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66 lines
1.6 KiB
JavaScript
66 lines
1.6 KiB
JavaScript
2 years ago
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/*
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* Copyright 2022, The Cozo Project Authors.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
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* If a copy of the MPL was not distributed with this file,
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* You can obtain one at https://mozilla.org/MPL/2.0/.
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*/
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import {CozoDb} from "cozo-lib-wasm";
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const db = CozoDb.new();
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console.log(db);
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function query(script, params) {
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const result = JSON.parse(db.run(script, params || ''));
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console.log(result);
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if (result.ok) {
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const headers = result.headers || [];
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const rows = result.rows.map(row => {
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let ret = {};
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for (let i = 0; i < row.length; ++i) {
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ret[headers[i] || `(${i})`] = row[i];
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}
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return ret
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});
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console.table(rows)
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} else {
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console.error(result.display || result.message)
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}
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}
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query(`
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?[loving, loved] <- [['alice', 'eve'],
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['bob', 'alice'],
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['eve', 'alice'],
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['eve', 'bob'],
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['eve', 'charlie'],
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['charlie', 'eve'],
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['david', 'george'],
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['george', 'george']]
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:replace love {loving, loved}
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`);
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query(`
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alice_love_chain[person] := *love['alice', person]
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alice_love_chain[person] := alice_love_chain[in_person], *love[in_person, person]
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?[chained] := alice_love_chain[chained]
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`)
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query(`
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?[person, page_rank] <~ PageRank(*love[])
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:order -page_rank
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`);
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query(`
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?[loved_by_e_not_b] := *love['eve', loved_by_e_not_b], not *love['bob', loved_by_e_not_b]
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`);
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query(`
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?[] <- [[rand_uuid_v1()]]
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`);
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