 2-16-16 "hours-in-a-year" | |
| #format number strings with US-style commas | |
| def separate_comma(number) | |
| whole, decimal = number.to_s.split(".") | |
| whole_with_commas = whole.chars.to_a.reverse.each_slice(3).map(&:join).join(",").reverse | |
| [whole_with_commas, decimal].compact.join(".") | |
| end | |
| #compute hours (24) in a year (365.25) | |
| hours_in_year = 24 * 365.25 | |
| puts "There are " + separate_comma(hours_in_year) + " hours in a year." | |
| #compute minutes (60 in hour) in a decade (10 years) | |
| mins_in_year = hours_in_year * 60 | |
| mins_in_decade = mins_in_year * 10 | |
| puts "There are " + separate_comma(mins_in_decade) + " minutes in a decade." | |
| #compute how many seconds old I am (31 years) | |
| secs_in_year = mins_in_year * 60 | |
| age_in_seconds = secs_in_year * 31 | |
| puts "I am " + separate_comma(age_in_seconds) + " seconds old." | |
| #compute Jeremy's age in years, he is 1,136,086,041.6 seconds old | |
| jeremys_age = 1136086041.6 / secs_in_year | |
| jeremys_age = jeremys_age.round | |
| puts "Jeremy is " + separate_comma(jeremys_age) + " years old." |
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Awesome! Your code is very easy to read and functional - your comments are specific and concise, your variable names sound like what they are, and your code well-organized. That’s a clever/efficient method you wrote to add commas to larger numbers.