Learn Why to Code

A brief introduction to practical programming

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Filter a Collection

The problem: How do I filter for just the Congressmembers of a given state? Or above a certain age?
The solution: Use a collection's select method.

Lesson content is currently in draft form.

The select method accepts a block and filters a collection on whether each of its members passes the true/false condition:

1
2
3
4

[1,2,3,4,5,6,7].select do |num|
  num > 4
end
#=> [5, 6, 7]

Ignoring bad data

Use the select method to only work with the Congressmember data in which a twitter_id is included

Exercise

Compare the average tweet rate between over 50-year-olds and under 50-year-olds.

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