Get emoji flag from country code in Ruby

Question

I want to convert a country code like "US" to an Emoji flag, ie transform "US" string to the appropriate Unicode in Ruby.

Here's an equivalent example for Java

Alternatively, you could use a hash: `{ 'US' => '', 'NK' => '', ...}` — Stefan, Jun 14 '18 at 14:14
@Stefan Could but it's too much unnecessary code when it can be programmatically generated. Also one can hope platforms will stay up to date with any changes. — mahemoff, Jun 14 '18 at 14:17

Stefan · Accepted Answer · 2018-06-14T15:01:08.390

21

Use tr to translate alphabetic characters to their regional indicator symbols:

'US'.tr('A-Z', "\u{1F1E6}-\u{1F1FF}")
#=> ""

Of course, you can also use the Unicode characters directly:

'US'.tr('A-Z', '-')
#=> ""

edited Jun 14 '18 at 15:01

answered Jun 14 '18 at 14:32

Stefan

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score 6 · Answer 2 · answered Jun 14 '18 at 14:06

6

Here is a port of that to Ruby:

country = 'US'
flagOffset = 0x1F1E6
asciiOffset = 0x41
firstChar = country[0].ord - asciiOffset + flagOffset
secondChar = country[1].ord - asciiOffset + flagOffset
flag = [firstChar, secondChar].pack("U*")

answered Jun 14 '18 at 14:06

vcsjones

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Get emoji flag from country code in Ruby

2 Answers2