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ant/examples/spec/destructuring.js
32b18f1b1662ast

destructuring.js
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			import { test, testDeep, summary } from './helpers.js';

			console.log('Destructuring Tests\n');

			const [a, b, c] = [1, 2, 3];
			test('array destructure a', a, 1);
			test('array destructure b', b, 2);
			test('array destructure c', c, 3);

			const [first, , third] = [1, 2, 3];
			test('skip element first', first, 1);
			test('skip element third', third, 3);

			const [x, y, z = 10] = [1, 2];
			test('array default x', x, 1);
			test('array default z', z, 10);

			const [head, ...tail] = [1, 2, 3, 4];
			test('array rest head', head, 1);
			testDeep('array rest tail', tail, [2, 3, 4]);

			const { name, age } = { name: 'Alice', age: 30 };
			test('object destructure name', name, 'Alice');
			test('object destructure age', age, 30);

			const { foo: renamed } = { foo: 'bar' };
			test('object rename', renamed, 'bar');

			const { val = 'default' } = {};
			test('object default', val, 'default');

			const { p, ...rest } = { p: 1, q: 2, r: 3 };
			test('object rest p', p, 1);
			test('object rest has q', rest.q, 2);
			test('object rest has r', rest.r, 3);

			const nested = { outer: { inner: 42 } };
			const { outer: { inner } } = nested;
			test('nested destructure', inner, 42);

			function destruct({ a, b }) {
			return a + b;
			}
			test('param destructure', destruct({ a: 3, b: 4 }), 7);

			function arrayParam([x, y]) {
			return x * y;
			}
			test('array param destructure', arrayParam([3, 4]), 12);

			const swap = ([a, b]) => [b, a];
			testDeep('swap via destructure', swap([1, 2]), [2, 1]);

			summary();

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