How to sort this array in ruby?

Question

I have the following task description: Using an array, shopping_list, write the code to print the following words in sorted order: "potato", "cucumber", "banana", "persimmon".

Here is what I tried:

shopping_list = ["potato", "cucumber", "banana", "persimmon"]
shopping_list.sort
puts shopping_list

Why is this being marked incorrect?

sawa · Accepted Answer · 2018-04-16 03:00:06Z

2

You have to use shopping_list.sort!. Adding the exclamation at the end will save the existing array with those sorted values. When you print them again, it should be displayed sorted.

You can read more in the Ruby docs: https://ruby-doc.org/core-2.2.0/Array.html#method-i-sort-21.

edited Apr 16, 2018 at 3:00

sawa

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answered Apr 15, 2018 at 21:35

Horacio Coronel

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4 Comments

tadman Over a year ago

The sort method returns a copy, which in the original code is thrown away. This might be confusing for people used to languages where it sorts in-place.

Cary Swoveland Over a year ago

...but it's better to write puts shopping_list.sort (unless there is an explicit requirement to also modify shopping_list).

Sagar Pandya Over a year ago

adding the exclamation at the end you're making it sound like ! is an operator.

sawa Over a year ago

This is a good suggestion for the OP's issue, but is does not answer the OP's question.

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