Ruby 输出 Unicode 字符

Question

I'm not a Ruby dev by trade, but am using Capistrano for PHP deployments. I'm trying to cleanup the output of my script and am trying to add a unicode check mark as discussed in this blog .

The problem is if I do:

checkmark = "\u2713"
puts checkmark

It outputs "\✓" instead of ✓

I've googled around and I just can't find anywhere that discusses this.

TLDR: How do I puts or print the unicode checkmark U-2713?

EDIT

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I am running Ruby 1.8.7 on my Mac (OSX Lion) so cannot use the encode method. My shell is Bash in iTerm2.

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UPDATE [4/8/2019] Added reference image in case site ever goes down.

Answer 1

In Ruby 1.9.x+

Use String#encode :

checkmark = "\u2713"
puts checkmark.encode('utf-8')

prints

✓

In Ruby 1.8.7

puts '\u2713'.gsub(/\\u[\da-f]{4}/i) { |m| [m[-4..-1].to_i(16)].pack('U') }
✓

Answer 2

falsetru's answer is incorrect.

checkmark = "\u2713"
puts checkmark.encode('utf-8')

This transcodes the checkmark from the current system encoding to UTF-8 encoding. (That works only on a system whose default is already UTF-8.)

The correct answer is:

puts checkmark.force_encoding('utf-8')

This modifies the string's encoding, without modifying any character sequence.

Answer 3

In newer versions of Ruby, you don't need to enforce encoding. Here is an example with 2.1.2 :

2.1.2 :002 > "\u00BD"
 => "½"

Just make sure you use double quotes!

Answer 4

Same goes as above in ERB, no forced encoding required, works perfectly, tested at Ruby 2.3.0

    <%= "\u00BD" %>

Much appreciation

Answer 5

As an additional note, if you want to print an emoji, you have to surround it with braces.

irb(main):001:0> "\u{1F600}"
=> "😀"

Answer 6

How we can print as is in newer version of ruby

checkmark = "\✓" puts checkmark

This should print AS IS \✓