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offset javascript Code Snippet in 2023

arraybeginner

Last Updated: 28 January 2023

Moves the specified amount of elements to the end of the array.

  • Use Array.prototype.slice() twice to get the elements after the specified index and the elements before that.
  • Use the spread operator (...) to combine the two into one array.
  • If offset is negative, the elements will be moved from end to start.
const offset = (arr, offset) => [...arr.slice(offset), ...arr.slice(0, offset)];
offset([1, 2, 3, 4, 5], 2); // [3, 4, 5, 1, 2] offset([1, 2, 3, 4, 5], -2); // [4, 5, 1, 2, 3]

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