map and scan array

Question

I want to list out all of the strings in an array that include a given keyword.

array_name = ["this is california", "hawaii", "washington", "welcome to california"]

a = array_name.map { |s| s.scan(/\b(california)\b/i) }.flatten

# => ["california", "california"]

The above will create a new array of strings where each string is "california". How do I make a new array with the entire original string?

You may get more attention if you add Ruby to the title or somewhere in your question. I'm just saying because it wasn't obvious to me at first what language you were using. — Alex W
– Alex W, Commented Jun 3, 2012 at 3:33
I realize that. I am merely pointing out that it would get more attention from Ruby gurus if it had Ruby in the title or the body of his question. — Alex W
– Alex W, Commented Jun 3, 2012 at 3:36

mu is too short · Accepted Answer · 2019-03-17 19:24:49Z

3

You're using the wrong method if you're trying to find strings that match, you want select:

array_name.select { |s| s.match(/\bcalifornia\b/i) }
# ["this is california", "welcome to california"]

The select method:

Returns an array containing all elements of enum for which block is not false.

edited Mar 17, 2019 at 19:24

answered Jun 3, 2012 at 3:32

mu is too short

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Lars Haugseth · Accepted Answer · 2012-06-03 11:24:44Z

3

array_name.grep /\bcalifornia\b/i
# => ["this is california", "welcome to california"]

answered Jun 3, 2012 at 11:24

Lars Haugseth

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Anil · Accepted Answer · 2012-06-03 03:34:44Z

0

a = array_name.select{|b| b.match /\b(california)\b/i)}

answered Jun 3, 2012 at 3:34

Anil

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