@extra-iterable/copy-within

Copies part of iterable within. :package: :smileycat: :running: :vhs: :moon: :scroll: :newspaper: :bluebook:

Alternatives: copy, copyWithin.
Similar: copy, fill.

This is part of package extra-iterable.

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

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

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

[...iterable.copyWithin(x, 3, 1)];
// [ 1, 2, 3, 2, 3 ]

[...iterable.copyWithin(x, 3, 1, 2)];
// [ 1, 2, 3, 2, 5 ]

References

• Array.prototype.copyWithin: MDN web docs
• immutable-iterable-prototype: @azu