The early sad parts of "SICP in JavaScript" are especially section 2.2.1 Representing Sequences and chapter 2.3 Symbolic Data: "All the compound data objects w

The early sad parts of "SICP in JavaScript" are especially section 2.2.1 Representing Sequences and chapter 2.3 Symbolic Data: "All the compound data objects we have used so far were constructed ultimately from numbers. In this section we extend the representational capability of our language by introducing the ability to work with strings of characters as data." In SICP there were Lisp's symbolic expressions (s-expressions). They were removed without even mentioning them...