We use cookies to ensure you have the best browsing experience on our website. Please read our cookie policy for more information about how we use cookies.
In this tutorial, we'll learn about the methods in String class that help us to search and replace portions of the string based on a text or pattern.
String.include?(string)
- Returnstrue
if str contains the given string or character. Very simple!
> "hello".include? "lo" #=> true > "hello".include? "ol" #=> false
String.gsub(pattern, <hash|replacement>)
- Returns a new string with all the occurrences of the pattern substituted for the second argument: . The pattern is typically a Regexp, but a string can also be used.
"hello".gsub(/[aeiou]/, '*') #=> "h*ll*" "hello".gsub(/([aeiou])/, '') #=> "hll"
Either method will depend upon the problem you are trying to solve, and the nature of input-output behavior you desire.
In this challenge, your task is to write the following methods:
mask_article
which appends strike tags around certain words in a text. The method takes 2 arguments: A string and an array of words. It then replaces all the instances of words in the text with the modified version.- A helper method
strike
, given one string, appends strike off HTML tags around it. The strike off HTML tag is<strike></strike>
.
For example:
> strike("Meow!") # => "<strike>Meow!</strike>"
> strike("Foolan Barik") # => "<strike>Foolan Barik</strike>"
> mask_article("Hello World! This is crap!", ["crap"])
"Hello World! This is <strike>crap</strike>!"
Apply the helper method in completing your main method.