You can use: 

    10.minutes.ago
    2.days.since

Or in your views you have the helpers:

    distance_of_time_in_words(from_time, to_time)
    time_ago_in_words(from_time)

Check [the API][1] for details and more options.


  [1]: http://api.rubyonrails.org/classes/ActionView/Helpers/DateHelper.html#M002261

You can use available methods to get the time in past or future using [`ago`][1], [`since`][2] alias for `from_now` and many available methods

    
    Time.current
    #=&gt; Tue, 20 Sep 2016 15:03:30 UTC +00:00

    2.minutes.ago
    #=&gt; Tue, 20 Sep 2016 15:01:30 UTC +00:00

    2.minutes.since
    #=&gt; Tue, 20 Sep 2016 15:05:30 UTC +00:00 

    1.month.ago
    #=&gt; Sat, 20 Aug 2016 15:03:30 UTC +00:00

    1.year.since
    #=&gt; Wed, 20 Sep 2017 15:03:30 UTC +00:00 
Check all the available methods in [Time][3] class


  [1]: http://api.rubyonrails.org/v4.2/classes/Time.html#method-i-ago
  [2]: http://api.rubyonrails.org/v4.2/classes/Time.html#method-i-since
  [3]: http://api.rubyonrails.org/v4.2/classes/Time.html

[distance_of_time_in_words](http://api.rubyonrails.org/classes/ActionView/Helpers/DateHelper.html#method-i-distance_of_time_in_words):

    from_time = Time.now

    distance_of_time_in_words(from_time, from_time + 50.minutes) # =&gt; about 1 hour
    distance_of_time_in_words(from_time, 50.minutes.from_now) # =&gt; about 1 hour
    distance_of_time_in_words(from_time, from_time + 15.seconds) # =&gt; less than a minute
    distance_of_time_in_words(from_time, from_time + 15.seconds, include_seconds: true) # =&gt; less than 20 seconds

[time_ago_in_words](http://api.rubyonrails.org/classes/ActionView/Helpers/DateHelper.html#method-i-time_ago_in_words):

    time_ago_in_words(3.minutes.from_now) # =&gt; 3 minutes
    time_ago_in_words(3.minutes.ago) # =&gt; 3 minutes
    time_ago_in_words(Time.now - 15.hours) # =&gt; about 15 hours


I am using a jQuery UI dialog. If it is open, I want to do one thing. If it is closed, I want to do another. 

My question is, how do I detect if a jQuery UI dialog box is open or not?


Detect if a jQuery UI dialog box is open

Consider the following array:

&lt;!-- language: lang-none --&gt;

    /www/htdocs/1/sites/lib/abcdedd
    /www/htdocs/1/sites/conf/xyz
    /www/htdocs/1/sites/conf/abc/def
    /www/htdocs/1/sites/htdocs/xyz
    /www/htdocs/1/sites/lib2/abcdedd

what is the shortest and most elegant way of detecting the *common base path* - in this case

&lt;!-- language: lang-none --&gt;

    /www/htdocs/1/sites/

and removing it from all elements in the array?

&lt;!-- language: lang-none --&gt;

    lib/abcdedd
    conf/xyz
    conf/abc/def
    htdocs/xyz
    lib2/abcdedd

Tetris-ing an array

I was wondering if there&#39;s a way in Rails to calculate time stamp like - half a minute ago, 2 minute ago, 1 day ago etc. Something like twitter real time date stamp.

I want to know if Ruby/Rails has a built-in function for such date-time conversion?

&quot;Ago&quot; date/time functions in Ruby/Rails

<p>I was wondering if there's a way in Rails to calculate time stamp like - half a minute ago, 2 minute ago, 1 day ago etc. Something like twitter real time date stamp.</p>
<p>I want to know if Ruby/Rails has a built-in function for such date-time conversion?</p>


I&#39;m creating a new engine for a rails 3 application. As you can guess, this engine is in the lib directory of my application.

However, i have some problems developing it. Indeed, I need to restart my server each time I change something in the engine.

Is there a way to avoid this ?

Can I force rails to completely reload the lib directory or a specific file and his requirements for each request ?

Thanks for your help :)

Ruby on Rails 3 - Reload lib directory for each request

I need an SQL statement that check if one condition is satisfied:

    SELECT * FROM my_table WHERE my_table.x=1 OR my_table.y=1

I want to do this the &#39;Rails 3&#39; way. I was looking for something like:

    Account.where(:id =&gt; 1).or.where(:id =&gt; 2)

I know that I can always fallback to sql or a conditions string. However, in my experience this often leads to chaos when combining scopes. What is the best way to do this?

Another related question, is how can describe relationship that depends on an OR condition. The only way I found:

    has_many :my_thing, :class_name =&gt; &quot;MyTable&quot;,  :finder_sql =&gt; &#39;SELECT my_tables.* &#39; + &#39;FROM my_tables &#39; +
    &#39;WHERE my_tables.payer_id = #{id} OR my_tables.payee_id = #{id}&#39;

However, these again breaks when used in combinations. IS there a better way to specify this?

Ruby on Rails 3 howto make &#39;OR&#39; condition

You can get the `current_user`&#39;s permissions from a view or controller using `can?` in this fashion:

      &lt;% if can? :update, @article %&gt;
        &lt;%= link_to &quot;Edit&quot;, edit_article_path(@article) %&gt;
      &lt;% end %&gt;

How can I access this functionality from a model using this syntax:

    user.can?(:update, @article)

Access CanCan&#39;s `can?` method from a model

I have model Person that has many Images, where images has a Paperclip attachment field called data, an abbreviated version displayed below:

    class Person
      has_many :images
      ...
    end

    class Image
      has_attached_file :data
      belongs_to :person
      ...
    end


Person is required to have at least one Image attached to it.

When using FactoryGirl, I have code akin to the following:

    Factory.define :image do |a|
      a.data { File.new(File.join(Rails.root, &#39;features&#39;, &#39;support&#39;, &#39;file.png&#39;)) }
      a.association :person
    end

    Factory.define :person do |p|
      p.first_name &#39;Keyzer&#39;
      p.last_name &#39;Soze&#39;
      p.after_create do |person|
        person.assets = [Factory.build(:image, :person =&gt; person)]
      end
      # p.images {|images| [images.association(:image)]}
    end

(N.B. I have also tried the code commented out above was also tried)
Most of the time when I run cucumber features, I get an error akin to the following:
&gt; No such file or directory - /tmp/stream,9887,0.png (Errno::ENOENT)
&gt;
&gt; ...

Sometimes the tests run successfully.

Can anyone tell me what the problem is I am having here or how they use FactoryGirl and Paperclip together to achieve something like what I am trying to achieve?

I am using Rails 3.

How Do I Use Factory Girl To Generate A Paperclip Attachment?

Delayed::Job&#39;s auto-retry feature is great, but there&#39;s a job that I want to manually retry now. Is there a method I can call on the job itself like...

    Delayed::Job.all[0].perform

or run, or something. I tried a few things, and combed the documentation, but couldn&#39;t figure out how to execute a manual retry of a job.





Manually Retry Job in Delayed_job

I just had a quick question regarding loops in Ruby. Is there a difference between these two ways of iterating through a collection?

    # way 1
    @collection.each do |item|
      # do whatever
    end

    # way 2
    for item in @collection
      # do whatever
    end

Just wondering if these are exactly the same or if maybe there&#39;s a subtle difference (possibly when `@collection` is nil).

&quot;for&quot; vs &quot;each&quot; in Ruby

I know in Ruby that I can use `respond_to?` to check if an object has a certain method.

But, given the class, how can I check if the instance has a certain method?

i.e, something like

    Foo.new.respond_to?(:bar)

But I feel like there&#39;s gotta be a better way than instantiating a new instance.


Given a class, see if instance has method (Ruby)

Are there any gems able to parse XLS and XLSX files? I&#39;ve found Spreadsheet and ParseExcel, but they both don&#39;t understand XLSX format.

Parsing XLS and XLSX (MS Excel) files with Ruby?

I have a CSV dumpfile from a Blackberry IPD backup, created using IPDDump.
The date/time strings in here look something like this
(where `EST` is an Australian time-zone):

```none
Tue Jun 22 07:46:22 EST 2010
```

I need to be able to parse this date in Python. At first, I tried to use the `strptime()` function from datettime.

    &gt;&gt;&gt; datetime.datetime.strptime(&#39;Tue Jun 22 12:10:20 2010 EST&#39;, &#39;%a %b %d %H:%M:%S %Y %Z&#39;)

However, for some reason, the `datetime` object that comes back doesn&#39;t seem to have any `tzinfo` associated with it.

I did read on [this page](http://www.enricozini.org/2009/debian/using-python-datetime/) that apparently `datetime.strptime` silently discards `tzinfo`, however, I checked the documentation, and I can&#39;t find anything to that effect documented [here](http://docs.python.org/library/datetime.html).

Is there any way to get `strptime()` to play nicely with timezones?

How to preserve timezone when parsing date/time strings with strptime()?

Why 1753? What do they have against 1752? My great great great great great great great grandfather would be very offended.

What is the significance of 1/1/1753 in SQL Server?

For example, on July 5, 2010, I would like to calculate the string

     July 5, 2010

How should this be done?

How do I get a string format of the current date time, in python?

I have a DateTime stored in universal time (UTC) of value **2010-01-01 01:01:01**.

I would like to display it in EST in this format **2010-01-01 04:01:01GMT-04:00**, however the &#39;K&#39; formatter for timezone doesn&#39;t work in ToString



datetime to string with time zone

I have a python datetime object (representing five minutes from now) which I would like to convert to UTC. I am planning to output it in RFC 2822 format to put in an HTTP header, but I am not sure if that matters for this question. I found some information on this site about converting time objects, and it looks simpler that way, but this time I really want to use datetime objects, because I am using timedeltas to adjust them:

I tried something like this:

    from datetime import datetime, timedelta

    now = datetime.now()
    fiveMinutesLater = datetime.now() + timedelta(minutes=5)
    fiveMinutesLaterUtc = ???

Nothing in the time or datetime module looks like it would help me. It seems like I may be able to do it by passing the datetime object through 3 or 4 functions, but I am wondering if there is a simpler way.

I would prefer not to use third-party modules, but I may if it is the only reasonable choice.

Content Type	Original Author	Original Content on Stackoverflow
Question	kapso	View Question on Stackoverflow
Solution 1 - Ruby on-Rails	Toby Hede	View Answer on Stackoverflow
Solution 2 - Ruby on-Rails	Deepak Mahakale	View Answer on Stackoverflow
Solution 3 - Ruby on-Rails	Dorian	View Answer on Stackoverflow

"Ago" date/time functions in Ruby/Rails

Ruby on-Rails Problem Overview

Ruby on-Rails Solutions

Solution 1 - Ruby on-Rails

Solution 2 - Ruby on-Rails

Solution 3 - Ruby on-Rails

Tetris-ing an array

Detect if a jQuery UI dialog box is open

Attributions