Plucking an Array. Why is a random letter removed rather than the requested letter?

Authoring Twine
1

Please specify version and format if asking for help, or apply optional tags above:
Twine Version: 2
Story Format: Sugarcube 2.34.1

==code==
<<set $alphabet to []>>
<<set $alphabet.push(“a”, “b”, “c”, “d”, “e”, “f”, “g”, “h”, “i”, “j”, “k”, “l”, “m”, “n”, “o”, “p”, “q”, “r”, “s”, “t”, “u”, “v”, “w”, “x”, “y”, “z”)>>

Alphabet length is $alphabet.length
This is the alphabet: $alphabet

`<<set $letter to prompt(“Which letter do you wish to remove?”)>>

<<if $alphabet.contains($letter)>>
Alright, we’ll remove $letter.
<<set $index to $alphabet.indexOf($letter)>>
<<if $index > 0>>
Alphabet length before plucking: $alphabet.length
Alphabet before plucking: $alphabet
<<set $alphabet.pluck($index, $index + 1)>>
Alphabet after plucking: $alphabet
Alphabet length after plucking: $alphabet.length
<</if>>
<<else>>
Sorry, that letter, $letter, has already been removed.
<</if>>

==endcode==

Question 1: If I request that code to remove the letter “c”, it removes a letter, but not “c”, and not the same letter twice running? Why is that?

Question 2: What do the two numbers in the pluck method do?
<<set $alphabet.pluck($index, $index + 1)>>
I set them to 3,5 thinking I would remove d, e, f, g, and h, or maybe just d and e, or d, e, and f, but only one letter is removed.

Question 3: Is it possible to indent code in this forum?

2

Both your questions are answered in the documentation:

https://www.motoslave.net/sugarcube/2/docs/#methods-array-prototype-method-pluck

It seems you’ve misunderstood what pluck does; it returns a random element.

To remove an element you can use remove instead:

https://www.motoslave.net/sugarcube/2/docs/#methods-array-prototype-method-delete

You don’t need to use the index like you do there, but if you want/need to you can use deleteAt instead.

https://www.motoslave.net/sugarcube/2/docs/#methods-array-prototype-method-deleteat

1 Like
3

Thanks, Tobias.

The documentation is still nearly opaque to me, so I was working from a Vegetarian Zombie Youtube tutorial in which he uses the pluck method to remove specific items from an array.

But it didn’t work for me, and you’ve explained why. Thanks.

4

The code you’re using would have worked in SugarCube v1, but the version of the .pluck() method in SugarCube v2 doesn’t take any arguments.

1 Like
5

Thanks. I was working from a Youtube video that must have been using version 1.