Ruby %w empty value

Question

How do I add empty string as a select option into %w(Mr Ms Mrs Miss)?

I can do ['', 'Mr', 'Ms', 'Mrs', 'Miss'] but I would like to use %w. Thx!

Answer 1

Use unshift it is prepended object to the front:

=> %w(Mr Ms Mrs Miss).unshift ""
#> ["", "Mr", "Ms", "Mrs", "Miss"]

Pretty version without brackets.

Ok for your update:

=> %W(#{} Mr Ms Mrs Miss)
#> ["", "Mr", "Ms", "Mrs", "Miss"]

explain:

• %W - allow interpolation
• %w - not allow interpolation
• #{} - empty string

Answer 2

Try this:

%w(Mr Ms Mrs Miss).unshift('')
["", "Mr", "Ms", "Mrs", "Miss"]