Language List
10 Points
array
Instructions
In this exercise you need to implement some methods to manipulate an array of programming languages.
1. Define a method to return an empty language array
Define the LanguageList.list method that takes no arguments and returns an empty array of the type Array(String).
LanguageList.list()
# => []2. Define a method to add a language to the array
Define the LanguageList.add method that takes 2 arguments (a language array and a string literal of a language).
The method should return the array with the new language added to the end of the array.
language_list = LanguageList.list()
# => []
language_list = LanguageList.add(language_list, "Crystal")
# => ["Crystal"]
language_list = LanguageList.add(language_list, "Ruby")
# => ["Crystal", "Ruby"]3. Define a method to remove a language from the array
Define the LanguageList.remove method that takes 1 argument (a language array).
The method should return the array without the last item.
Assume the array will always have at least one item.
language_list = LanguageList.list()
# => []
language_list = LanguageList.add(language_list, "Crystal")
# => ["Crystal"]
language_list = LanguageList.add(language_list, "Ruby")
# => ["Crystal", "Ruby"]
language_list = LanguageList.remove(language_list)
# => ["Crystal"]4. Define a method to return the nth item in the array
Define the LanguageList.at function that takes 2 argument (a language array and an index).
The method should return the language at n index in the array.
Assume that on the index will there always be a language.
language_list = LanguageList.new()
# => []
language_list = LanguageList.add(language_list, "Crystal")
# => ["Crystal"]
language_list = LanguageList.add(language_list, "Ruby")
# => ["Crystal", "Ruby"]
LanguageList.at(language_list, 1)
# => "Ruby"5. Define a method to parse a string of languages
Define the LanguageList.parse method that takes 1 argument (a string literal of languages separated by a comma).
The method should return an array of languages.
LanguageList.parse("Crystal, Ruby")
# => ["Crystal", "Ruby"]Language List
10 Points
array
Instructions
In this exercise you need to implement some methods to manipulate an array of programming languages.
1. Define a method to return an empty language array
Define the LanguageList.list method that takes no arguments and returns an empty array of the type Array(String).
LanguageList.list()
# => []2. Define a method to add a language to the array
Define the LanguageList.add method that takes 2 arguments (a language array and a string literal of a language).
The method should return the array with the new language added to the end of the array.
language_list = LanguageList.list()
# => []
language_list = LanguageList.add(language_list, "Crystal")
# => ["Crystal"]
language_list = LanguageList.add(language_list, "Ruby")
# => ["Crystal", "Ruby"]3. Define a method to remove a language from the array
Define the LanguageList.remove method that takes 1 argument (a language array).
The method should return the array without the last item.
Assume the array will always have at least one item.
language_list = LanguageList.list()
# => []
language_list = LanguageList.add(language_list, "Crystal")
# => ["Crystal"]
language_list = LanguageList.add(language_list, "Ruby")
# => ["Crystal", "Ruby"]
language_list = LanguageList.remove(language_list)
# => ["Crystal"]4. Define a method to return the nth item in the array
Define the LanguageList.at function that takes 2 argument (a language array and an index).
The method should return the language at n index in the array.
Assume that on the index will there always be a language.
language_list = LanguageList.new()
# => []
language_list = LanguageList.add(language_list, "Crystal")
# => ["Crystal"]
language_list = LanguageList.add(language_list, "Ruby")
# => ["Crystal", "Ruby"]
LanguageList.at(language_list, 1)
# => "Ruby"5. Define a method to parse a string of languages
Define the LanguageList.parse method that takes 1 argument (a string literal of languages separated by a comma).
The method should return an array of languages.
LanguageList.parse("Crystal, Ruby")
# => ["Crystal", "Ruby"]