Is there an equivalent object in Javascript similar to Pair object from Java?

user_5332102 0
Viewed 309

There is an object in Java that comes from javafx.util library. You can use it to return 2 value as method return value. I wonder if there is an equivalent Object in Javascript. I can use regular Map() object for my purpose but I would like to know if there is something special for this purpose in Javascript too as it exists in Java.

javascript java
2 Answers

The mentioned Pair object exists of a key and a value field. As Javascript is a dynamic language I would suggest to simply use an object like

function () {
    const pair = {
        key: 'someKey',
        value: 'some value'
    };
    return pair;
}

or even

function () {
    const pair = {
        'someKey': 'someValue'
    };
    return pair;
}

But to my knowlege there is no dedicated pair object in the Javascript language.

user_51187620

There is an object in Java that comes from javafx.util library.

In fact, standard Java (JDK) does not have a Pair class. The class javafx.util.Pair is a JavaFx class, not a JDK class. Since JDK 11, JavaFx is a separate project maintained by OpenJFX community. The closest thing to a 'pair' notion JDK has is Map.Entry. 

Map.Entry <String, Integer> pair = 
    new AbstractMap.SimpleEntry <>();

In JavaScript, defining a 'pair' is much simpler. 

var pair = {key1: "value1"};
console.log(pair.key1);

user_57495700
Related