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Exercise 13

Use Ruby's Array method delete_if and String method start_with? to delete all of the strings that begin with an "s" in the following array.

arr = ['snow', 'winter', 'ice', 'slippery', 'salted roads', 'white trees']

Then recreate the arr and get rid of all of the strings that start with "s" or start with "w".

Solution

arr.delete_if { |str| str.start_with?("s") }

arr.delete_if { |str| str.start_with?("s", "w") }

Video Walkthrough

Duration: 2:43

Errata:

The narrator talks about deleting words. We are actually deleting strings, some of which contain more than one word.
The code in the video uses the variable word where the above solution uses str.

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