Most rich text editors for the web use JavaScript. These are some popular ones you could consider

1. [jwysiwig][1]
2. [markitup][2] 
3. [Redactor][3] (This is great jQuery based wysiwyg editor that also has a Rails extension I&#39;ve linked to below.)
4. [Bootstrap-wysihtml5][4] (If you&#39;re looking for a Twitter Bootstrap style editor)

Of course, you could also consider heavy-weight alternatives like TinyMCE or CKEditor, if your needs are such.

**Ruby on Rails Solutions**

If you need to able add images to your textarea through a Ruby on Rails library, such as [Paperclip][5] or [Carrierwave][6], you may consider one of these

1. [rails-ckeditor][7] 
2. [Mercury][8] ([Railscast][9])
3. [rails_tiny_mce][10]
4. [redactor-rails][11]


**The Problem with using a  usual JavaScript Editor**

Most javascript editors will prompt for a URL when you try to add an image to your textarea, so if you need to do so, you may have to upload the image elsewhere and provide the editor with the URL.

There is however one JavaScript editor I found, http://nicedit.com/, that does an AJAX upload to http://imageshack.us when you add an image. Of course, the images that are served will become totally dependent on imageshack which may or may not work for you. It really depends on your scenario.  


  [1]: https://github.com/akzhan/jwysiwyg
  [2]: http://markitup.jaysalvat.com/home/
  [3]: http://redactorjs.com/
  [4]: http://jhollingworth.github.com/bootstrap-wysihtml5/
  [5]: https://github.com/thoughtbot/paperclip
  [6]: https://github.com/jnicklas/carrierwave
  [7]: https://github.com/galetahub/rails-ckeditor
  [8]: http://jejacks0n.github.com/mercury/
  [9]: http://railscasts.com/episodes/296-mercury-editor
  [10]: https://github.com/sandipransing/rails_tiny_mce/tree/rails_3
  [11]: https://github.com/SammyLin/redactor-rails
  [12]: http://www.queness.com/post/212/10-jquery-and-non-jquery-javascript-rich-text-editors

I use [CKEditor](http://ckeditor.com/)
 
I would advise you to install the [rails_admin](https://github.com/sferik/rails_admin/) gem and follow the instructions in the README to set-up CKEditor

It&#39;s really easy to use, [looks good](http://ckeditor.com/demo) and is regularly maintained

If you prefer not to use rails_admin gem, then you can use one of the many [rails ckeditor gems](https://github.com/galetahub/rails-ckeditor)

good luck

&gt; **Possible Duplicate:**  
&gt; [How to split a string in C++?](https://stackoverflow.com/questions/236129/how-to-split-a-string-in-c)  

&lt;!-- End of automatically inserted text --&gt;

I need to split a string by single spaces and store it into an array of strings. I can achieve this using a istringstream, but what I am not being able to achieve is this:

I want every space to terminate the current word. So, if there are two spaces consecutively, one element of my array should be blank.

For example:

(underscore denotes space)

    This_is_a_string.
    gets split into:
    A[0] = This
    A[1] = is
    A[2] = a
    A[3] = string.
    
    This__is_a_string.
    gets split into:
    A[0] = This
    A[1] = &quot;&quot;
    A[2] = is
    A[3] = a
    A[4] = string.

How can I implement this?


Split string by single spaces

&gt; **Possible Duplicate:**  
&gt; [What’s the best way to find the inverse of datetime.isocalendar()?](https://stackoverflow.com/questions/304256/whats-the-best-way-to-find-the-inverse-of-datetime-isocalendar)  

&lt;!-- End of automatically inserted text --&gt;

I have an ISO 8601 year and week number, and I need to translate this to the date of the first day in that week (Monday). How can I do this?

[datetime.strptime()][1] takes both a `%W` and a `%U` directive, but neither adheres to the ISO 8601 weekday rules that [datetime.isocalendar()][2] use.

**Update:** [Python 3.6][3] supports the `%G`, `%V` and `%u` directives also present in libc, allowing this one-liner:


    &gt;&gt;&gt; datetime.strptime(&#39;2011 22 1&#39;, &#39;%G %V %u&#39;)
    datetime.datetime(2011, 5, 30, 0, 0)


**Update 2**: [Python 3.8][4] added the `fromisocalendar()` method, which is even more intuitive:

    &gt;&gt;&gt; datetime.fromisocalendar(2011, 22, 1)
    datetime.datetime(2011, 5, 30, 0, 0)


  [1]: http://docs.python.org/library/datetime.html#strftime-strptime-behavior
  [2]: http://docs.python.org/library/datetime.html#datetime.datetime.isocalendar
  [3]: https://docs.python.org/3.6/whatsnew/3.6.html#datetime
  [4]: https://docs.python.org/3/library/datetime.html#datetime.date.fromisocalendar

Get date from ISO week number in Python

I am building a Rails 3 app with blogging, commenting, and other functionality that require the users to input text. 

My question is whether it is a better idea to use a Javascript rich text editor or not. What would be the pros and cons. If it is a recommended approach:

1. Which editors are best?
2. How do I use them in my Rails forms?

thanks in advance,

Steve

Rails 3 and Rich text editor

I am building a Rails 3 app with blogging, commenting, and other functionality that require the users to input text.
My question is whether it is a better idea to use a Javascript rich text editor or not. What would be the pros and cons. If it is a recommended approach:
<ol>
<li>Which editors are best?</li>
<li>How do I use them in my Rails forms?</li>
</ol>
thanks in advance,
Steve

I have a javascript function:


    function myFunction(value1,value2,value3)
    {
         //Do stuff and 
    
         value2=somevalue2 //to return
         value3=somevalue3 //to return
    }

function call in Code:
....

    myFunction(&quot;1&quot;,value2,value3);
    
    if(value2 &amp;&amp; value3)
    {
    //Do some stuff
    }

in this scenario how to pass value2 and value3 to the called method or how to return values in Java script.




How to return values in javascript

Trying to check input against a regular expression.

The field should only allow alphanumeric characters, dashes and underscores and should NOT allow spaces.

However, the code below allows spaces.

What am I missing?

    var regexp = /^[a-zA-Z0-9\-\_]$/;
    var check = &quot;checkme&quot;;
    if (check.search(regexp) == -1)
        { alert(&#39;invalid&#39;); }
    else
        { alert(&#39;valid&#39;); }



Alphanumeric, dash and underscore but no spaces regular expression check JavaScript

How do I use JavaScript variables as a parameter in a jQuery selector?

    &lt;script type=&quot;text/javascript&quot;&gt;
    $(function(){    
      $(&quot;input&quot;).click(function(){
        var x = $(this).attr(&quot;name&quot;);

        $(&quot;input[id=x]&quot;).hide();    
      });    
    });
    &lt;/script&gt;
    
    &lt;input type=&quot;text&quot; id=&quot;bx&quot;/&gt;&lt;input type=&quot;button&quot; name=&quot;bx&quot;/&gt;
    &lt;input type=&quot;text&quot; id=&quot;by&quot;/&gt;&lt;input type=&quot;button&quot; name=&quot;by&quot;/&gt;


Basically what I want to do is to be able to hide the element which has an `id` that is equal to the name of the element that is being clicked.

How to use JavaScript variables in jQuery selectors?

I&#39;m a newb to back-end code and I&#39;m trying to create a function that will respond to me a JSON string. I currently have this from an example

    function random(response) {
      console.log(&quot;Request handler &#39;random was called.&quot;);
      response.writeHead(200, {&quot;Content-Type&quot;: &quot;text/html&quot;});
      
      response.write(&quot;random numbers that should come in the form of json&quot;);
      response.end();
    }

This basically just prints the string &quot;random numbers that should come in the form of JSON&quot;. What I want this to do is respond with a JSON string of whatever numbers. Do I need to put a different content-type? should this function pass that value to another one say on the client side?

Thanks for your help!

Responding with a JSON object in Node.js (converting object/array to JSON string)

A while ago I was making some test in JavaScript, 
and played with a code to get the text of all elements with a certain class.
 
Now I was trying to make something like this but obtain all elements by a certain type, for example all elements `type=&quot;text&quot;`

Is there any way to do this in JavaScript or should I use jQuery?


	var xx = document.getElementsByClassName(&quot;class&quot;);
	for (i=0;i&lt;xx.length;i++){
		var str=xx[i].innerHTML;
                alert(str);
	}


Accessing elements by type in JavaScript

Very simple question here - if migrations can get slow and cumbersome as an app gets more complex and if we have the much cleaner `rake db:schema:load` to call instead, why do migrations exist at all?

If the answer to the above is that migrations are used for version control (a stepwise record of changes to the database), then as an app gets more complex and `rake db:schema:load` is used more instead, do they continue to maintain their primary function?

---

### Caution:

From the answers to this question: `rake db:schema:load` &lt;b&gt;will delete data&lt;/b&gt; on a production server so be careful when using it.

rake db:schema:load vs. migrations

After significant troubleshooting, I figured out that I needed to run `rake spec` once (I can abort with control-c) before I can run rspec directly (e.g. on a subset of our specs). We are running Rails 3.0.7 and RSpec 2.5.0.

Clearly, rake is running some important database setup tasks / code (we have custom code in the root level rails Rakefile and possibly other places).

**How can I run the rake test database setup tasks / code without running `rake spec`?**

In addition to being able to run rspec on a subset of files, I am using [specjour][1] to spread our specs across multiple cores (haven&#39;t had success with spreading them across the LAN yet), but I see the same behavior as for running rspec directly: I need to run `rake spec` on each test database (assuming two cores) before specjour works:

    rake spec TEST_ENV_NUMBER=1
    control-c (after tests start)
    rake spec TEST_ENV_NUMBER=2
    control-c (after tests start)
    specjour

Note: my config/database.yml has this entry for test (as is common for the parallel testing gems):

    test:
      adapter: postgresql
      encoding: unicode
      database: test&lt;%=ENV[&#39;TEST_ENV_NUMBER&#39;]%&gt;
      username: user
      password:

[parallel_tests][2] seems to set up its databases correctly, but many of our specs fail.

I should also mention that running `specjour prepare` causes Postgres to log errors that it can&#39;t find the databases, but it creates them (without tables). On a subsequent run, no errors are logged, but also no tables are created. It is possible that my whole issue is simply a bug in `prepare`, so I reported it on github.

I think that I can run arbitrary code on each specjour test database by setting `Specjour::Configuration.prepare` in .specjour/hooks.rb, so if there&#39;s any rake tasks or other code that I need to run, it may work there.

  [1]: https://github.com/sandro/specjour
  [2]: https://github.com/grosser/parallel_tests

How do I prepare test database(s) for Rails rspec tests without running rake spec?

Is there any way to detect if `#content_for` was actually applied to a `yield` scope in Rails?

A classic example being something like:

    &lt;title&gt;&lt;%= yield :page_title %&gt;&lt;/title&gt;

If a template doesn&#39;t set that with

    &lt;% content_for :page_title, &quot;Something here&quot; %&gt;

Is there a way to have the layout put something else there instead?

I tried defining it with `#content_for` in the layout itself, but this just causes the text to be doubled-up.  I also tried:

    &lt;%= (yield :page_title) or default_page_title %&gt;

Where `#default_page_title` is a view helper.

This just left the block completely empty.

Rails 3: yield/content_for with some default value?

I have a model Family with a method `location` which merges the `location` outputs of other objects, Members. (Members are associated with families, but that&#39;s not important here.) 

For example, given

* member_1 has `location` == &#39;San Diego (traveling, returns 15 May)&#39;
* member_2 has `location` == &#39;San Diego&#39;

Family.location might return &#39;San Diego (member_1 traveling, returns 15 May)&#39; The specifics are unimportant.

To simplify the testing of Family.location, I want to stub Member.location. However, I need it to return two different (specified) values as in the example above. Ideally, these would be based on an attribute of `member`, but simply returning different values in a sequence would be OK. Is there a way to do this in RSpec?

It&#39;s possible to override the Member.location method within each test example, such as

    it &quot;when residence is the same&quot; do 
      class Member
        def location
          return {:residence=&gt;&#39;Home&#39;, :work=&gt;&#39;his_work&#39;} if self.male?
          return {:residence=&gt;&#39;Home&#39;, :work=&gt;&#39;her_work&#39;}
        end
      end
      @family.location[:residence].should == &#39;Home&#39;
    end

but I doubt this is good practice. In any case, when RSpec is running a series of examples it doesn&#39;t restore the original class, so this kind of override &quot;poisons&quot; subsequent examples.

So, is there a way to have a stubbed method return different, specified values on each call?

Can RSpec stubbed method return different values in sequence?

I have a rails model which has 7 numeric attributes filled in by the user via a form.

I need to validate the presence of each of these attributes which is obviously easy using

    validates :attribute1, :presence =&gt; true
    validates :attribute2, :presence =&gt; true
    # and so on through the attributes


However I also need to run a custom validator which takes a number of the attributes and does some calculations with them. If the result of these calculations is not within a certain range then the model should be declared invalid.

On it&#39;s own, this too is easy

    validate :calculations_ok?
    
    def calculations_ok?
      errors[:base] &lt;&lt; &quot;Not within required range&quot; unless within_required_range?
    end
    
    def within_required_range?
      # check the calculations and return true or false here
    end

However the problem is that the method &quot;validate&quot; always gets run before the method &quot;validates&quot;. This means that if the user leaves one of the required fields blank, rails throws an error when it tries to do a calculation with a blank attribute.

So how can I check the presence of all the required attributes first?

Content Type	Original Author	Original Content on Stackoverflow
Question	Steve Harman	View Question on Stackoverflow
Solution 1 - Javascript	Shreyas	View Answer on Stackoverflow
Solution 2 - Javascript	stephenmurdoch	View Answer on Stackoverflow

Rails 3 and Rich text editor

Javascript Problem Overview

Javascript Solutions

Solution 1 - Javascript

Solution 2 - Javascript

Get date from ISO week number in Python

Split string by single spaces

Attributions