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I was doing the challenges from pythonchallenge writing code in ruby, specifically this one. It contains a really long string in page source with special characters. I was trying to find a way to delete them/check for the alphabetical chars.
I tried using scan method, but I think I might not use it properly. I also tried delete! like that:
a = "PAGE SOURCE CODE PASTED HERE" a.delete! "!", "@" #and so on with special chars, does not work(?) a How can I do that?
Thanks
460
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.
The . strip method removes the leading and trailing whitespace on strings, including tabs, newlines, and carriage returns ( \t , \n , \r ).
You can do this
a.gsub!(/[^0-9A-Za-z]/, '') try with gsub
a.gsub!(/[!@%&"]/,'') try the regexp on rubular.com
if you want something more general you can have a string with valid chars and remove what's not in there:
a.gsub!(/[^abcdefghijklmnopqrstuvwxyz ]/,'') If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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