Use &lt;a href=&quot;http://www.ruby-doc.org/core-1.9.2/Enumerable.html#method-i-each_slice&quot;&gt;`Enumerable#each_slice`&lt;/a&gt;.

    a.each_slice(3).to_a

Or, to iterate (and not bother with keeping the array):

    a.each_slice(3) do |x,y,z|
      p [x,y,z]
    end

    a = (1..6).to_a
    a.each_slice(2).to_a # =&gt; [[1, 2], [3, 4], [5, 6]]
    a.each_slice(3).to_a # =&gt; [[1, 2, 3], [4, 5, 6]]
    a.each_slice(4).to_a # =&gt; [[1, 2, 3, 4], [5, 6]]

I have a CSV file with two columns: city and zipcode. I want to be able to copy this file into a PostgreSQL table using the `copy` command and at the same time auto generate the `id` value. 

The table has the following columns: `id`, `city`, and `zipcode`.

My CSV file has only: `city` and `zipcode`.


PostgreSQL copy command generate primary key id

I am trying to find a list of all the possible values I can pass to the attribute `event` of the `f:ajax` tag.

I know that I can also pass function names from my .js files, but what I need just the ones that come with JSF.

I only know about click mouseover and keyup, but I am sure there are more. Just don&#39;t know where to find them.









What values can I pass to the event attribute of the f:ajax tag?

&gt; **Possible Duplicate:**  
&gt; [Need to split arrays to sub arrays of specified size in Ruby](https://stackoverflow.com/questions/3864139/need-to-split-arrays-to-sub-arrays-of-specified-size-in-ruby)  

&lt;!-- End of automatically inserted text --&gt;

I&#39;m looking to take an array---say [0,5,3,8,21,7,2] for example---and produce an array of arrays, split every so many places.  If the above array were set to a, then

    a.split_every(3)

would return [[0,5,3],[8,21,7][2]]

Does this exist, or do I have to implement it myself?

Split array up into n-groups of m size?

> Possible Duplicate: 
> <a href="https://stackoverflow.com/questions/3864139/need-to-split-arrays-to-sub-arrays-of-specified-size-in-ruby" target="_blank" rel="noopener noreferrer">Need to split arrays to sub arrays of specified size in Ruby</a>

I'm looking to take an array---say [0,5,3,8,21,7,2] for example---and produce an array of arrays, split every so many places. If the above array were set to a, then
<pre><code class="hljs language-css">a.split_every(3)
</code></pre>
would return [[0,5,3],[8,21,7][2]]
Does this exist, or do I have to implement it myself?

I&#39;m working on a Rails application using HTTParty to make HTTP requests. How can I handle HTTP errors with HTTParty? Specifically, I need to catch HTTP 502 &amp; 503 and other errors like connection refused and timeout errors.

How can I handle errors with HTTParty?

I&#39;m trying to create a new file and things don&#39;t seem to be working as I expect them too. Here&#39;s what I&#39;ve tried:

    File.new &quot;out.txt&quot;
    File.open &quot;out.txt&quot;
    File.new &quot;out.txt&quot;,&quot;w&quot;
    File.open &quot;out.txt&quot;,&quot;w&quot;

According to everything I&#39;ve read online all of those should work but every single one of them gives me this:

    ERRNO::ENOENT: No such file or directory - out.txt

This happens from IRB as well as a Ruby script. What am I missing?


How to create a file in Ruby

I&#39;m trying to install the Command-T plugin.

I compiled vim following the instructions in this comment: https://stackoverflow.com/questions/3794895/installing-vim-with-ruby-support-ruby/3851435#3851435

So now there&#39;s the +ruby flag, but still when I try to use the plugin I get this error:

    command-t.vim could not load the C extension
    Please see INSTALLATION and TROUBLE-SHOOTING in the help              
    For more information type:    :help command-t

I have ruby on my system:

    &gt; ruby -v
    &gt; ruby 1.8.7 (2011-06-30 patchlevel 352) [x86_64-linux]

suggestions?

Vim Command-T plugin error: could not load the C extension

I&#39;m new to Mustache.

Many templating languages (e.g., **Django** / **Jinja**) will let you extend a &quot;parent&quot; template like so...

### base.html
    &lt;html&gt;&lt;head&gt;&lt;/head&gt;
        &lt;body&gt;
        {% block content %}{% endblock %}
        &lt;/body&gt;
    &lt;/html&gt;

### frontpage.html
    {% extends &quot;base.html&quot; %}
    {% block content %}&lt;h1&gt;Foobar!&lt;/h1&gt;{% endblock %}


### rendered frontpage.html
    &lt;html&gt;&lt;head&gt;&lt;/head&gt;
        &lt;body&gt;
        &lt;h1&gt;Foobar!&lt;/h1&gt;
        &lt;/body&gt;
    &lt;/html&gt;


I&#39;m aware of Mustache&#39;s *partials* (e.g., `{{&gt;content}}`), but those seem to be just *includes*.

Does template extension exist for Mustache? Or, failing that, is there at least some design pattern that effectively turns *includes* into template extension equivalents.

Can Mustache Templates do template extension?

Given an input of, for example,

    day = &#39;Monday&#39;

how can I calculate the date of the next `day`?


    def date_of_next(day)
      ...
    end


Ruby code to get the date of next Monday (or any day of the week)

I have tried using `console.log` so I can see the content of my array that contains multiple objects. However I get an error saying `console.log` is not an object etc. I&#39;m using jquery 1.6.2 and my array is like this:


    filters = {dvals:[{&#39;brand&#39;:&#39;1&#39;, &#39;count&#39;:&#39;1&#39;},
                      {&#39;brand&#39;:&#39;2&#39;, &#39;count&#39;:&#39;2&#39;}, 
                      {&#39;brand&#39;:&#39;3&#39;, &#39;count&#39;:&#39;3&#39;}]}

    console.log(filters);

What I want to to do is write out the contents of `array(filters)` to an alert box (that&#39;s what I thought `console.log` did) in the filters format. How do I do that?

console.log showing contents of array object

In C++11 you can use a range-based `for`, which acts as the `foreach` of other languages. It works even with plain C arrays:

    int numbers[] = { 1, 2, 3, 4, 5 };
    for (int&amp; n : numbers) {
        n *= 2;
    }

How does it know when to stop? Does it only work with static arrays that have been declared in the same scope the `for` is used in? How would you use this `for` with dynamic arrays?

How does the range-based for work for plain arrays?

I need to save on shared preferences some array of Strings and after that to get them. 
I tried this :

`prefsEditor.putString(PLAYLISTS, playlists.toString());` where playlists is a `String[]`

and to get :

`playlist= myPrefs.getString(PLAYLISTS, &quot;playlists&quot;);` where playlist is a `String` but it is not working.

How can I do this ? Can anyone help me?


Thanks in advance.

Put and get String array from shared preferences

I have an array of objects in Java, and I am trying to pull one element to the top and shift the rest down by one.

Assume I have an array of size 10, and I am trying to pull the fifth element. The fifth element goes into position `0` and all elements from 0 to 5 will be shifted down by one.

This algorithm does not properly shift the elements:

    Object temp = pool[position];
    						
    for (int i = 0; i &lt; position; i++) {				
        array[i+1] = array[i];
    }
    array[0] = temp;

How do I do it correctly?

Java, Shifting Elements in an Array

What is the reason why we cannot always use a HashMap, even though it is much more efficient than ArrayList or LinkedList in add,remove operations, also irrespective of the number of the elements.

I googled it and found some reasons, but there was always a workaround for using HashMap, with advantages still alive.


Content Type	Original Author	Original Content on Stackoverflow
Question	invaliduser	View Question on Stackoverflow
Solution 1 - Ruby	Platinum Azure	View Answer on Stackoverflow
Solution 2 - Ruby	maerics	View Answer on Stackoverflow

Split array up into n-groups of m size?

Ruby Problem Overview

Ruby Solutions

Solution 1 - Ruby

Solution 2 - Ruby

What values can I pass to the event attribute of the f:ajax tag?

PostgreSQL copy command generate primary key id

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