How to use the isWeakSet function from lodash

Find comprehensive JavaScript lodash.isWeakSet code examples handpicked from public code repositorys.

lodash.isWeakSet is a function provided by Lodash that checks whether a given value is a WeakSet object.

lodash-contrib.commonjs.js

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module.exports.isSymbol            = _.isSymbol;
module.exports.isTypedArray        = _.isTypedArray;
module.exports.isUndefined         = _.isUndefined;
module.exports.isValidDate         = _.isValidDate;
module.exports.isWeakMap           = _.isWeakMap;
module.exports.isWeakSet           = _.isWeakSet;
module.exports.isZero              = _.isZero;
module.exports.iterateUntil        = _.iterateUntil;
module.exports.iteratee            = _.iteratee;
module.exports.iterators           = _.iterators;

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+ 92 other calls in file

lodash.js

GitHub: mdmarufsarker/lodash

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console.log(isUndefined); // => true


const isWeakMap = _.isWeakMap(new WeakMap);
console.log(isWeakMap); // => true


const isWeakSet = _.isWeakSet(new WeakSet);
console.log(isWeakSet); // => true


const lt = _.lt(1, 3);
console.log(lt); // => true

+ 15 other calls in file

How does lodash.isWeakSet work?

lodash.isWeakSet works by examining a given value and determining whether it is a WeakSet object.

A WeakSet is a built-in object in JavaScript that represents a collection of unique objects where the objects are weakly held, meaning they can be garbage collected even if they are still referenced by the WeakSet.

To check whether a given value is a WeakSet object, lodash.isWeakSet performs several checks. First, it checks whether the value is an object, since only objects can be WeakSets. It then checks whether the object has a constructor property that equals the WeakSet constructor function. Finally, it checks whether the object has a add method and a delete method, which are methods that are required for any WeakSet object.

If the value passes all of these checks, then lodash.isWeakSet returns true. Otherwise, it returns false.

By using lodash.isWeakSet, developers can programmatically determine whether a given value is a WeakSet object, allowing them to perform operations on WeakSets with confidence.

Ai Example

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const _ = require("lodash");

const weakSet = new WeakSet();
const object = {};

console.log(_.isWeakSet(weakSet)); // true
console.log(_.isWeakSet(object)); // false

In this example, we first create a new WeakSet object called weakSet, which is a built-in object in JavaScript that represents a collection of unique objects where the objects are weakly held. We then create a plain object called object. We then use lodash.isWeakSet to check whether weakSet and object are WeakSet objects. As expected, _.isWeakSet(weakSet) returns true since weakSet is a WeakSet object, while _.isWeakSet(object) returns false since object is not a WeakSet object. By using lodash.isWeakSet, we can programmatically determine whether a given value is a WeakSet object, allowing us to perform operations on WeakSets with confidence.

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