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Data Munging

Adapted from CodeKata.

Last month, James showed us how to parse CSV. Here's a chance to practice, and to try something more like a real-world programming problem. You'll want to check out the CSV class in Ruby's standard library to help you.

Part One: Weather Data

In weather.csv you’ll find daily weather data for Morristown, NJ for June 2002. Download this file, then write a program to output the day number with the smallest temperature spread. The day number is in a column labeled Dy, the max temperature is MxT and the min temperature is MnT.

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