The valid_date? method gives the output true if the given calendar date in a code is a valid date otherwise gives false in Ruby language. To get the valid date use valid_date?() method.
valid_date?() Method in Ruby
valid_date?() method exists in Standard Date Library of Ruby. The purpose of this method is to give the valid date of a calendar year from the given code.
Syntax of the valid_date?() Method in Ruby
In date, the syntax of valid method is:
1 | Date.valid_date?(x) |
Note: If the x parameter is not a valid date or zero the valid_date?() method will return an error.
Return Value of valid_date?() Method
valid_date?() method will return true if the given date of a calendar is a valid date or else gives false.
Get valid date in Ruby
1 2 3 4 | # import date library require 'date' x = Date.valid_date?(2015,9,5) puts x |
Output
true
How to set valid_date?() Format in Ruby?
1 2 3 4 5 6 7 8 9 10 11 12 13 | # import date library require 'date' def valid_date?(date) date_format = '%Y-%m-%d' DateTime.strptime(date, date_format) true rescue ArgumentError false end puts valid_date?('2015-11-30') puts valid_date?('2015-12-32') puts valid_date?('2015-2-29') puts valid_date?('2-29-2015') |
Output
true false false falseNOTE: You can set different date formats to get you desired output like (%d %m %Y), (%m %d %Y) and (%Y %d %m).
How to validate date in Ruby?
1 2 3 4 5 6 7 8 9 | # import date library require 'date' def date_valid?(date, date_format) Date.parse(date).strftime(date_format) == date end puts date_valid?("15 May 2015 Wed", "%d %b %Y %a") puts date_valid?("15 May 2015 Fri", "%d %b %Y %a") puts date_valid?("28 Feb 2015 Wed", "%d %b %Y %a") |
Output
false true false
Parse abbreviated date Directly in Ruby
1 2 3 4 5 | # import date library require 'date' abv_date = 'Mar 25' x = Date.parse abv_date puts x |
Output
{:mon=>3, :mday=>25}1 2 3 4 5 | # import date library require 'date' abv_date = 'Mar 25' x = Date.parse abv_date puts x |
Output
2017-03-251 2 3 4 5 | # import date library require 'date' abv_date = 'Mar 25' x = Date.strptime(abv_date, '%b %d').to_s puts x |
Output
“2017-03-25”
Parse a date string in Ruby
1 2 3 4 5 | # import date library require 'date' date_string = "20150515" x = Date.parse(date_string) puts x |
Output
2015-05-151 2 3 4 5 | # import date library require 'date' date_string = "201505151325" x = date = DateTime.parse(date_string,"%Y%m%d") puts x |
Output
2015-05-15T13:25:00+00:001 2 3 4 5 | # import date library require 'date' date_string = "201505151325" x = date = DateTime._parse(date_string,"%Y%m%d") puts x |
Output
{:year=>2015, :mon=>5, :mday=>15, :hour=>13, :min=>25}
