You might think, Boy, is there a context expensive grammar out there? What's the opposite of free?

These grammars that we've been introducing describe something new context free languages.

It relates grammars to parsing, which is one of the concepts in this class.

It depends on the context.

This branch of the family is all about representation.

I am just gonna pause for a moment to let you think about that.

Finite State Machines, adding a lexer that follows them automatically,

So in lecture, we spent a lot of time learning about context free grammars and languages.

like HTML or SQL, the language of database queries.

But that's an example of an application that also uses this sort of linguistic analysis perhaps a little less related to context free grammars but still in the same vein.

Well, because, sentences are more interesting.

The set of languages that can be described by re write rules or grammers like this are called context free languages.

Here I've written down four claims.

Y has the value of 2.

But if right above it I've written X 0, then we'd get a different answer.

It handles LL. It handles LR. It handles LALR.

That line above it is the context.

This is called being lazy, and it's a phenomenal virtue when you're writing programs.

Actually, they're both just concise notations for specifying possibly infinite sets of strings.

... the misspelled word shown in context...

All right. So, it's another one of these puzzle like questions.

They're the actual input that we're trying to match.

Sometimes this statement is true, and sometimes it's not.

A context free grammar can capture the language a N and b N, where N is the same.

That's much more important than knowing the particular syntax for any language.

These are just the ESPN SportsCenter version of the game.

These days I think your time, the human's time, is more important than the computers.

That's a good point, Peter, and the answer is yes.

memory

RAM memory

Memory

In most interpreters, this is a problem.

That's an excellent question.

In theory, you could compose it over here as well.

We'll talk about it in a lot of different contexts.

Perhaps a stealth thing.

Another common story or storyline is the claim that we have to get tough .

Here's a new quiz. The Great Grammar Fix Up.

In particular, it's a set of strings that can be represented by a finite state machine or a regular expression.

So let's talk about the memory.

The brain is recording all information and driving all change in temporal context.

Build the system so that anybody can contribute at any amount.

Otherwise it would be chaos.

These are both infinite, infinite grammars.

Memory