date_diff's Introduction

DateDiff

Gem which calculates how many years, months and days are there between two dates

Installation

Add this line to your application's Gemfile:

gem 'date_diff'

And then execute:

$ bundle

Or install it yourself as:

$ gem install date_diff

Usage

require 'date_diff'
components = Date.diff(start_date, end_date)

This will return the hash of date difference in terms of years, months, days.

You can use the difference like:

components[:year], components[:month], components[:day], components[:difference]

Examples

> Date.diff(Date.parse('2000-01-01'), Date.parse('2013-06-19'))
=> {:year => 13, :month => 5, :day => 18, :difference => "13 years 5 months 18 days"}

Contributing

Fork it
Create your feature branch (git checkout -b my-new-feature)
Commit your changes (git commit -am 'Add some feature')
Push to the branch (git push origin my-new-feature)
Create new Pull Request

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date_diff's Issues

Calculation check - not adding up

d1 = Date.parse("12-March-2020")
d2 = Date.parse("1-March-2024")

diff = Date.diff(d1, d2)

puts d1 + diff[:year].years + diff[:month].months + diff[:day].days

> Sun, 03 Mar 2024

Shouldn't the resulting date be 1 Mar 2024?

Thanks - I am probably missing something obvious, but suspect it is not taking in to account the leap year days.

not working with latest gems

Just did a gem update and then attempted the example from the wiki and get the following error: Below is a list of gems installed.

irb(main):001:0> require 'date_diff'
=> true
irb(main):002:0> Date.diff(Date.parse('2000-01-01'), Date.parse('2013-06-19'))
I18n::InvalidLocaleData: can not load translations from /usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/locale/en.yml: #<NoMethodError: undefined method `load_file' for Psych:Module>
    from /usr/local/lib/ruby/gems/2.2.0/gems/i18n-0.7.0/lib/i18n/backend/base.rb:184:in `rescue in load_yml'
    from /usr/local/lib/ruby/gems/2.2.0/gems/i18n-0.7.0/lib/i18n/backend/base.rb:181:in `load_yml'
    from /usr/local/lib/ruby/gems/2.2.0/gems/i18n-0.7.0/lib/i18n/backend/base.rb:165:in `load_file'
    from /usr/local/lib/ruby/gems/2.2.0/gems/i18n-0.7.0/lib/i18n/backend/base.rb:15:in `block in load_translations'
    from /usr/local/lib/ruby/gems/2.2.0/gems/i18n-0.7.0/lib/i18n/backend/base.rb:15:in `each'
    from /usr/local/lib/ruby/gems/2.2.0/gems/i18n-0.7.0/lib/i18n/backend/base.rb:15:in `load_translations'
    from /usr/local/lib/ruby/gems/2.2.0/gems/i18n-0.7.0/lib/i18n/backend/simple.rb:57:in `init_translations'
    from /usr/local/lib/ruby/gems/2.2.0/gems/i18n-0.7.0/lib/i18n/backend/simple.rb:40:in `available_locales'
    from /usr/local/lib/ruby/gems/2.2.0/gems/i18n-0.7.0/lib/i18n/config.rb:43:in `available_locales'
    from /usr/local/lib/ruby/gems/2.2.0/gems/i18n-0.7.0/lib/i18n/config.rb:49:in `available_locales_set'
    from /usr/local/lib/ruby/gems/2.2.0/gems/i18n-0.7.0/lib/i18n.rb:278:in `locale_available?'
    from /usr/local/lib/ruby/gems/2.2.0/gems/i18n-0.7.0/lib/i18n.rb:284:in `enforce_available_locales!'
    from /usr/local/lib/ruby/gems/2.2.0/gems/i18n-0.7.0/lib/i18n.rb:151:in `translate'
    from /usr/local/lib/ruby/gems/2.2.0/gems/date_diff-0.0.4/lib/date_diff.rb:41:in `block in diff'
    from /usr/local/lib/ruby/gems/2.2.0/gems/date_diff-0.0.4/lib/date_diff.rb:39:in `each'
    from /usr/local/lib/ruby/gems/2.2.0/gems/date_diff-0.0.4/lib/date_diff.rb:39:in `diff'
    from (irb):2
    from /usr/local/bin/irb:11:in `<main>'irb(main):003:0>

> gem list

*** LOCAL GEMS ***

activesupport (4.2.0)
awesome_print (1.6.1, 1.2.0)
bigdecimal (1.2.6)
chronic (0.10.2)
chronic_duration (0.10.6)
colored (1.2)
columnize (0.9.0)
command_line_reporter (3.3.2)
countries (0.9.3)
currencies (0.4.2)
date_diff (0.0.4)
dbd-mysql (0.4.4)
dbd-sqlite3 (1.2.5)
dbi (0.4.5)
deprecated (3.0.1, 2.0.1)
ffi (1.9.6)
i18n (0.7.0)
innate (2013.02.21)
io-console (0.4.3)
json (1.8.2, 1.8.1)
mail (2.6.3)
mailfactory (1.4.0)
mime-types (2.4.3)
minitest (5.5.1, 5.5.0)
mysql (2.9.1)
mysql2 (0.3.17)
numerizer (0.2.0, 0.1.1)
psych (2.0.10, 2.0.8)
rack (1.6.0, 1.5.2)
rake (10.4.2)
ramaze (2012.12.08)
rdoc (4.2.0)
ruby-progressbar (1.7.1)
ruby_info (1.0.1)
sequel (4.18.0, 4.17.0)
span (0.1.2)
sqlite3 (1.3.10)
sqlite3-ruby (1.3.3)
sys-cpu (0.7.1)
sys-filesystem (1.1.3)
sys-host (0.6.2)
sys-uname (0.9.2)
sys-uptime (0.6.2)
terminal-table (1.4.5)
thread_safe (0.3.4)
tzinfo (1.2.2)
unicode (0.4.4.2)
unicode_utils (1.4.0)

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