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weakset use cases javaScript

Business Man answered on July 3, 2022 Popularity 6/10 Helpfulness 1/10

answer weakset use cases javaScript

weakset use cases javaScript

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// Execute a callback on everything stored inside an object
function execRecursively(fn, subject, _refs = null){
  if(!_refs)
    _refs = new WeakSet();

  // Avoid infinite recursion
  if(_refs.has(subject))
    return;

  fn(subject);
  if("object" === typeof subject){
    _refs.add(subject);
    for(let key in subject)
      execRecursively(fn, subject[key], _refs);
  }
}

const foo = {
  foo: "Foo",
  bar: {
    bar: "Bar"
  }
};

foo.bar.baz = foo; // Circular reference!
execRecursively(obj => console.log(obj), foo);

Popularity 6/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: javascript

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Contributed on Jul 03 2022

Business Man

0 Answers Avg Quality 2/10

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weakset use cases javaScript

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