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forOwn javascript Code Snippet in 2023

objectintermediate

Last Updated: 28 January 2023

Iterates over all own properties of an object, running a callback for each one.

  • Use Object.keys(obj) to get all the properties of the object.
  • Use Array.prototype.forEach() to run the provided function for each key-value pair.
  • The callback receives three arguments - the value, the key and the object.
const forOwn = (obj, fn) => Object.keys(obj).forEach(key => fn(obj[key], key, obj));
forOwn({ foo: 'bar', a: 1 }, v => console.log(v)); // 'bar', 1

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