Most of the book is more of a pre-made Go program broken up with some side notes on how it was written.

• Lexical analysis: stream of text in stream of tokens out
• Read Eval Print Loop
• Pratt parsing, but kind of explains it and sends links to other explanations.
• Entirely tosses memory management to Go's garbage collector, doesn't really go in to the topic.

Tony Hoare introduced null references to the ALGOL W language in 1965 and called this his“billion-dollar mistake”

Kinda like having something explosive inyour car leads you to driving slower and more carefully.

Pratt Parsing

• Has a table of precedence, prefix parsing, and infix parsing, attached to a token type.
• Prefix: the token appears before another; or rather, no symbol precedes it.
• Infix: the token appears between two symbols. Or rather, a symbol precedes it.
• Prefix parsers only receive deference if they have a lower precedence than the current precedence level.