Remove options from an Either macro if they are true.

poolef

So, I have set a variable called $randomPassage to one of six passages (listed below). Each passage below is associated with a quest line. I have another boolean variable for each quest (e.g. $squirrelComplete) to designate whether or not a quest line has been completed. Once the quest line is completed I would like to remove the passage from the either macro... but I'm at a loss for ideas... any ideas would be mucha appreciated!

(set: $randomPassage to (either:"squirrel","BoynRock","SnowLeopard","MountPerson","MountGoat","Pinetree"))

spaceranger123

I'll hazard a guess for one way..
You'd make a function that returns string values if your boolean quest line completed variables are true. then assign either() to that function.

Either:function(q1,q2,q3,etc)

I don't know the syntax to do this however.

greyelf

You don't state which Story Format (name and version) you are using, based on the syntax of your example I will assume you are using Harlowe.

note: My example assumes that you are setting up boolean variables like the following somewhere in your story.

(set: $squirrelComplete to false)
(set: $SnowLeopardComplete to false)

You can use an array and (if:) macros to build the list of options that the (either) macro will choose from.

(set: $options to (array:))

(if: not $squirrelComplete)[
	(set: $options to it + (array: "squirrel"))
]
(if: not $SnowLeopardComplete)[
	(set: $options to it + (array: "SnowLeopard"))
]

... you can then use special ... operateor documented in the Array Data of the manual to use the $options array with the (either:) macro.

(set: $randomPassage to (either: ...$options))

thebigh

I would go about this the reverse way. First initialise a list that will contain all the available quests, initially empty:

(set: $availableQuests to (a:)) 

Then, go through all your booleans in turn and add the corresponding quest to the list:

(if: $squirrelComplete is false)[(set: $availableQuests to it+(a:"squirrel"))]

Any quest that you've done already will not get added to the list. When you're done, just select randomly:

(set: $randomPassage to (either:...$availableQuests))

poolef

Thanks for everyone's input, and yes I was using the latest version of Harlowe. I actually ended up doing something similar to @thebigh ... but in reverse and did the following:


(set: $randomMountPassage to (a: "squirrel","BoynRock","SnowLeopard","MountPerson","MountGoat","Pinetree"))
(if: $squirrelQuest is true )[(set: $randomMountPassage to it - (a: "squirrel"))]
(if: $snowLeopardQuest is true )[(set: $randomMountPassage to it - (a: "SnowLeopard"))]
(if: $parkRangerQuest is true )[(set: $randomMountPassage to it - (a: "MountPerson"))]
(if: $mountainGoatQuest is true )[(set: $randomMountPassage to it - (a: "MountGoat"))]
(if: $pineTreeQuest is true)[(set: $randomMountPassage to it - (a: "Pinetree"))]
(if: $boyRockQuest is true )[(set: $randomMountPassage to it - (a: "BoynRock"))]