Tokens

The t_ tells us and it tells the Python system that we're declaring a token.

Changing authentication token

And now we get more of the output that we were expecting.

These come out of nowhere or come from library integration.

Ab dot cd, and if the tokens are c, if the next token is c, then we're totally going to shift.

Getting the token

Remove Tokens

It's 4 copies of 0 9 together.

And we're only in this brave new world after we've seen the (c).

Enter token pin

And we did Lexing or Lexical Analysis to break it up into a list of tokens.

I'm going to make 1 substitution. That's what I'm doing here.

Skip me for now.

I go look at what the user actually entered.

I'm also going to use a little shortcut.

We're just going to change the name of the function and we're going to change the symbol to which it matches.

Getting the Token from the server

Token missing

openvpn is missing

openssl is missing

Here I've written 6 HTML tokens, given them names on the left and examples on the right.

Now let's say we've seen one part of the input.

Well, this has a dot before a nonterminal, so we can't do anything here.

Give me five tokens, please.

So here's just a quick video of what this looks like.

So, conceptually, one of the first things we'll do is shift.

We're going to figure out if there is a candidate next state by calling a special procedure shift.

Your token is invalid. Would you like to get a new token to proceed?

We need to know which one it is, and formally we refer to that as the value of the token.

Something a little different would happen.

I have the identifier, which is exactly the regular expression we came up with.

So I've set the value correctly.

I have seen enough to make the judgement S goes to E based on this input string.

So here I have the solution.

Let's test out our knowledge with a quiz.

So this is a study we did with Vicki Horner.

So we just learned how to do that JavaScript token in lexical analysis.

Here I have the code I just wrote.

Need token to be insert. Please insert token in SLOT....

Let's say I'm trying to parse a string made out of a big list of tokens token 1, token 2, token N, all the way up to token last.

A lexical analyzer or lexer this is a term of art is just a collection of such tokens.

Alright, how about this?

We've seen the first token, (a).

Hands it over, and then gets some food.