Menu
I was looking for awhile on here and didn't quite find what I needed. I am learning Ruby(1.9) and am trying to do something basic with a text file. I am trying to use RegEx's to remove non-letters, and white space that is ONLY at the beginning of the line, ignoring spaces between tokens(I am trying to count words in the file, hence when I want the spaces between words to remain).
Ex:
555 r6ub6y i7s e7a0sy... w1o2w4.
To change to:
ruby is easy... wow.
What I have so far using the command-line to test ruby rubyfile.rb < test.txt:
$stdin.each do |line|
line.chomp!.downcase!
line.gsub!(/[^a-zA-Z]/, "") #this takes away my spaces!
puts line
end
390
How to remove certain characters from a string Ruby? In Ruby, we can permanently delete characters from a string by using the string. delete method. It returns a new string with the specified characters removed.
=~ is Ruby's basic pattern-matching operator. When one operand is a regular expression and the other is a string then the regular expression is used as a pattern to match against the string. (This operator is equivalently defined by Regexp and String so the order of String and Regexp do not matter.
[^a-zA-Z. ]
add a space as well.
50
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
