Copies part of array to another.
Alternatives: copy, copy$.
Similar: copy, copyWithin, moveWithin.
This is part of package extra-array.
array.copy(x, y, [j], [i], [I]);
// x: target array
// y: source array
// j: write index (0)
// i: read start index (0)
// I: read end index (X)const array = require("extra-array");
var x = [1, 2, 3, 4, 5];
var y = [10, 20, 30];
array.copy(x, y);
// [ 10, 20, 30, 4, 5 ]
array.copy(x, y, 1);
// [ 1, 10, 20, 30, 5 ]
array.copy(x, y, 1, 1);
// [ 1, 20, 30, 4, 5 ]
array.copy(x, y, 1, 1, 2);
// [ 1, 20, 3, 4, 5 ]