How to extract the numbers into a separate array from a string

Question

Given this string

"In 2015, I want to know how much does iPhone 6+ cost?"

how can I return [2015, 6]?

My first attempt at this was

numbers = str.tr("^0-9", '')

but that produces 20156.

I see what you're saying @Ilya. But I think mine may be different because I'm explicitly asking for a return of an Array. Where as the other question is not. — Bitwise
– Bitwise, Commented Mar 28, 2017 at 20:37
"How much research effort is expected of Stack Overflow users?" If all you tried was a single attempt using tr, then you need to do more. — the Tin Man
– the Tin Man, Commented Mar 28, 2017 at 21:51

flogram_dev · Accepted Answer · 2017-03-28 20:26:20Z

8

You can use scan:

numbers = str.scan(/\d+/)
# => ["2015", "6"]

answered Mar 28, 2017 at 20:24

flogram_dev

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1 Comment

Add .map(&:to_i) for integers, plus add /\-?\d+/ for possible negative values.

Cary Swoveland · Accepted Answer · 2017-03-28 21:18:30Z

1

scan is better, but this also works.

"In 2015, I want to know how much does iPhone 6+ cost?".gsub(/\D/,' ').split
  #=> ["2015", "6"]

answered Mar 28, 2017 at 21:18

Cary Swoveland

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