Convert month string to number

ruby-talk
1

Hi all,

I use linux OS. I would like to convert a file with the folloing format:
-rw-r--r-- 1 student student 11289 26. Jul 22:41 listing.txt

into FileName, Year, Month, Day

In order to do this, i would like to convert the month string from "Jul"
in to the number 7.

I wrote the following code:

def ConvertMonthToNumber(MonthStr)
        case MonthStr
                when "Jan" then 1
                when "Feb" then 2
                when "Mar" then 3
                when "Apr" then 4
                when "May" then 5
                when "Jun" then 6
                when "Jul" then 7
                when "Aug" then 8
                when "Sep" then 9
                when "Okt" then 10
                when "Nov" then 11
                when "Dec" then 12
        end
end

when i run this code, i get the following error:
SortList.rb:7: formal argument cannot be a constant
def ConvertMonthToNumber(MonthStr)
                                 ^

My questions are:
1. Is there already a function that does in Ruby?
2. How to correct this bug?

Thanks

···

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Posted via http://www.ruby-forum.com/.

2

Hi --

Hi all,

I use linux OS. I would like to convert a file with the folloing format:
-rw-r--r-- 1 student student 11289 26. Jul 22:41 listing.txt

into FileName, Year, Month, Day

In order to do this, i would like to convert the month string from "Jul"
in to the number 7.

I wrote the following code:

def ConvertMonthToNumber(MonthStr)
       case MonthStr
               when "Jan" then 1
               when "Feb" then 2
               when "Mar" then 3
               when "Apr" then 4
               when "May" then 5
               when "Jun" then 6
               when "Jul" then 7
               when "Aug" then 8
               when "Sep" then 9
               when "Okt" then 10
               when "Nov" then 11
               when "Dec" then 12
       end
end

when i run this code, i get the following error:
SortList.rb:7: formal argument cannot be a constant
def ConvertMonthToNumber(MonthStr)
                                ^

My questions are:
1. Is there already a function that does in Ruby?
2. How to correct this bug?

1. require 'date'

2. Use a variable instead of a constant as your parameter. Variables
start with lowercase letters or _ (underscore).

David

···

On Sun, 27 Jul 2008, Adgar Marks wrote:
    Date::ABBR_MONTHNAMES.index("Jun") # 6

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