rails MONTHNAMES to_s

Question

this is the problem:

inside a lib i need to print MONTHNAMES to string

if i try

Date::MONTHNAMES.inspect

result is

=> "[nil, \\"January\\", \\"February\\", \\"March\\", \\"April\\", \\"May\\", \\"June\\", \\"July\\", \\"August\\", \\"September\\", \\"October\\", \\"November\\", \\"December\\"]"

that's good but i don't need the first element, so

month_names = Date::MONTHNAMES
month_names.shift
month_names.inspect

but

ActionView::TemplateError (can't modify frozen array) 

there is any workaround? thanks

Answer 1

...也给你所有月份（没有第一个零）。

Date::MONTHNAMES.compact

Answer 2

Date::MONTHNAMES.slice(1,12).inspect

给你所有月份（没有第一个nil ）。

Answer 3

As showed in the error message Date::MONTHNAMES is a frozen object so you can not modify it( shift will modify it by ,well, shifting out the first element). You can achieve what you want by:

puts Date::MONTHNAMES[1..-1].inspect

Answer 4

Although the slice/array indexing solution is probably better here, you can always dup a frozen array and work on the copy:

month_names = Date::MONTHNAMES.dup
month_names.shift
month_names.inspect

should give you what you want.

Answer 5

Date::MONTHNAMES.reject{|m| m.nil?}