`Time.now.utc` is what you must be using.

I am making a vector of &quot;waypoints&quot; on the Arduino. Each waypoint is an object. The Arduino will obviously need to store multiple waypoints for waypoint navigation. But instead of storing these waypoints in a standard preprogrammed array, the user will need to be able to add, remove waypoints and move them around. Unfortunately the Arduino does not offer a vector type as a built-in library.

I am currently contemplating two options:

1. In *[Container for objects like C++ &#39;vector&#39;?][4]*, someone posted a general purpose library. It does not contain any index deletion, or movement operations. But it does contain some memory management strategies.

2. I have used *[malloc][5]*, dealloc, *[calloc][6]* in the past. But I do not like that option at all, especially with classes. But is this a better option in my senario?

Which one is a better path to go down?

  [4]: http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1289151491
  [5]: http://en.wikipedia.org/wiki/C_dynamic_memory_allocation#Overview_of_functions
  [6]: http://en.wikipedia.org/wiki/C_dynamic_memory_allocation#Overview_of_functions


Vectors in Arduino

Can we define functions in structs in C programming language?

Define functions in structs

&gt; **Possible Duplicate:**  
&gt; [How do I Convert DateTime.now to UTC in Ruby?](https://stackoverflow.com/questions/755669/how-do-i-convert-datetime-now-to-utc-in-ruby)  

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

How do I get current time in Date-time-milliseconds &amp; UTC? 
Ex. 2012-03-22T18:48:40.873Z

I tried - 

    Time.now.utc_offset.to_s
    Time.now.xs_datetime

Ruby - time.now in UTC

> Possible Duplicate: 
> <a href="https://stackoverflow.com/questions/755669/how-do-i-convert-datetime-now-to-utc-in-ruby" target="_blank" rel="noopener noreferrer">How do I Convert DateTime.now to UTC in Ruby?</a>

How do I get current time in Date-time-milliseconds &#x26; UTC?
Ex. 2012-03-22T18:48:40.873Z
I tried -
<pre><code class="hljs language-css">Time.now.utc_offset.to_s
Time.now.xs_datetime
</code></pre>

I am having trouble translating this into Ruby.

Here is a piece of JavaScript that does exactly what I want to do:

    function get_code(str){
        return str.replace(/^(Z_.*): .*/,&quot;$1&quot;)​​​​​​​​​​​​​​​​​​​​​​​​​​​;
    }

I have tried [gsub][1], [sub][2], and [replace][3] but none seem to do what I am expecting.


Here are examples of things I have tried:

    &quot;Z_sdsd: sdsd&quot;.gsub(/^(Z_.*): .*/) { |capture| capture }
    &quot;Z_sdsd: sdsd&quot;.gsub(/^(Z_.*): .*/, &quot;$1&quot;)
    &quot;Z_sdsd: sdsd&quot;.gsub(/^(Z_.*): .*/, &quot;#{$1}&quot;)
    &quot;Z_sdsd: sdsd&quot;.gsub(/^(Z_.*): .*/, &quot;\1&quot;)
    &quot;Z_sdsd: sdsd&quot;.gsub(/(.).*/) { |capture| capture }


  [1]: http://ruby-doc.org/core-1.9.3/String.html#method-i-gsub
  [2]: http://ruby-doc.org/core-1.9.3/String.html#method-i-sub
  [3]: http://ruby-doc.org/core-1.9.3/String.html#method-i-replace

Ruby replace string with captured regex pattern

The syntax for mapping:

    a = [&quot;a&quot;, &quot;b&quot;, &quot;c&quot;, &quot;d&quot;]      #=&gt; [&quot;a&quot;, &quot;b&quot;, &quot;c&quot;, &quot;d&quot;] 
    a.map {|item|&quot;a&quot; == item}     #=&gt; [true, false, false, false] 
    a.select {|item|&quot;a&quot; == item}  #=&gt; [&quot;a&quot;]

Question how about if I have:

     irb(main):105:0&gt; details[1]
     =&gt; {:sku=&gt;&quot;507772-B21&quot;, :desc=&gt;&quot;HP 1TB 3G SATA 7.2K RPM LFF (3 .&quot;, :qty=&gt;&quot;&quot;, 
     :qty2=&gt;&quot;1&quot;, :price=&gt;&quot;5,204.34 P&quot;}

I want to delete every entry which has an empty qty value on this array or select only the ones with some value in it. 

I tried: 

    details.map {|item|&quot;&quot; == item}

Just returns a lot of false and then when I use the same just change map to select I get:

    []

Ruby Arrays: select(), collect(), and map()

I want to test rendering a particular partial according to some conditions.

For example, in model show action view `show.html.erb` I have:

    &lt;% if condition1 %&gt;
     &lt;%=  render :partial =&gt; &quot;partial1&quot; %&gt;
    &lt;% else %&gt;
     &lt;%=  render :partial =&gt; &quot;partial1&quot; %&gt;
    &lt;% end %&gt;
I tried:

    response.should render_template(&quot;partial_name&quot;)

but it tells that it rendered &quot;show&quot; template

&gt; expecting &lt;&quot;partial1&quot;&gt; but rendering with &lt;&quot;model/show,
&gt; layouts/application&quot;&gt;

What I am doing wrong?

How to test rendering a partial with RSpec

I need to work with decimals.
In my program, the user need to put a number with decimals to convert that number.

The problem is: If I try to convert the argument into a number I get a integer without decimals.

    # ARGV[0] is: 44.33
    
    size = ARGV[0]
    
    puts size.to_i
    # size is: 44
    # :(

Convert string to decimal number in ruby

I&#39;ve been trying to install this &#39;rubygame&#39; gem for some time, but whenever I use the command

    gem install rubygame
it will give an error:

    ERROR:  Could not find a valid gem &#39;rubygame&#39; (&gt;= 0) in any repository
    ERROR:  While executing gem ... (Gem::RemoteFetcher::FetchError)
    Errno::ETIMEDOUT: Connection timed out - connect(2) (http://rubygems.org/latest_specs.4.8.gz)


I&#39;ve also tried other gems but with similar results:

    ERROR:  Could not find a valid gem &#39;rake&#39; (&gt;= 0) in any repository
    ERROR:  While executing gem ... (Gem::RemoteFetcher::FetchError)
    Errno::ETIMEDOUT: Connection timed out - connect(2) (http://rubygems.org/latest_specs.4.8.gz)

I&#39;ve already made sure I have an internet connection, and have already tried reinstalling both ruby and rubygems (currently using ruby 1.8, rubygems 1.7.2). Googling didn&#39;t help me at all. I would be very grateful if anyone can solve my problem. My sources list only shows http://rubygems.org

Content Type	Original Author	Original Content on Stackoverflow
Question	Majoris	View Question on Stackoverflow
Solution 1 - Ruby	hemanth.hm	View Answer on Stackoverflow

Ruby - time.now in UTC

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Define functions in structs

Vectors in Arduino

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