How to avoid last \n character in heredoc

Question

In ruby heredoc:

a = <<~TEXT
  asd
  asd
TEXT

it will generate:

[21] pry(main)> a = <<~TEXT
[21] pry(main)*   asd
[21] pry(main)*   asd
[21] pry(main)* TEXT
=> "asd\n" + "asd\n"

It generate a \n at the end of string, how to avoid this?

score 33 · Accepted Answer · answered Jul 20 '17 at 13:30

33

As sagarpandya82 points out, you will need an additional action (i.e. chomp) to remove that extra \n.

You can use chomp along with heredoc like this:

a = <<~TEXT.chomp
  asd
  asd
TEXT
#=> "asd\nasd"

answered Jul 20 '17 at 13:30

Gerry

2

Source: https://ruby-doc.org/core/doc/syntax/literals_rdoc.html#label-Here+Documents – ma11hew28 Nov 01 '19 at 15:52

score 0 · Answer 2 · answered Sep 12 '20 at 10:51

0

<<-TEXT.squish.squeeze(' ')
  aa
                  b
TEXT
# => "aa b"

answered Sep 12 '20 at 10:51

Almokhtar

3

While this code may solve the question, [including an explanation](https://meta.stackoverflow.com/q/392712/8289918) of how and why this solves the problem would really help to improve the quality of your post and probably result in more up-votes. Remember that you are answering the question for readers in the future, not just the person asking now. Please [edit] your answer to add explanations and give an indication of what limitations and assumptions apply. – Lauren Yim Sep 13 '20 at 01:43

2 Answers2