FAQ: Introduction to Ruby - Strings and String Methods

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This community-built FAQ covers the “Strings and String Methods” exercise from the lesson “Introduction to Ruby”.

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This exercise can be found in the following Codecademy content:

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FAQs on the exercise Strings and String Methods

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6

How do you chain methods on one line. I do not understand this example:
name.method1.method2.method3

1 Like
7

name = “Jason”

puts name.downcase.reverse.upcase

it will only show you the last command. which in this case is upcase letters

3 Likes
8

I tried linking the three methods but was confused that you then only get back out the third method. What kind of application would you have for this?

9

check the spellings of methods in your code.

10

I had the exact same experience as these other folks. It’s not my spelling that’s the issue.

1 Like
11

The chain method works with just one line too.

puts name = “Frank”.downcase.reverse.upcase

worked just fine.

1 Like
12

When using the chain method, I got back all methods at once (except ‘downcase’ and ‘upcase’, they naturally nullify the other. In this case, since I wrote upcase last, it’s the one working by the end).

name = “Alana”
puts name.downcase.reverse.upcase

I got my name spelled backwards and on lowercase:

ANALA

1 Like
13

@theboyjenkins is this perhaps what has happened to you? Or do you only get back out the third method indeed?

14

How do you return a string?

15

I also have this question. I understand that the result will only spit out the last method in the chain… but am wondering why that would be useful in an application? Maybe changing someone’s name from lower case to reverse to upper case isn’t necessarily a good real world example.

16

I don’t think this is a good exercise because the result is not what the user expects.
The explanation that these methods (upcase, downcase, reverse) are not in-place is missing.
To explain what in-place means look at this example:
name = “Aaron”
name.reverse
puts name

Output: Aaron

name = name.reverse
puts name

Output: noraA

So like you see the methods do not change String itself but they return a value.
If you want to see the result either have to

  • Use puts in the same line like so: puts “Aaron”.reverse
    or
  • Store the result in a variable: name = “Aaron”.reverse
  • And after that: puts name
18

I found that when I used this method it worked for me. FYI complete noob here so any critique is welcome and useful.

name_variaton = name.upcase, name.downcase, name.reverse
name= “Jon”
puts name_variation

1 Like