Channel 1

Television that can be referred to by channel

Example 313

★★

Understanding channels (a number) in the names of televisions.

We might want to allow every television to be tuned to a channel (a number property) which the player could refer to, so that

WATCH CHANNEL 13
TURN OFF CHANNEL 4

would be directed to the appropriate television object, if any television is turned on and tuned to the correct station. We might now write:

Play/modify in Borogove

Play in Quixe

"Channel"

A television is a kind of device. A television has a number called the channel. Understand the channel property as referring to a television. Understand "channel" as a television.

The Office is a room. The widescreen TV is a television in the Office. The fifties TV is a television in the Office.

Changing the channel of it to is an action applying to one thing and one number.

Understand "tune [something] to [number]" or "change channel of [something] to [number]" as changing the channel of it to.

Check changing the channel of something to:

if the noun is not a television, say "[The noun] cannot be tuned to a channel." instead.

Carry out changing the channel of something to:

now the channel of the noun is the number understood.

Report changing the channel of something to:

say "You tune [the noun] to channel [number understood]."

Instead of examining a television:

if the noun is switched off, say "[The noun] is currently turned off." instead;

let the chosen channel be the channel of the noun;

if the chosen channel is a current channel listed in the Table of Television Channels:

choose row with current channel of the chosen channel in the Table of Television Channels;

say "[output entry][paragraph break]";

otherwise:

say "Snow fills the screen of [the noun]."

Table of Television Channels

current channel	output
0	"The screen of [the noun] is completely black."
4	"A gloomy female news anchor describes the latest car bomb in Baghdad: 104 dead today, and no sign of change."
5	"A couple of contestants in spangled scarlet outfits are performing an energetic paso doble."
13	"On-screen, Ichiro is up to bat with one man on second and no outs."

Test me with "change channel of fifties tv to 4 / x channel 4 / switch on fifties / x channel 4 / switch on widescreen / tune fifties tv to 5 / x channel 5 / x fifties tv / x channel 4".

Office
You can see a widescreen TV and a fifties TV here.

>(Testing.)

>[1] change channel of fifties tv to 4
You tune the fifties TV to channel 4.

>[2] x channel 4
The fifties TV is currently turned off.

>[3] switch on fifties
You switch the fifties TV on.

>[4] x channel 4
A gloomy female news anchor describes the latest car bomb in Baghdad: 104 dead today, and no sign of change.

>[5] switch on widescreen
You switch the widescreen TV on.

>[6] tune fifties tv to 5
You tune the fifties TV to channel 5.

>[7] x channel 5
A couple of contestants in spangled scarlet outfits are performing an energetic paso doble.

>[8] x fifties tv
A couple of contestants in spangled scarlet outfits are performing an energetic paso doble.

>[9] x channel 4
You can't see any such thing.