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The "Open questions with Karl" Lesson is part of the full, Introduction to JavaScript and jQuery course featured in this preview video. Here's what you'd learn in this lesson:

Karl says that the next workshop is “all jQuery all the time” Audience asks about putting all code in external script files and sharing variables from server side languages. Karl demos PHP json_encode to export variables to JavaScript Karl goes more in-depth into variable scoping, namespacing and using IFFEs Audience asks, “Where is jQuery going?” In terms of popularity over 50% of the top 10,000 websites use it (more than Flash). Karl breaks down version number usage and how jQuery team’s release cycle is getting faster and why old versions exist Audience asks if you break things when upgrading jQuery. Karl says there aren’t many breaking changes but with 3rd party plugins it can get tricky. He also explains how jQuery takes backwards compatibility very seriously

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