Converting a date to the day of the week

ruby-talk
1

http://www.ruby-doc.org/stdlib/libdoc/date/rdoc/classes/Date.html#M000370

Looking at the Date class there are two constants, a hash DAYS and an array ABBR_DAYNAMES.

DAYS = { 'sunday' => 0, 'monday' => 1, 'tuesday' => 2, 'wednesday'=> 3, 'thursday' => 4, 'friday' => 5, 'saturday' => 6 }
ABBR_DAYNAMES = %w(Sun Mon Tue Wed Thu Fri Sat)

I can get the integer for the day 'number' (0 to 6) from a date using the wday method, ie. Date.today.wday
But how do I use the array or hash from Date.rb, it does not appear to be initialized at the time of use.

Ultimately what I wish to create is a select box (monday-sunday) with today's day pre-selected.

I've looked for a Rails helper to this but there does not appear to be one.

Many thanks. AFM.

2

Hey, I just ran into this yesterday.

require 'date'
require 'date/format'

Date.today.strftime("%a") => "Tues"

Although the code in date/format doesn't look great. It appears to be a duplicate of Time# functions. There might be a better way.
-Mat

···

On Jun 20, 2006, at 9:10 AM, Kris Leech wrote:

http://www.ruby-doc.org/stdlib/libdoc/date/rdoc/classes/Date.html#M000370

Looking at the Date class there are two constants, a hash DAYS and an array ABBR_DAYNAMES.

DAYS = { 'sunday' => 0, 'monday' => 1, 'tuesday' => 2, 'wednesday'=> 3, 'thursday' => 4, 'friday' => 5, 'saturday' => 6 }
ABBR_DAYNAMES = %w(Sun Mon Tue Wed Thu Fri Sat)

I can get the integer for the day 'number' (0 to 6) from a date using the wday method, ie. Date.today.wday
But how do I use the array or hash from Date.rb, it does not appear to be initialized at the time of use.

Ultimately what I wish to create is a select box (monday-sunday) with today's day pre-selected.

I've looked for a Rails helper to this but there does not appear to be one.

Many thanks. AFM.

3

Kris Leech wrote:

http://www.ruby-doc.org/stdlib/libdoc/date/rdoc/classes/Date.html#M000370

Looking at the Date class there are two constants, a hash DAYS and an
array ABBR_DAYNAMES.

DAYS = { 'sunday' => 0, 'monday' => 1, 'tuesday' => 2, 'wednesday'=> 3,
'thursday' => 4, 'friday' => 5, 'saturday' => 6 }
ABBR_DAYNAMES = %w(Sun Mon Tue Wed Thu Fri Sat)

I can get the integer for the day 'number' (0 to 6) from a date using
the wday method, ie. Date.today.wday
But how do I use the array or hash from Date.rb, it does not appear to
be initialized at the time of use.

Ultimately what I wish to create is a select box (monday-sunday) with
today's day pre-selected.

I've looked for a Rails helper to this but there does not appear to be
one.

Many thanks. AFM.

irb(main):003:0> Date::ABBR_DAYNAMES[Date.today.wday]
=> "Tue"
irb(main):004:0> Date::DAYS.index Date.today.wday
=> "tuesday"

HTH

···

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