At Fri, 8 Oct 2010 23:11:21 -0400, Eli Barzilay wrote: > > This proposal originates with the need to fix a problem in the HtDP > > teaching languages. The HtDP teaching languages currently use `true' > > and `false' for true and false, and the HtDP languages are configured > > to print booleans as `true' and `false'. That doesn't work with quoted > > lists. For example, > > > > '(true false) > > > > is a list of symbols, not a list of booleans. > > BTW, wasn't the whole sophisticated quoted printout part of a solution > to this, so that those true/false would not print out as quoted?
It's an expression issue, not a printing issue. We tell students that `true' and `false' are literals, and we later tell them that `quote' can be used to form lists of literals, and so they try to write the above. _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
