copyWithin$ (original) (raw)

Copy part of array within!

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

function copyWithin$(x, j, i, I) // x: an array (updated!) // j: write index [0] // i: read begin index [0] // I: read end index [|x|]

const xarray = require('extra-array');

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

x; // → [ 1, 2, 3, 1, 2 ]

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

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

References

• Array.copyWithin() : MDN Web Docs