AI solution for JavaScript Coding Question on BFE.dev
26. implement Object.assign()

Sure, here is an implementation of Object.assign():

function myAssign(target, ...sources) {
  for (let source of sources) {
    for (let key in source) {
      if (source.hasOwnProperty(key)) {
        target[key] = source[key];
      }
    }
  }
  return target;
}

Here's an explanation of how it works:

• The myAssign() function takes a target object (the object that properties will be copied to), and one or more source objects (the objects that properties will be copied from).
• We use the for...of loop to iterate over all the source objects that were passed to myAssign().
• For each source object, we use a for...in loop to iterate over all the properties of the source object.
• We use the hasOwnProperty() method to check if the current property is actually a property of the source object, and not inherited from its prototype.
• If the current property is a property of the source object, we copy it to the target object using target[key] = source[key].
• Finally, we return the target object that now has all the copied properties.

With this implementation, we can use myAssign() just like we would use Object.assign(). For example:

const obj1 = { a: 1 };
const obj2 = { b: 2 };
const obj3 = { c: 3 };

const newObj = myAssign({}, obj1, obj2, obj3);
console.log(newObj); // { a: 1, b: 2, c: 3 }

I hope this helps! Let me know if you have any questions.