ES6 - Use Destructuring Assignment with the Rest Parameter to Reassign Array Elements

what does it mean

 const source = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
 function removeFirstTwo(list) {  
  // Only change code below this line
  const [,,...arr] = list; // Change this line
  // Only change code above this line
  return arr;
}
const arr = removeFirstTwo(source);
console.log(arr);

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Challenge: ES6 - Use Destructuring Assignment with the Rest Parameter to Reassign Array Elements

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What does what mean?

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