Ruby: convert string to date

Question

In Ruby, what's the best way to convert a string of the format: "{ 2009, 4, 15 }" to a Date?

See also stackoverflow.com/q/3599239/1569

Factor Mystic
– Factor Mystic

2011-03-03 15:18:35 +00:00
Commented Mar 3, 2011 at 15:18 — Factor Mystic
– Factor Mystic, Commented Mar 3, 2011 at 15:18

robinst · Accepted Answer · 2010-04-27 12:12:40Z

129

You could also use Date.strptime:

Date.strptime("{ 2009, 4, 15 }", "{ %Y, %m, %d }")

answered Apr 27, 2010 at 12:12

robinst

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2 Comments

Ross Over a year ago

What if the month is invalid... is there a method that return nil rather than raising an exception

robinst Over a year ago

@Ross: What's wrong with wrapping it in begin and rescue ArgumentError and in that case return nil?

FMc · Accepted Answer · 2010-04-27 12:23:40Z

6

Another way:

s = "{ 2009, 4, 15 }"
d = Date.parse( s.gsub(/, */, '-') )

edited Apr 27, 2010 at 12:23

answered Apr 27, 2010 at 12:08

FMc

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Comments

fl00r · Accepted Answer · 2010-04-27 12:17:44Z

2

def parse_date(date)
  Date.parse date.gsub(/[{}\s]/, "").gsub(",", ".")
end

date = parse_date("{ 2009, 4, 15 }")
date.day
#=> 15
date.month
#=> 4
date.year
#=> 2009

answered Apr 27, 2010 at 12:17

fl00r

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Comments

musefan · Accepted Answer · 2012-01-17 10:39:54Z

0

Another way:

Date.new(*"{ 2009, 04, 15 }".scan(/\d+/).map(&:to_i))

edited Jan 17, 2012 at 10:39

musefan

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answered Jan 17, 2012 at 10:38

Stalin

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