Ruby, parse uppercase letters from array of names

Question

I have a list of names in an array in Ruby:

names = ["John Smith","Bob Miller"]

So I want to do a regex and get this array:

namesRegex = ["JS","BM"]

This is, I extract the uppercase characters from the string, merge them and put them in a new array.

Any help is appreciated.

And what have you tried so far? What is the problem you're running into? — coreyward, May 24 '14 at 21:13

score 1 · Accepted Answer · edited Jun 20 '14 at 22:53

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This is really simple:

names.map { |name| name.gsub(/[^A-Z]/, '') }

You could very readily construct a less elegant but wholly valid solution to this problem that doesn't even require the use of regular expressions or mapping.

edited Jun 20 '14 at 22:53

Brad Larson

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answered May 24 '14 at 21:17

coreyward

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Thanks for the solution. It happens that my lack of experience with the .map function was preventing me to implement the regex for the whole array. – Tripon May 25 '14 at 00:12

score 0 · Answer 2 · answered May 25 '14 at 08:35

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 names.map { |name| name.scan(/\b\w/).*'' }

answered May 25 '14 at 08:35

bluexuemei

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Doesn't `\w` also match non uppercase? – EWit May 25 '14 at 08:59
Yes but at least in the examples, all names/words are starting with an uppercase letter. – undur_gongor Jun 20 '14 at 22:59

Ruby, parse uppercase letters from array of names

2 Answers2