What could be the reason that when splicing an object from an array in JavaScript, the array itself is not returned?

I am working with an array of objects, such as a deck of cards:

var deck = [];
deck.push(new Card(suit, rank));

When I try to retrieve a card from the top or bottom of the deck, it works fine:

var card = deck.pop();
var card = deck.shift();

However, if I attempt to get a card from the middle of the deck (imagine this as a hand of cards), like so:

var card = deck.splice(2,1);

The object does not seem to be correctly assigned to the variable and everything turns out undefined. I have researched that splice should return the object being removed - so what could be the issue?

javascriptarrays

Answer №1

Attempt

let selectCard = deck.extract(2,1)[0];

As the extract function provides a set of elements that have been removed...

Answer №2

When using the splice method in JavaScript, you will receive an array of elements that were possibly removed. This means that even if you only remove one element, you will still get back an array containing that element. For example:

var item = list.splice(3, 1)[0];

Answer №4

Encountering the same issue as discussed here, in a similar environment: It seems that .splice() actually returns an array of removed elements, rather than a single element. Therefore, you will need to extract the first element from that array:

var card = deck.splice(2,1)[0];

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