kataan 0.0.4

A high-performance JavaScript engine written in pure Rust. Library, C FFI, and CLI.
Documentation 
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/*---
description: Array.isArray, flat, fill, findIndex
esid: sec-properties-of-the-array-prototype-object
---*/
assert.sameValue(Array.isArray([1, 2]), true);
assert.sameValue(Array.isArray("no"), false);
assert.sameValue([1, [2, [3]]].flat().length, 3);
assert.sameValue([0, 0, 0].fill(7).join(","), "7,7,7");
assert.sameValue([5, 10, 15].findIndex(function (x) { return x === 10; }), 1);