What is GSUB in Ruby?
What is GSUB in Ruby?
gsub! is a String class method in Ruby which is used to return a copy of the given string with all occurrences of pattern substituted for the second argument. If no substitutions were performed, then it will return nil. If no block and no replacement is given, an enumerator is returned instead.
How do I replace a string in Ruby?
Changing a Section of a String Ruby allows part of a string to be modified through the use of the []= method. To use this method, simply pass through the string of characters to be replaced to the method and assign the new string.
How do you split a string in Ruby?
split is a String class method in Ruby which is used to split the given string into an array of substrings based on a pattern specified. Here the pattern can be a Regular Expression or a string. If pattern is a Regular Expression or a string, str is divided where the pattern matches.
What is the sequence of Ruby string?
In Ruby, string is a sequence of one or more characters. It may consist of numbers, letters, or symbols. Here strings are the objects, and apart from other languages, strings are mutable, i.e. strings can be changed in place instead of creating new strings.
What is TR in Ruby?
tr returns a copy of str with the characters in from_str replaced by the corresponding characters in to_str . If to_str is shorter than from_str , it is padded with its last character in order to maintain the correspondence. http://apidock.com/ruby/String/tr.
What is %r in Ruby?
280. %r{} is equivalent to the /…/ notation, but allows you to have ‘/’ in your regexp without having to escape them: %r{/home/user} is equivalent to: /\/home\/user/ This is only a syntax commodity, for legibility.
How do you get the first character of a string in Ruby?
Because of an annoying design choice in Ruby before 1.9 — some_string[0] returns the character code of the first character — the most portable way to write this is some_string[0,1] , which tells it to get a substring at index 0 that’s 1 character long.
What is %W in Ruby?
%w(foo bar) is a shortcut for [“foo”, “bar”] . Meaning it’s a notation to write an array of strings separated by spaces instead of commas and without quotes around them.
What is a delimiter in Ruby?
Taking a string and splitting it with a delimiter is a very common task in Ruby. The official documentation states that String#splitdivides str into substrings based on a delimiter, returning an array of these substrings. The delimiter itself can be a string or regular expression: 1 2 3 4 5 6 7.
What is a string literal Ruby?
Strings are most often created with a String literal. A literal is a special syntax in the Ruby language that creates an object of a specific type. For example, 23 is a literal that creates a Fixnum object. As for String literals, there are several forms.
What does TO_S do in Ruby?
to_s is defined on most objects and returns a string representation of this object. Defining to_str on an object is very much like saying “this object behaves like a string”. Calling to_str should return a string-like object, not juste a representation of the object as a string.
How do I remove a character from a string in Ruby?
Ruby | String delete() Method
- Syntax: str.delete(parameter_list)
- Parameters: Here, str is the given string and parameter_list are the specified characters.
- Returns: A new copy of the string with all characters in the intersection of its arguments deleted.
