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Ultimate list of CF debugging output template alternatives

Note: This blog post is from 2010. Some content may be outdated--though not necessarily. Same with links and subsequent comments from myself or others. Corrections are welcome, in the comments. And I may revise the content as necessary.
Following on the heels of my "Ultimate Var Scope Resource list" last week, here now I present what I think is the ultimate list of CF debugging output template alternatives.

Yes, you CAN modify the debugging output. Some have even done it for you

Many may not realize that the CF debugging output (optionally displayed at the bottom of the page, as enabled in the CF Admin) is actually created by a CFML template that can be modified ([cf]\wwwroot\WEB-INF\debug\classic.cfm).

Fortunately, several people have offered various resources that explain how to work with this file and offer packaged alternatives with specific features to resolve particular problems (where people wish the debugging output did more, or could be seen differently than at the bottom of the page).

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The Ultimate Var Scope Resource list? Understanding/resolving problems with the var scope in CFML

Note: This blog post is from 2010. Some content may be outdated--though not necessarily. Same with links and subsequent comments from myself or others. Corrections are welcome, in the comments. And I may revise the content as necessary.
Do you know what the "var scope problem" is, and how pernicious it can be in causing very subtle bugs that can cause errors that are VERY hard to understand? I list here several resources to help you understand the issue. Some help plainly explain what the issue is, including even a live demo.

I also discuss below the key varscoper tool which you will want to use to help assess and indeed correct your own code.

(Update in 2022, 2019: while the many resources are indeed all quite old now, they all still apply, and most still exist. Where needed, I recovered them from the good ol' archive.org, an awesome resource for finding old content, as I've written about before.)

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