How to search an array in Ruby?

Question

Say I have an array of strings

arr = ['sandra', 'sam', 'sabrina', 'scott', 'mark', 'melvin']

How would I search this array just like I would an active record object in Rails. For example, the query "sa" would return ['sandra', 'sam', 'sabrina'].

Thanks!

Answer 1

>> arr.select {|s| s.include? 'sa'}
=> ["sandra", "sam", "sabrina"]

Answer 2

A combination of select method and regex would work

arr.select {|a| a.match(/^sa/)}

This one looks for prefixes, but it can be changed to substrings or anything else.

Answer 3

arr.grep(/^sa/)

Answer 4

a.select{|x|x[/^sa/]}