I have about 7 Javascript files now (thanks to various jQuery plugins) and 4-5 CSS files.  I&#39;m curious as to what&#39;s the best practice for dealing with these including where in the document they should be loaded?  YSlow tells me that Javascript files should be--where possible--included at the end.  The end of the body?  It mentions that the delimeter seems to be whether they write content. All my Javascript files are functions and jQuery code (all done when ready()) so that should be OK.

So should I include one CSS and one Javascript file and have those include the rest?  Should I concatenate all my files into one?  Should I put Javascript my &lt;script src=&quot;&quot;&gt; tags at the very end of my document?

**Edit:** FWIW yes this is PHP.

Multiple javascript/css files: best practices?

I’ve never worked on software where I needed to use design patterns. According to Paul Graham’s [Revenge of the Nerds][1] essay, design patterns are a sign of not enough abstraction. 

To quote him directly, “For example, in the OO world you hear a good deal about &quot;patterns&quot;. I wonder if these patterns are not sometimes evidence of case (c), the human compiler, at work. When I see patterns in my programs, I consider it a sign of trouble. The shape of a program should reflect only the problem it needs to solve. Any other regularity in the code is a sign, to me at least, that I&#39;m using abstractions that
aren&#39;t powerful enough-- often that I&#39;m generating by hand the expansions of some macro that I need to write.” 

I was just wondering if everyone thought design patterns are overused and are symptoms of not having enough abstraction in your code.


  [1]: http://www.paulgraham.com/icad.html

When are design patterns the problem instead of the solution?

Are there any performance benefits to using single quotes instead of double quotes in php?

In other words, would there be a performance benefit of:

    $foo = &#39;Test&#39;;

versus

    $foo = &quot;Test&quot;;

Is there a performance benefit single quote vs double quote in php?

Are there any performance benefits to using single quotes instead of double quotes in php?
In other words, would there be a performance benefit of:
<pre><code class="hljs language-ini">$foo = 'Test';
</code></pre>
versus
<pre><code class="hljs language-ini">$foo = "Test";
</code></pre>

I have to generate a xml file dynamically at runtime. Please help me in generating the below XML file dynamically using PHP.



    &lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
    &lt;xml&gt;
     &lt;track&gt;
         &lt;path&gt;song1.mp3&lt;/path&gt;
         &lt;title&gt;Track 1 - Track Title&lt;/title&gt;
     &lt;/track&gt;
     &lt;track&gt;
         &lt;path&gt;song2.mp3&lt;/path&gt;
         &lt;title&gt;Track 2 - Track Title&lt;/title&gt;
     &lt;/track&gt;
     &lt;track&gt;
         &lt;path&gt;song3.mp3&lt;/path&gt;
         &lt;title&gt;Track 3 - Track Title&lt;/title&gt;
     &lt;/track&gt;
     &lt;track&gt;
         &lt;path&gt;song4.mp3&lt;/path&gt;
         &lt;title&gt;Track 4 - Track Title&lt;/title&gt;
     &lt;/track&gt;
     &lt;track&gt;
         &lt;path&gt;song5.mp3&lt;/path&gt;
         &lt;title&gt;Track 5 - Track Title&lt;/title&gt;
     &lt;/track&gt;
     &lt;track&gt;
         &lt;path&gt;song6.mp3&lt;/path&gt;
         &lt;title&gt;Track 6 - Track Title&lt;/title&gt;
     &lt;/track&gt;
     &lt;track&gt;
         &lt;path&gt;song7.mp3&lt;/path&gt;
         &lt;title&gt;Track 7 - Track Title&lt;/title&gt;
     &lt;/track&gt;
     &lt;track&gt;
         &lt;path&gt;song8.mp3&lt;/path&gt;
         &lt;title&gt;Track 8 - Track Title&lt;/title&gt;
     &lt;/track&gt;
    
   &lt;/xml&gt;


How to generate XML file dynamically using PHP?

What’s the best way to remove comments from a PHP file?

I want to do something similar to strip-whitespace() - but it shouldn&#39;t remove the line breaks as well.

For example,

I want this:

    &lt;?PHP
    // something
    if ($whatsit) {
        do_something(); # we do something here
        echo &#39;&lt;html&gt;Some embedded HTML&lt;/html&gt;&#39;;
    }
    /* another long
    comment
    */
    some_more_code();
    ?&gt;

to become:

    &lt;?PHP
    if ($whatsit) {
        do_something();
        echo &#39;&lt;html&gt;Some embedded HTML&lt;/html&gt;&#39;;
    }
    some_more_code();
    ?&gt;

(Although if the empty lines remain where comments are removed, that wouldn&#39;t be OK.)

It may not be possible, because of the requirement to preserve embedded HTML - that’s what’s tripped up the things that have come up on Google.



Best way to automatically remove comments from PHP code

I have two classes: `Action` and `MyAction`. The latter is declared as:

    class MyAction extends Action {/* some methods here */}

All I need is method in the `Action` class (only in it, because there will be a lot of inherited classes, and I don’t want to implement this method in all of them), which will return classname from a static call. Here is what I’m talking about:

    Class Action {
     function n(){/* something */}
    }

And when I call it:

    MyAction::n(); // it should return &quot;MyAction&quot;

But each declaration in the parent class has access only to the parent class `__CLASS__` variable, which has the value “Action”.

Is there any possible way to do this?

How can I get the classname from a static call in an extended PHP class?

I need to keep a session alive for 30 minutes and then destroy it. 

How do I expire a PHP session after 30 minutes?

I need to perform a query 2.5 million times. This query generates some rows which I need to `AVG(column)` and then use this `AVG` to filter the table from all values below average. I then need to `INSERT` these filtered results into a table. 

The only way to do such a thing with reasonable efficiency, seems to be by creating a `TEMPORARY TABLE` for each query-postmaster python-thread. I am just hoping these `TEMPORARY TABLE`s will not be persisted to hard drive (at all) and will remain in memory (RAM), unless they are out of working memory, of course.

I would like to know if a TEMPORARY TABLE will incur disk writes (which would interfere with the INSERTS, i.e. slow to whole process down)

PostgreSQL temporary tables

If I use &quot;top&quot; I can see what CPU is busy and what process is using all of my CPU.

If I use &quot;iostat -x&quot; I can see what drive is busy.

But how do I see what process is using all of the drive&#39;s throughput?


What Process is using all of my disk IO

The [MSDN site](http://msdn.microsoft.com/en-us/library/system.io.bufferedstream.aspx) states:

&gt; A buffer is a block of bytes in memory
&gt; used to cache data, thereby reducing
&gt; the number of calls to the operating
&gt; system. Buffers improve read and write
&gt; performance. A buffer can be used for
&gt; either reading or writing, but never
&gt; both simultaneously. The Read and
&gt; Write methods of BufferedStream
&gt; automatically maintain the buffer.

Should I use this class in every possible occasion?

When to use .NET BufferedStream class?

I have a string buffer of about 2000 characters and need to check the buffer if it contains a specific string.&lt;br/&gt;
Will do the check in a ASP.NET 2.0 webapp for every webrequest.&lt;br/&gt;

Does anyone know if the [String.Contains method][1] performs better than [String.IndexOf method][2]?&lt;br/&gt;

        // 2000 characters in s1, search token in s2
        string s1 = &quot;Many characters. The quick brown fox jumps over the lazy dog&quot;; 
        string s2 = &quot;fox&quot;;
        bool b;
        b = s1.Contains(s2);
        int i;
        i = s1.IndexOf(s2);

[Fun fact][3] 


  [1]: http://msdn.microsoft.com/en-us/library/dy85x1sa(VS.80).aspx
  [2]: http://msdn.microsoft.com/en-us/library/system.string.indexof(VS.80).aspx
  [3]: http://www.cl.cam.ac.uk/~mgk25/ucs/examples/quickbrown.txt

Is String.Contains() faster than String.IndexOf()?

For the following block of code:

    For I = 0 To listOfStrings.Count - 1
        If myString.Contains(lstOfStrings.Item(I)) Then
            Return True
        End If
    Next
    Return False

The output is:

**Case 1:**

&lt;!-- language: lang-none --&gt;

    myString: C:\Files\myfile.doc
    listOfString: C:\Files\, C:\Files2\
    Result: True

**Case 2:**

&lt;!-- language: lang-none --&gt;

    myString: C:\Files3\myfile.doc
    listOfString: C:\Files\, C:\Files2\
    Result: False

The list (listOfStrings) may contain several items (minimum 20) and it has to be checked against a thousands of strings (like myString).

Is there a better (more efficient) way to write this code?


Is there a performance benefit single quote vs double quote in php?

Php Problem Overview

Php Solutions

When are design patterns the problem instead of the solution?

Multiple javascript/css files: best practices?

Attributions