CODEWITHSUNDEEP
ruby
Fane
Fane

Reputation: 2074

Erase word from ruby that contains a certain char

As the tittle suggests, I'd like to get some chars and check if the string as any of them. If I suppose, for example, "!" to be forbidden, then string.replace("",word_with_!). How can I check for forbidden chars if forbidden_chars is an array? 

forbidden_chars = ["!",",",...]

check ARRAY (it is the string split into an array) for forbidden chars
erase all words with forbidden chars

Could anyone help me please? I just consider searching for the words with the cards and retrieving index as mandatory in the answer please. Thank you very much :)

Upvotes: 0

Views: 62

Answers (2)

Cary Swoveland
Cary Swoveland

Reputation: 110675

string = 'I    like my coffee strong, with no cream or sugar!'
verboten = '!,' 

string.split.select { |s| s.count(verboten).zero? }.join ' '
  #=> "I like my coffee with no cream or"

Note this does not preserve the spacing between "I" and "like" but if there are no extra spaces in string it returns a string that has no extra spaces.

Upvotes: 0

ndnenkov
ndnenkov

Reputation: 36101

string = 'I like my coffee hot, with no sugar!'

forbidden_chars = ['!', ',']
forbidden_chars_pattern = forbidden_chars.map(&Regexp.method(:escape)).join('|')

string.gsub /\S*(#{forbidden_chars_pattern})\S*/, ''
  # => "I like my coffee  with no "

The idea is to match as many non-white space characters as possible \S*, followed by any of the forbidden characters (!|,), followed by as many non-white space characters as possible again.

The reason we need the Regexp.escape is for the cases when a forbidden character has special regex meaning (like .).

Upvotes: 3

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