CODEWITHSUNDEEP
rubyregex
bli00
bli00

Reputation: 2787

Check against regular expressions in Ruby

I'm wondering how to check for regular expressions in Ruby. I would like to check files where lines are in this format:

id: 123456 synset: word1,word2,etc

The number of digits of the integer doesn't matter. How many words are in synset doesn't matter either.

Am I supposed to use Regexp?

Upvotes: 0

Views: 185

Answers (2)

Sagar Pandya
Sagar Pandya

Reputation: 9497

./file1.rb:

id: 123456 synset: word1,word2
id: 123456 synset: word1,word2
a;sdlkfjasdlkfj
id: 123456 synset: word1,word2

./file2.rb

file = File.new('./file1.rb','r+')
p file.grep(/^id: \d+ synset: (\w+,?)+$/)
#[
# id: 123456 synset: word1,word2,
# id: 123456 synset: word1,word2,
# id: 123456 synset: word1,word2"
#]

Uses Enumerable#grep to return an array of only the lines which match the regex.

Upvotes: 0

seph
seph

Reputation: 6076

Regex would be handy here:

str = 'id: 123456 synset: word1,word2,etc'
m = str.match(/\Aid: (\d+) synset: (.+)\z/)
id, synset = m.captures
id
 => "123456" 
synset
 => "word1,word2,etc"

Or you could split the string into an array:

arr = str.split
_, id, _, synset = arr
id
 => "123456" 
synset
 => "word1,word2,etc"

Upvotes: 1

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