-
-
Save nextacademy-private/add8bfed588ecf0d4f02 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| #Run the code. Read the error message. | |
| #Change the assigned value of sample_avg so that it does not throw an error. | |
| def mean(numbers) | |
| sum = numbers.inject(:+) | |
| return sum / numbers.length | |
| end | |
| # This will throw an error. Change this line so that it works. | |
| sample_avg = mean(5, 3, 6, 10) | |
| #comment out the above code with your new solution |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| def mean(numbers) | |
| sum = numbers.inject(:+) | |
| return sum / numbers.length | |
| end | |
| #Instead of changing the method invocation, change the definition. | |
| #In other words, rewrite the method so that it can take any number of arguments. | |
| sample_avg = mean(5, 3, 6, 10) | |
| #comment out the above code with your new solution |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| #Ruby is a dynamically typed programming language, which means that you do not have to define the type of a variable when you assign it. | |
| #Most of the time, this is a very Good Thing. Rubyists can use duck typing, which is a form of dynamic typing. | |
| #In duck typing, one is concerned with just those aspects of an object that are used, rather than with the type of the object itself. | |
| #Source: Wikipedia | |
| #Sometimes, though, the objects our program receives are of a different type than the ones we expected it to receive. This is called a TypeError, and you will see them all over the place in Ruby programs. So get used to it. | |
| #The goal of the code below is to produce an output string and a sorted array from an array input. There is at least one error in this code. You must find it. You must fix it. | |
| def print_and_sort(array) | |
| output_string = "" | |
| array.each do |element| | |
| output_string = output_string + " " + element | |
| end | |
| puts output_string | |
| array.sort | |
| end | |
| words = %w{ all i can say is that my life is pretty plain } | |
| words_with_nil = words.dup.insert(3, nil) | |
| mixed_array = ["2", 1, "5", 4, "3"] | |
| print_and_sort(words) | |
| print_and_sort(words_with_nil) | |
| print_and_sort(mixed_array) | |
| #comment out the above code with your new solution |
def print_and_sort(array)
output_string = ""
array.each do |element|
output_string = output_string + " " + element.to_s
end
puts output_string
array2= [ ]
array.each do|x|
x=x.to_s
array2.push(x)
end
array2.sort
end
words = %w{ all i can say is that my life is pretty plain }
words_with_nil = words.dup.insert(3, nil)
mixed_array = ["2", 1, "5", 4, "3"]
print_and_sort(words)
print_and_sort(words_with_nil)
print_and_sort(mixed_array)
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
def mean(numbers)
sum = numbers.inject(:+)
return sum / numbers.length
end
This will throw an error. Change this line so that it works.
x=[5,3,6,10]
mean(x)