This is a good, solid list of "don't dos" that will benefit a whole lotta peeps.

So if you have a line of code with six levels of indentation, you're looking at either six bytes (tabs) or twenty-four bytes (spaces…if they're set at four).

We shave single characters in src attributes by renaming 'this-is-the-best-photo.jpg' to 'titbp.jpg'.

While it seems like nitpicking, I just can't abide uninformed commentary.

[...] simple, download the ISO images and follow Section 2 of Blake's CentOS LAMP Server Guide to get it installed and configured. I also get VirtualBox Additions installed so I don't have [...]

Using count($array) inside a for() statement will actually only execute the count function once, thus rendering a pre-defined variable quite useless.

for() evaluates the three parameters in full before looping through the code between the braces, so it doesn't matter how you pass the data to the construct. You could use return variables from functions for all three parameters without impeding performance.

It WAS true with php 3 and early versions of php 4 but please stop to spread these myth!

The article is good but when you say things like "use feature X instead of Y because it is faster!" then please proof it!

Anyway I totaly agree with regex functions versus standard string functions. As long as you don't check the format of an input use standard string functions. And when you want to check the format of input consider the filter functions before you consider regexes!

I agree also to nuno costa. Don't overcomment the code only document the code that needs it (Like a algorithm) and document you classes/functions. But I think thats what you've meant.

<img src="" alt="">

My class looks like this:

public static class ImageHelper
{
public static string ImgUrl(string applicationPath, string filename)
{
if (applicationPath == "/")
{
return "/Images/" + filename;
}
else
{
return applicationPath + "/Images/" + filename;
}
}
}

Thanks for this great guide! It's been most helpful. I've got everything to work fine in my local test environment where my application runs in the root of the development webserver.

I'm having a problem however when uploading my application to my production server, where the application resides within a subdir of the root. How am I supposed to acces my images in this way?

Kind regards,
Erwin

@Morten Christiansen – thanks for pointing this out! If I had gone just a bit farther with my explorations, I would have found this much better solution.

Relying on "internal" javascript variables (classically differentiated by beginning with underscores) is of course never recommended – but using this method will perhaps survive an upgrade, whereas my original method would always require you to re-implement it when you got a new version of the script.

I'll update the post with this.

var f = $("#formId");
var context1 = f[0]['__MVC_FormValidation'];
var errors;
if (context1) {
errors = context1.validate("submit"); // Validate the form
}
if (!context1 || errors.length == 0) {
$.ajax(
{
type: "POST",
url: f.attr("action"),
data: f.serialize(),
dataType: "json",
success: function (result) {
var domElement = $(result.Html);
$("#elementToUpdateId").replaceWith(domElement);
}
});
}

This worked nicely for me. Thanks for your help.