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Never done anything substantial in Scheme, but was probably my favorite language to learn in college, in the context of a function programming course.
I did not know there as a GNU interpreter. Will have to check it out.
Speaking of functional languages, someone told me that the XKCD website is programmed entirely in Haskell. True?
Think it is likely to remain too pricey for now. Too many price-insensitive business travelers willing to pay *any* price with the corporate credit card. Maybe the airlines can make it up on volume at a lower price point or figure out how to tier it properly, but seems like a good deal they have going now.
I think students tend to take far less away from having slides done out ahead of time. Seeing each step prevents students from simply reading ahead, getting a cursory understanding and then fading out. Seeing a teacher work out each step on the blackboard has always seemed far more engaging and instructive to me.