Why are some code samples occasionally not colored?

Question

Occasionally when I post a question on StackExchange and I copy and paste a code sample, when I publish the post, the code sample does not appear to color parts of the code like syntax highlighting. I have even had other members edit my post to add the coloring, but I don't know how to do this.

Is there a reason why pasted code would not be colored? I am using the 4 spaces preceding the code block and the code sample does appear with a grey background.

Answer 1

Syntax highlighting is automatically applied when certain tags appear under the question. For instance, a python tag will apply Python-centric highlighting to all code blocks.

The highlighting can be modified or applied block by block by preceding it immediately with a comment (not indented) of the form

<!-- language: lang-blahblah -->

where "blahblah" is the name of the language. From what I can tell, it is case sensitive and should always be lower case. This comment will not be visible in the rendered post.

For details and a (somewhat incomplete) list of supported languages, please visit the Meta SO thread at Syntax highlighting language hints.

Answer 2

StackExchange sites use Google-Code-Prettify for syntax highlighting of code snippets in a web page. so you can check out readme(FAQ) page for lots of information.

• For which languages does it work?
• How do I specify the language of my code?
• It doesn't work on ?
• Which browsers does it work with?
• How do I put line numbers in my code?
• How do I prevent a portion of markup from being marked as code?

i hope it helps you...

Answer 3

This is a test of the language tag. (I can't get it to work)

public static IPolyline MakePolyline(IPoint p1, IPoint p2)
{
    var polyline = new PolylineClass() as IPolyline;
    ((IZAware)polyline).ZAware = true;
    ((IMAware)polyline).MAware = true;
    polyline.SpatialReference = p1.SpatialReference;
    ((IPointCollection)polyline).AddPoint(p1);
    ((IPointCollection)polyline).AddPoint(p2);
    return polyline;
}