Ruby DateTime to timestamp

You can create a Time object using an Unix timestamp & the at method. You can give the starting date in numbers to Time.new (format: year/month/day) Like this: Time.now. # 2018-10-19 15:43:20 +0200. Time.new(2018, 1, 1) # 2018-01-01 00:00:00 +0100. Time.at(15000000000) # 2017-07-14 04:40:00 +0200 There are various ways to format date and time. Here is one example showing a few −. Live Demo. #!/usr/bin/ruby -w time = Time.new puts time.to_s puts time.ctime puts time.localtime puts time.strftime(%Y-%m-%d %H:%M:%S) This will produce the following result − DateTime ¶ ↑. A subclass of Date that easily handles date, hour, minute, second, and offset. DateTime does not consider any leap seconds, does not track any summer time rules. A DateTime object is created with ::new, ::jd, ::ordinal, ::commercial, ::parse, ::strptime, ::now, Time#to_datetime, etc

msgpack-ruby に timestamp型を実装した - Islands in the byte stream

DateTime#to_date () : to_date () is a DateTime class method which returns the Date object which denotes itself 2 Answers2. Active Oldest Votes. 7. You can add seconds directly to a Time object, so you could do: now = Time.now.utc starts = now + 3600 # Add 1 hour's worth of seconds (60 * 60) ends = now + 7200 # Add 2 hours. and then do the strftime -formatting Get current date and time using DateTime class in Ruby. For a simplified way to access the current date and time. Please see the example given below: # import date library require 'date' # store current date and time in variable x x = DateTime.now # print value of variable x puts x. Output: 2016-07-02T22:43:26+00:00

How to Use Ruby Time & Date Classes (With Examples

You can parse a date time string with a given timezone as well: zone = Pacific Time (US & Canada) ActiveSupport::TimeZone[zone].parse(2020-05-24 18:45:00) => Sun, 24 May 2020 18:45:00 PDT -07:0 It is good practice to avoid %x and %X because there are corresponding locale independent representations, %D and %T. Examples: d = DateTime. new (2007,11,19,8,37,48,-06:00) d. strftime (Printed on %m/%d/%Y) d. strftime (at %I:%M%p I am trying to import data from a DB to another. The source DB has TIMESTAMP (mysql) the destination has DATETIME (mysql). I am trying something like that: start_at = DateTime.at(row[ Class : Date - Ruby 2.7.1 . Creates a date object denoting the given calendar date. In this class, BCE years are counted astronomically Der Code date.to_time.to_isollte gut funktionieren. Die folgende Rails-Konsolensitzung zeigt ein Beispiel: >> Date.new(2009,11,26).to_time => Thu Nov Programmierung; Tags; Account Anmeldung Registrieren. Ruby / Rails: Konvertieren eines Datums in einen UNIX-Zeitstempel. 202 . Wie würde ich einen UNIX-Zeitstempel (Anzahl der Sekunden seit 1970 GMT) von einem Date-Objekt in einer Rails-App.

Ruby - Date & Time - Tutorialspoin

  1. ute, second and offset. Let's create a Date object and print it out. The Date object also has various methods. require 'date' puts Getting date using new method: puts Date.
  2. Time is an abstraction of dates and times. Time is stored internally as the number of seconds with subsecond since the Epoch, 1970-01-01 00:00:00 UTC.. The Time class treats GMT (Greenwich Mean Time) and UTC (Coordinated Universal Time) as equivalent.GMT is the older way of referring to these baseline times but persists in the names of calls on POSIX systems
  3. ruby-on-rails - rails - ruby timestamp to date . Wie formatiere ich in Ruby on Rails ein Datum mit dem Suffix th, wie in Sun Oct 5th? (4) Ich mag Bartosz 'Antwort, aber hey, da wir hier von Rails sprechen, lasst uns einen Schritt weiter machen. (Edit: Obwohl ich nur die folgende Methode monkeyepatch wollte, stellt sich heraus, dass es einen saubereren Weg gibt.).

Class: DateTime (Ruby 2

DateTime. In Ruby consider the DateTime class. It fetches the current date and relative dates. We use operators to adjust days and months. We can even check for leap years. Built-in methods. By using methods like DateTime.now, we can get the current time. And properties like month, year, and day can reveal date info. An example. This program gets the current date with DateTime.now. It also. DateTime#parse() : parse() is a DateTime class method which parses the given representation of date and time, and creates a DateTime object. Syntax: DateTime.parse() Parameter: DateTime values. Return: given representation of date and time, and creates a DateTime object. Example #1 : # Ruby code for DateTime.parse() method # loading library. require 'date' # declaring DateTime value. date_a. Ruby Date & Time. Ruby has Mainly three classes related to date and time in its documentation. Date; DateTime; Time; Date. Ruby date provides two classes, Date and DateTime. To understand the concept of date, first we need to understand some terms. Calendar date: The calendar date is a particular day within a calendar month within a year. Ordinal date: The ordinal date is a particular day of a.

Ruby DateTime to_date() function - GeeksforGeek

ruby - Adding time offsets to create future dates - Code

  1. Ruby - Konvertieren formatierte Datum in timestamp Brauche ich zum konvertieren eines Datums-Strings an den Unix-timestamp-format. Die Zeichenfolge, die ich von einer API sieht wie folgt aus
  2. DateTime#to_time() : to_time() is a DateTime class method which returns the time object which denotes the DateTime object self. Syntax : DateTime.to_time() Parameter: DateTime values. Return: duplicate DateTime object self and resets its to_time. Example #1 : filter_none. edit close. play_arrow. link brightness_4 code # Ruby code for DateTime.to_time() method # loading library . require 'date.
  3. utes to one measured in a # fraction of a day
  4. Ruby on rails provides you with Date and time class helps you represent a specific point in time in your web application. Ruby has three components for representing Date and Time class. Date - Date class manages the dates, day, month, year
JRuby で Ruby on Rails バージョン 3 を使ってみる

Date and Time are one of the basic requirement for any web application. Ruby on rails provides you with Date and time class helps you represent a specific point in time in your web application.Ruby has three components for representing Date and Time class Ruby Date/Time Precision . Sometimes it is desirable to manipulate dates or times for which incomplete information is known. For example, one might only know the year, or the year and the month. Unfortunately, Ruby's built-in Date, Time, and DateTime classes do not keep track of the precision of the data. For example: Date. new.to_s # => -4712-01-01 Date. new (2000).to_s # => 2000-01-01. Ruby Date/Time Precision. Contribute to workergnome/date_time_precision development by creating an account on GitHub

Ruby: Get Current Date and Time - Examples & Explanatio

  1. utes. Working with dates can be hard. You need to consider time zones, understand how to store dates in your database, parse strings into dates or even format dates and display them to the user
  2. All three are Ruby classes used for working with time. Time is built-in to Ruby; Date and DateTime come from the standard library date. Time.now #=> 2020-12-31 06:23:24 +0000 require 'date' Date.today #=> #<Date: 2020-12-31 ((2459215j,0s,0n),+0s,2299161j)> DateTime.now #=> #<DateTime: 2020-12-31T06:23:24+00:00 ((2459215j,23004s,705068155n),+0s,2299161j)> They can also be created as specific.
  3. Ruby/Rails: converting a Date to a UNIX timestamp. How would I get a UNIX timestamp (number of seconds since 1970 GMT) from a Date object in a Rails app? I know Time#to_i returns a timestamp, but doing Date#to_time and then getting the timestamp results in something that's off by about a month (not sure why...). Any help is appreciated, thanks! Edit: OK, I think I figured it out- I was.
  4. Output : DateTime now form : 2019-09-02T10:36:47+00:00 Note : The output depends on the time at which the code runs on your system
  5. ruby-on-rails - rails - ruby timestamp to date . Worin besteht in Ruby on Rails der Unterschied zwischen DateTime, Timestamp, Time und Date? (2) Nach meiner Erfahrung ist es immer voller Gefahren und Schwierigkeiten, die richtigen Daten zu erhalten. Ruby und Rails haben mich immer wieder ausgeschlossen, wenn auch nur wegen der überwältigenden Anzahl von Optionen. Ich habe nie eine Idee.
  6. 注:本文由純淨天空篩選整理自mayank5326大神的英文原創作品 Ruby | DateTime to_time() function 。非經特殊聲明,原始代碼版權歸原作者所有,本譯文的傳播和使用請遵循署名-相同方式共享 4.0 國際 (CC BY-SA 4.0)協議。 ©2008-2021 | 純淨天空 | 簡體 | 繁體 | 聯係我們 | 京ICP備15018527號-1 | 讚助商 |.
  7. Die tolle Ruby -Funktion time_ago_in_words bzw. distance_of_time_in_words und distance_of_time_in_words_to_now aus dem Rails-Framework zeigt die vergangene. Toggle navigation. Software . Web Analytics; Call To Actions; Umfragen; Preise; Hilfe Login; Kostenlos testen; Ruby On Rails: Date Helper-Funktion time_ago_in_words in deutsch. von Nico Puhlmann . Shares. Die tolle Ruby-Funktion time_ago.

Ruby DateTime to_datetime() function - GeeksforGeek

Time#at is provided by Ruby and not by Rails or Active Support. Ruby's lack of documentation.. While looking at the solution to this parsing problem, I checked documentation of Time::at method on ruby-doc.org. I came across this: If in argument is given, the result is in that timezone or UTC offset, or if a numeric argument is given, the result is in local time. This led me down to Ruby's. Time is an abstraction of dates and times. Time is stored internally as the number of seconds with fraction since the Epoch, January 1, 1970 00:00 UTC.Also see the library module Date. The Time class treats GMT (Greenwich Mean Time) and UTC (Coordinated Universal Time) as equivalent.GMT is the older way of referring to these baseline times but persists in the names of calls on POSIX systems Returns a new DateTime where one or more of the elements have been changed according to the options parameter. The time options (:hour, :min, :sec) reset cascadingly, so if only the hour is passed, then minute and sec is set to 0.If the hour and minute is passed, then sec is set to 0. The options parameter takes a hash with any of these keys: :year, :month, :day, :hour, :min, :sec, :offset.

How to convert a unix timestamp (seconds since epoch) to

How to get UTC timestamp in Ruby? - Stack Overflo

  1. Ein kleiner Fakt jedoch zuerst: Die Ausgabe von ISO 8601 in Ruby ähnelt der Ausgabe von Combined date and time aus der Wikipedia-Seite von ISO 8601. Sie haben eine Zeichenfolge und müssen diese in ein Time Objekt konvertieren, das Sie mit to_time
  2. The unix time stamp is a way to track time as a running total of seconds. This count starts at the Unix Epoch on January 1st, 1970 at UTC. Therefore, the unix time stamp is merely the number of seconds between a particular date and the Unix Epoch. It should also be pointed out (thanks to the comments from visitors to this site) that this point in time technically does not change no matter.
  3. Ruby/Rails: converting a Date to a UNIX timestamp (4) Solution for Ruby 1.8 when you have an arbitrary DateTime object: 1.8.7-p374 :001 > require 'date' => true 1.8.7-p374 :002 > DateTime.new(2012, 1, 15).strftime('%s') => 1326585600 The suggested options of using to_utc or utc to fix the local time offset does not work. For me I found using Time.utc() worked correctly and the code.

Ruby DateTime Guide to Various Ruby DateTime Functions

  1. RubyでDateTimeオブジェクトとTimeオブジェクトをどのように変換しますか? ruby datetime time — 読み取り専用 ソース 1. これが別の質問であるかどうかはわかりませんが、日付と時刻をどのように変換しますか? — Andrew Grimm . 8. 受け入れられた最高の評価の回答は、Rubyの最新バージョンではもはや.
  2. Ruby Date & Time. Ruby has Mainly three classes related to date and time in its documentation. Date; DateTime; Time # Date. Ruby date provides two classes, Date and DateTime. To understand the concept of date, first we need to understand some terms. Calendar date: The calendar date is a particular day within a calendar month within a year. Ordinal date: The ordinal date is a particular day of.
  3. ute (00..60) %U - Week number of the current year.
Ruby On Rails How To Change Time Zone To Pacific

Newer versions of Ruby (2.0+) do not really have significant differences between the two classes. Some libraries will use one or the other for historical reasons, but new code does not necessarily need to be concerned. Picking one for consistency is probably best, so try and mesh with what your libraries expect. For example, ActiveRecord prefers DateTime Flowdock - Team Inbox With Chat for Software Developers. Check out how the team behind APIdock connects Pivotal Tracker, GitHub and group chat to one workflow.Pivotal Tracker, GitHub and group chat to one workflow Convert date / time formats on the fly. Timestamps in milliseconds and other units. Tutorials: System.currentTimeMillis() · What is a Unix Timestamp · What is UTC: Timezones, Unix timestamps in milliseconds & UTC. Java programming examples and explanations. Sync Service: Minutes since Epoch: Free synchronization web service. 3rd party time authority. Used in games, trial software, internet. DateTime.strptime can handle seconds since epoch. The number must be converted to a string: require 'date' DateTime.strptime(1318996912,'%s' Ruby to parse an incomplete date. Notice that the time '02:36.01′ is very sparse. It does not provide a date, nor does it provide a timezone reference. Presumably, we have to assume that the date is the current day, and only after examining the server settings and how it constructs log files do we know the real timezone. Let's add the following processing to our simple.conf file inside.

Unixタイムスタンプ(エポックからの秒数)をRuby DateTimeに変換するにはどうすればよいですか? ruby datetime timestamp — トロナサン ソース 回答: 354 . DateTime.strptimeエポック以降の秒を処理できます。数値は文字列に変換する必要があります: require 'date' DateTime. strptime (1318996912, '%s') — Steenslag. Ruby 3.0.0 リファレンスマニュアル; ライブラリ一覧; dateライブラリ; Timeクラス; to_date instance method Time#to_dat Ruby 3.0.0 リファレンスマニュアル ; ライブラリ一覧 DateTime 要約. 日付だけでなく時刻も扱える Date のサブクラスです。 DateTime は deprecated とされているため、 Timeを使うことを推奨します。 簡単なつかいかた require 'date' a = DateTime.new(1993, 2, 24, 12, 30, 45) b = DateTime.parse('1993-02-24T12:30:45') b += 10 b - a. Active Record Timestamp Active Record automatically timestamps create and update operations if the table has fields named created_at/created_on or updated_at/updated_on. index Ruby on Rails 6.1.3.

ruby documentation: Add/substract days to DateTime. Example. DateTime + Fixnum (days quantity). DateTime.new(2015,12,30,23,0) + 1 # => #<DateTime: 2015-12-31T23:00:00. 「Active Support」はRubyの組み込みクラスやモジュールなどの機能を拡張してくれるコンポーネント ; Railsに同梱されているが、単体のGemとしてもインストールできるので試してみる。 Time, Date, DateTime に、共通の便利メソッドが追加される。 ここでは、例としてTimeクラスで試してみる Active Support の.

Note that Date can be converted to Time without loosing a lot of information. However, in a lot of cases we do not care about these details - we just need a method that conversion. You can paste the following snippet in your ruby-code - tested with ruby 1.8.7 (2010-08-16 patchlevel 302 Learning Center › Quick Tips › Josh Shupack's Quick Tips › Ruby time format for timest... Ruby time format for timestamp in a filename Ruby Timestamp Filenames Josh Shupack ★ ★ ★ ★ ★ View Profile Sign Up to Contact 104 sessions given since Oct 30, 2014. All three are Ruby classes used for working with time. Time is built-in to Ruby; Date and DateTime come from the standard library date. Time.now #=> 2020-12-31 06:23:24 +0000 require 'date' Date. The Date and DateClass classes reside in the Ruby date library. Before these classes and their respective methods can be used, the date library must be included using the require directive: require 'date' Working with Dates in Ruby. Dates are handled in Ruby using the Date class. An instantiated Date object contains day, year and month values. A Date object may be initialized with day, month. Ruby Tricks 5 - Adding a Time Zone to a Date Time String. Every now and then, we get data that has a date time string in the local time zone but with no time zone specified. This short note is on how to attach the correct time zone to the data so that it can be used in systems that rely on the time zone. The problem is common - we might have data that looks like 2020-07-21 16:30 or even like.

Date, Time, DateTime in Ruby and Rails Tech Notes from

Ruby supports the date and time interfaces you might be used to from other programming languages, but on top of them are Ruby-specific idioms that make programming easier. In this chapter, we'll show you how to use those interfaces and idioms, and how to fill in the gaps left by the language as it comes out of the box. Ruby actually has two different time implementations. There's a set of. 注:本文由纯净天空筛选整理自mayank5326大神的英文原创作品 Ruby | DateTime to_time() function 。非经特殊声明,原始代码版权归原作者所有,本译文的传播和使用请遵循署名-相同方式共享 4.0 国际 (CC BY-SA 4.0)协议。 ©2008-2021 | 纯净天空 | 简体 | 繁体 | 联系我们 | 京ICP备15018527号-1 | 赞助商 |. ruby Time.zone Server timezone It's a system time of current server, mostly UTC but sometimes can be a time of datacenter location. In development it's developer's machine timezone. You may need it if you want to make a cron task. Cron works in server's timezone. To calculate it I have handy function what I use with gem whenever: # Your business timezone Time.zone = Asia/Jakarta def to. On 01 Feb 2007, at 2:55 PM, _Kevin wrote: How can I convert a string such as '2007-01-31 12:22:26' to a Time object? the ruby-units gem also has a helper for thi L => 08: 37: 48.000 Local time with decimal fraction, full stop as decimal sign (extended) % H % M % S % z => 083748-0600 Local time and the difference from UTC (basic) % T %: z => 08: 37: 48-06: 00 Local time and the difference from UTC (extended) % Y % m % dT % H % M % S % z => 20071119 T083748-0600 Date and time of day for calendar date (basic) % FT % T %: z => 2007-11-19T08: 37: 48-06: 00.

时间戳(Unix timestamp)转换工具ruby-on-rails - Rieles 4: Lista de tipos de datos disponibles

Ruby DateTime to_time() function - GeeksforGeek

Since Ruby's Time class implements a proleptic Gregorian calendar and has no concept of calendar reform there's no way to express this with Time objects. This is where DateTime steps in: shakespeare = DateTime. iso8601 ('1616-04-23', Date:: ENGLAND) #=> Tue, 23 Apr 1616 00:00:00 +0000 cervantes = DateTime. iso8601 ('1616-04-23', Date:: ITALY) #=> Sat, 23 Apr 1616 00:00:00 +0000. Already you. Time difference in Ruby on Rails. Anderson Dias . Follow. Dec 8, 2015 · 1 min read. How many minutes has passed since the beginning of this job? How many hours do we have to wait? If you've. Random Ruby and Rails tips. This blog is dedicated to deliver short, interesting and practical tidbits of the Ruby language and Ruby on Rails framework. Read more... Your submissions are more than welcome! Submit a tip Get a random tip RSS Twitter Archive. May 2 '11 ★ Parse a string into a DateTime object. Controlled. Just as you can format a string from a Time object with Time#strftime.

Ruby datetime: Manipulating Time and Dates Made Simple

Ruby strftime function is an important function that is used to format date and time in Ruby. We assume that you know the basics of Ruby, else we recommend you take this beginners course on Ruby before we go further. Time and Date in Ruby. Date and Time are required in many applications. Developers use Date and Time functions to write useful and powerful code. In Ruby, the time class is used. Related methods. Class methods (100) ajd_to_amjd (= v1_8_7_330); ajd_to_jd (= v1_8_7_330); amjd_to_ajd (= v1_8_7_330); civil; civil_to_jd (= v1_8_7_330); commercia

strptime() 函数_C/C++_冷月醉雪的博客-CSDN博客

ruby - convert String to DateTime - Stack Overflo

class DateTime; instance method Time#httpdate; この記事を気に入って頂けたら いいね、又はフォローをお願いします。 @class_Techさんをフォロー. 検索: CATEGORIES. JavaScript (1) jQuery (1) PHP (3) WordPress (3) Ruby (9) Ruby on Rails (3) Web開発 (2) お知らせ (2) RECENT POSTS. jQueryのval()を使って各フォーム要素の値を取得する. For example, to get the current date and time you can use: SELECT GETDATE(); Result: 2020-07-02 19:21:00.700. This shows the current date and time, down to fractional seconds. But what if you only want to see the date (day, month, and year) and none of the time component? There are many ways you can do this. SQL Convert Datetime to Date. The easiest and fastest way to convert a DATETIME to a. Ruby provides two classes to manage time: Time and DateTime. Since Ruby 1.9.3 there are fewer differences between the two libraries, with Time covering concepts of leapseconds and daylight saving time. For the rest of this article, Time will be used in all the examples. TZInfo is another time zone library, which provides daylight-saving-aware transformations between times in different time.

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strftime (DateTime) - APIdoc

When a user submits a form, Rails recognizes commonly used date formats such as June 28, 2018, Thurs Jun 28, 2018, 2018-06-28, 28/6/2018 (but not 6/28/2018), etc. Rails is expecting a date, time or datetime format based on the data type of the field and converts the submitted data into a Ruby date, time, or datetime object. Then when it saves the object to the database it converts it to the. Similarly, format 12 is shown with 10 significant digits, but the date/time functions will really accept as many or as few digits as are necessary to represent the Julian day number. 3. Modifiers. The time value can be followed by zero or more modifiers that alter date and/or time. Each modifier is a transformation that is applied to the time value to its left. Modifiers are applied from left. I believe every ruby developer has faced time comparison issue at least once and tests are one of the possible areas where it may happen. RSpec message like this may confuse: confirmed_at should have been changed to Mon, 24 Mar 2014 09:47:22 UTC, but is now Mon, 24 Mar 2014 09:47:22 UTC What's wrong? Investigation Let's create two Time objects: > t1, t2 = Time.now, Time.now => [2014-03-27.

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Ruby convert Mysql timestamp to Mysql datetime - Stack

This timestamp format is used in web browsers such as chrome & safari, So how we convert human readable date & Unix time in Ruby/Rails. Chrome's base time is 01/01/1601 00:00:00 . To calculate local time, Chrome time has to be converted to seconds by dividing by one million, and then the seconds differential between 01/01/1601 00:00:00 and 01/01/1970 00:00:00 must be subtracted RubyでDateTimeオブジェクトとTimeオブジェクトをどのように変換しますか? ruby datetime time. ソース. 回答. anshul. 2008年11月11日. 187. require 'time' require 'date' t = Time.now d = DateTime.now dd = DateTime.parse(t.to_s) tt = Time.parse(d.to_s) the Tin Man. 2011年12月15日. 63. Rubyエコシステムの状態の更新として、 Date 、 DateTime. Ruby 日期 & 时间(Date & Time) Time 类在 Ruby 中用于表示日期和时间。它是基于操作系统提供的系统日期和时间之上。该类可能无法表示 1970 年之前或者 2038 年之后的日期。 本教程将让您熟悉日期和时间的所有重要的概念。 创建当前的日期和时间 下面_来自Ruby 教程,w3cschool编程狮

数据库迁移(SQL SERVER导入数据到MySql)_数据库_Hello ^_^ Word -CSDN博客

Tags: Date And Time Processing, Projects. Newsletter; Advertise; Submit; Categories; Login ; Subscribe; Submit; Categories; About; Login; Awesome Ruby. All Categories. Date and Time Processing. local_time Rails engine for cache-friendly, client-side local time. Source Code Changelog Suggest Changes Popularity. 7.1. Growing. Activity. 0.0. Stable. Stars 1,639 Watchers 54 Forks 109 Last Commit 4. date仅存储日期, time仅存储日期,而datetime两者都存储。 DATETIME 和 TIMESTAMP 之间的区别更加细微: DATETIME 的格式设置为 YYYY-MM-DD HH:MM:SS 。 有效范围是从1000年到9999年(以及介于两者之间的所有时间 Ruby time date datetime strftime. 日時、時間を扱える。Datetimeは両方、Dateは日付、Timeは時間を管理。 うるう年、1ヶ月ごとの日数、曜日などの管理も可能。 Rails独自の便利なメソッドも用意されてる。より可読性、安全性の高い。 Date クラス(日付) 日付を扱うクラス。 require date が必要。 例)Dateクラス. RubyでDateTimeクラスを使う方法について解説します。 そもそもRubyについてよく分からないという方は、Rubyとは何なのか解説した記事を読むとさらに理解が深まります。 なお本記事は、TechAcademyのオンラインブートキャンプRuby講座の内容をもとに紹介しています 怎样使用ruby将字符串转化成时间变量呢?非常简单,只需要用到Time.mktime函数即可。 比如一串字符串,2012,12,12,13,38,45 我们将这些字符串转化成2012年12月12日13时38分45秒,只需要这么做: Time.mktime(2012,12,12,13,38,45) => Wed Dec 12 13:38:45 +0800 2012 时区为当地时区 DateTime.nowをTime.zone.nowに差し替えたら計算結果が違う!みたいなことになったので初歩的な内容だけどメモ。 環境 $ rbenv version 2.3.4 $ rails -v Rails 4.2.8 検証 # Dateオブジェクトに10加算すると10日加算される [39] pry (main) > today = Date:: today => Tue, 18 Apr 2017 [40] pry (main) > today + 10 => Fri, 28 Apr 2017 # DateTime.

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