    package.path = package.path .. &quot;;../?.lua&quot;

will work for both.

This must be something utterly stupid that I&#39;ve done or am doing, but I have an input with a value attribute that simply isn&#39;t being displayed:

    &lt;div class=&quot;input text required&quot;&gt;
      &lt;label for=&quot;Product0Make&quot;&gt;Make&lt;/label&gt;
      &lt;input name=&quot;data[Product][0][make]&quot; 
             type=&quot;text&quot; 
             maxlength=&quot;255&quot; 
             value=&quot;AC Make&quot; 
             id=&quot;Product0Make&quot;&gt;
    &lt;/div&gt;

Has anyone ever seen this before? Do I have some kind of typo that I&#39;m just blind to? For whatever it may be worth, here&#39;s the CakePHP code that&#39;s generating this line:

    &lt;?php echo $this-&gt;Form-&gt;input( &#39;Product.&#39; . $index . &#39;.make&#39;, array( &#39;default&#39; =&gt; $product[&#39;Product&#39;][&#39;make&#39;] ) ) ?&gt;

I have a small form with a handful of text inputs, 1 textarea and 2 selects. None of the text input values display, but everything else is fine.

Any thoughts would be appreciated. I can&#39;t even believe I&#39;m having to ask this question, but that&#39;s how crazy it&#39;s making me.

Input value doesn&#39;t display. How is that possible?

Here I go with my basic questions again, but please bear with me.

In Matlab, is fairly simple to add a number to elements in a list:

    a = [1,1,1,1,1]
    b = a + 1

`b` then is `[2,2,2,2,2]`

In python this doesn&#39;t seem to work, at least on a list.

Is there a simple fast way to add up a single number to the entire list.

Thanks

Sum one number to every element in a list (or array) in Python

My directory structure looks like this:

    |-- ball.lua
    |-- entity.lua
    |-- test
        `-- ball_test.lua

I&#39;m using the following code in test/ball_test.lua to require ball.lua from the parent directory:

    package.path = package.path .. &quot;;../entity.lua&quot;
    require(&quot;entity&quot;)
    package.path = package.path .. &quot;;../ball.lua&quot;
    require(&quot;ball&quot;)

entity.lua is a dependency of ball.lua. So I require(&quot;entity&quot;) first otherwise I get a module &#39;entity.lua&#39; not found error. This seems like a hack, what&#39;s a better way to do this?


Is there a better way to require file from relative path in lua

My directory structure looks like this:
<pre><code class="hljs language-lua">|-- ball.lua
|-- entity.lua
|-- test
 `-- ball_test.lua
</code></pre>
I'm using the following code in test/ball_test.lua to require ball.lua from the parent directory:
<pre><code class="hljs language-lua">package.path = package.path .. ";../entity.lua"
require("entity")
package.path = package.path .. ";../ball.lua"
require("ball")
</code></pre>
entity.lua is a dependency of ball.lua. So I require("entity") first otherwise I get a module 'entity.lua' not found error. This seems like a hack, what's a better way to do this?

In the Lua wiki I found a way to define default values for missing arguments:

	function myfunction(a,b,c)
		b = b or 7
		c = c or 5
		print (a,b,c)
	end

Is that the only way? The PHP style `myfunction (a,b=7,c=5)` does not seem to work. Not that the Lua way doesn&#39;t work, I am just wondering if this is the only way to do it.

Define default values for function arguments

I&#39;m confused what purpose **[Mongrel2][1]** serves/provides that **[nginx][2]** doesn&#39;t already do.

*(Yes, I&#39;ve read the [manual][3] but I must to be too much of a noob to understand how it&#39;s fundamentally different than nginx)*

My current web application stack is: &lt;br&gt;
- **nginx**: webserver &lt;br&gt;
- **Lua**: programming language &lt;br&gt;
- **FastCGI + LuaJIT**: to connect nginx to Lua &lt;br&gt;
- **Postgres**: database


  [1]: http://mongrel2.org
  [2]: http://nginx.org
  [3]: http://mongrel2.org/static/mongrel2-manual.html

Why use Mongrel2?

Given an array of x,y points, how do I sort the points of this array in clockwise order (around their overall average center point)? My goal is to pass the points to a line-creation function to end up with something looking rather &quot;solid&quot;, as convex as possible with no lines intersecting.

For what it&#39;s worth, I&#39;m using Lua, but any pseudocode would be appreciated.

**Update:** For reference, this is the Lua code based on Ciamej&#39;s excellent answer (ignore my &quot;app&quot; prefix):

    function appSortPointsClockwise(points)
        local centerPoint = appGetCenterPointOfPoints(points)
        app.pointsCenterPoint = centerPoint
        table.sort(points, appGetIsLess)
        return points
    end
    
    function appGetIsLess(a, b)
        local center = app.pointsCenterPoint
    
        if a.x &gt;= 0 and b.x &lt; 0 then return true
        elseif a.x == 0 and b.x == 0 then return a.y &gt; b.y
        end
    
        local det = (a.x - center.x) * (b.y - center.y) - (b.x - center.x) * (a.y - center.y)
        if det &lt; 0 then return true
        elseif det &gt; 0 then return false
        end
    
        local d1 = (a.x - center.x) * (a.x - center.x) + (a.y - center.y) * (a.y - center.y)
        local d2 = (b.x - center.x) * (b.x - center.x) + (b.y - center.y) * (b.y - center.y)
        return d1 &gt; d2
    end
    
    function appGetCenterPointOfPoints(points)
        local pointsSum = {x = 0, y = 0}
        for i = 1, #points do pointsSum.x = pointsSum.x + points[i].x; pointsSum.y = pointsSum.y + points[i].y end
        return {x = pointsSum.x / #points, y = pointsSum.y / #points}
    end

&lt;/code&gt;

Sort points in clockwise order?

My assignment is how to do a for loop. I have figured it out in terms of numbers but cannot figure it out in terms of names. I would like to create a for loop that runs down a list of names. Following is what I have so far: 

    names = {&#39;John&#39;, &#39;Joe&#39;, &#39;Steve&#39;}
    for names = 1, 3 do
      print (names)
    end

I have tried some other things but it just doesn&#39;t work, the terminal always just lists 1, 2, 3... What I am doing wrong?

For Loop on Lua

I&#39;m having trouble displaying the contents of a table which contains nested tables (n-deep). I&#39;d like to just dump it to std out or the console via a `print` statement or something quick and dirty but I can&#39;t figure out how. I&#39;m looking for the rough equivalent that I&#39;d get when printing an `NSDictionary` using gdb. 

Content Type	Original Author	Original Content on Stackoverflow
Question	Seth Reno	View Question on Stackoverflow
Solution 1 - Lua	Doug Currie	View Answer on Stackoverflow

Is there a better way to require file from relative path in lua

Lua Problem Overview

Lua Solutions

Solution 1 - Lua

Sum one number to every element in a list (or array) in Python

Input value doesn't display. How is that possible?

Attributions