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matches javascript Code Snippet in 2022

objectintermediate

Last Updated: 26 November 2022

Compares two objects to determine if the first one contains equivalent property values to the second one.

  • Use Object.keys() to get all the keys of the second object.
  • Use Array.prototype.every(), Object.prototype.hasOwnProperty() and strict comparison to determine if all keys exist in the first object and have the same values.
const matches = (obj, source) => Object.keys(source).every( key => obj.hasOwnProperty(key) && obj[key] === source[key] );
matches({ age: 25, hair: 'long', beard: true }, { hair: 'long', beard: true }); // true matches({ hair: 'long', beard: true }, { age: 25, hair: 'long', beard: true }); // false

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