moveWithin$ (original) (raw)
Move part of array within!
Alternatives: moveWithin, moveWithin$.
Similar: copy, copyWithin, moveWithin.
function moveWithin$(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, 6]; xarray.moveWithin$(x, 0, 1, 3); // → [ 2, 3, 1, 4, 5, 6 ] (2,3 to left)
x; // → [ 2, 3, 1, 4, 5, 6 ]
var x = [1, 2, 3, 4, 5, 6]; xarray.moveWithin$(x, 6, 3, 5); // → [ 1, 2, 3, 6, 4, 5 ] (4,5 to right)