copyWithin$

Copies part of array within. 📦 😺 🏃 📼 🌔 📜 📰 📘

Alternatives: copyWithin, copyWithin$.
Similar: copy, copyWithin, moveWithin.

array.copyWithin$(x, [j], [i], [I]);
// x: an array (updated)
// j: write index (0)
// i: read start index (0)
// I: read end index (X)
// → x

const array = require("extra-array");

var x = [1, 2, 3, 4, 5];
array.copyWithin$(x, 3);
// [ 1, 2, 3, 1, 2 ]

x;
// [ 1, 2, 3, 1, 2 ]

var x = [1, 2, 3, 4, 5];
array.copyWithin$(x, 3, 1);
// [ 1, 2, 3, 2, 3 ]

var x = [1, 2, 3, 4, 5];
array.copyWithin$(x, 3, 1, 2);
// [ 1, 2, 3, 2, 5 ]

References

• Array.prototype.copyWithin: MDN web docs