How can I convert this code to return matches in array by substring?

Question

I have the following array:

arr = ["lol","test"]

and a code:

matches = content.downcase.split & arr

where content is a string. This code returns ["lol"] when content = "Something lol", but fails to return anything when content = "Something #lol." with a comma or hashtag etc. It always fails when there is no exact match.

I'd like to match with the strings in the array as substring. How can this be done by adapting the above code?

Does "lol" in arr match "Something xlolx"?

Cary Swoveland
– Cary Swoveland

2015-08-15 14:54:26 +00:00
Commented Aug 15, 2015 at 14:54 — Cary Swoveland
– Cary Swoveland, Commented Aug 15, 2015 at 14:54

sawa · Accepted Answer · 2015-08-15 14:42:08Z

1

Not efficient, but this works:

matches = content.downcase.split.select{|s| arr.any?{|_s| s.include?(_s)}}

answered Aug 15, 2015 at 14:42

sawa

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Comments

Wand Maker · Accepted Answer · 2015-08-15 14:33:33Z

0

Try splitting on non-word boundary as shown below

arr = ["lol","test"]

content = "Something #lol."
p matches = content.downcase.split(/\W/) & arr

Outputs

["lol"]

Sample runs from Try ruby is shown below

edited Aug 15, 2015 at 14:33

answered Aug 15, 2015 at 14:18

Wand Maker

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2 Comments

Wand Maker Over a year ago

What you mean it fails ? Can you please let me what you see? I updated my answer with output I see

Fane Over a year ago

simply does not match and returns empty

Alexander · Accepted Answer · 2015-08-15 14:25:51Z

0

It's not obvious what kind of results you want to receive. I think you can use String#scan. It will return an array of matched data:

patterns = ["lol","test"]
data = content.downcase
matches = patterns.flat_map { |pattern| data.scan(pattern) }

edited Aug 15, 2015 at 14:25

answered Aug 15, 2015 at 14:18

Alexander

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Comments

Cary Swoveland · Accepted Answer · 2015-08-15 15:01:43Z

0

s = content.downcase
arr.select { |w| s =~ /\b#{w}\b/ }

edited Aug 15, 2015 at 15:01

answered Aug 15, 2015 at 14:47

Cary Swoveland

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