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Updates examples. (#2219)

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* Updates examples.

* Added command link for hset.
This commit is contained in:
Simon Prickett
2022-08-15 13:39:28 +01:00
committed by GitHub
parent 60ad6aab0b
commit f3462abf33
19 changed files with 972 additions and 1019 deletions
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142
examples/cuckoo-filter.js
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@@ -1,81 +1,79 @@
// This example demonstrates the use of the Cuckoo Filter
// in the RedisBloom module (https://redisbloom.io/)
// in the RedisBloom module (https://redis.io/docs/stack/bloom/)
import { createClient } from 'redis';
async function cuckooFilter() {
const client = createClient();
const client = createClient();
await client.connect();
await client.connect();
// Delete any pre-existing Cuckoo Filter.
await client.del('mycuckoo');
// Delete any pre-existing Cuckoo Filter.
await client.del('mycuckoo');
// Reserve a Cuckoo Filter with a capacity of 10000 items.
// https://oss.redis.com/redisbloom/Cuckoo_Commands/#cfreserve
try {
await client.cf.reserve('mycuckoo', 10000);
console.log('Reserved Cuckoo Filter.');
} catch (e) {
console.log('Error, maybe RedisBloom is not installed?:');
console.log(e);
}
// Add items to Cuckoo Filter individually with CF.ADD command.
https://oss.redis.com/redisbloom/Cuckoo_Commands/#cfadd
await Promise.all([
client.cf.add('mycuckoo', 'leibale'),
client.cf.add('mycuckoo', 'simon'),
client.cf.add('mycuckoo', 'guy'),
client.cf.add('mycuckoo', 'suze'),
client.cf.add('mycuckoo', 'brian'),
client.cf.add('mycuckoo', 'steve'),
client.cf.add('mycuckoo', 'kyle'),
client.cf.add('mycuckoo', 'josefin'),
client.cf.add('mycuckoo', 'alex'),
client.cf.add('mycuckoo', 'nava'),
]);
// Add items to the Cuckoo Filter only if they don't exist in it...
// https://oss.redis.com/redisbloom/Cuckoo_Commands/#cfaddnx
const nxReply = await Promise.all([
client.cf.addNX('mycuckoo', 'kaitlyn'), // New
client.cf.addNX('mycuckoo', 'rachel'), // New
client.cf.addNX('mycuckoo', 'brian') // Previously added
]);
console.log('Added members to Cuckoo Filter.');
console.log('nxReply:');
// nxReply looks like this:
// [
// true,
// true,
// false
// ]
console.log(nxReply);
// Check whether a member exists with the CF.EXISTS command.
const simonExists = await client.bf.exists('mycuckoo', 'simon');
console.log(`simon ${simonExists ? 'may' : 'does not'} exist in the Cuckoo Filter.`);
// Get stats for the Cuckoo Filter with the CF.INFO command:
const info = await client.cf.info('mycuckoo');
// info looks like this:
// {
// size: 16440,
// numberOfBuckets: 8192,
// numberOfFilters: 1,
// numberOfInsertedItems: 12,
// numberOfDeletedItems: 0,
// bucketSize: 2,
// expansionRate: 1,
// maxIteration: 20
// }
console.log(info);
await client.quit();
// Reserve a Cuckoo Filter with a capacity of 10000 items.
// https://redis.io/commands/cf.reserve/
try {
await client.cf.reserve('mycuckoo', 10000);
console.log('Reserved Cuckoo Filter.');
} catch (e) {
console.log('Error, maybe RedisBloom is not installed?:');
console.log(e);
}
cuckooFilter();
// Add items to Cuckoo Filter individually with CF.ADD command.
// https://redis.io/commands/cf.add/
await Promise.all([
client.cf.add('mycuckoo', 'leibale'),
client.cf.add('mycuckoo', 'simon'),
client.cf.add('mycuckoo', 'guy'),
client.cf.add('mycuckoo', 'suze'),
client.cf.add('mycuckoo', 'brian'),
client.cf.add('mycuckoo', 'steve'),
client.cf.add('mycuckoo', 'kyle'),
client.cf.add('mycuckoo', 'josefin'),
client.cf.add('mycuckoo', 'alex'),
client.cf.add('mycuckoo', 'nava'),
]);
// Add items to the Cuckoo Filter only if they don't exist in it...
// https://redis.io/commands/cf.addnx/
const nxReply = await Promise.all([
client.cf.addNX('mycuckoo', 'kaitlyn'), // New
client.cf.addNX('mycuckoo', 'rachel'), // New
client.cf.addNX('mycuckoo', 'brian') // Previously added
]);
console.log('Added members to Cuckoo Filter.');
console.log('nxReply:');
// nxReply looks like this:
// [
// true,
// true,
// false
// ]
console.log(nxReply);
// Check whether a member exists with the CF.EXISTS command.
// https://redis.io/commands/cf.exists/
const simonExists = await client.bf.exists('mycuckoo', 'simon');
console.log(`simon ${simonExists ? 'may' : 'does not'} exist in the Cuckoo Filter.`);
// Get stats for the Cuckoo Filter with the CF.INFO command:
// https://redis.io/commands/cf.info/
const info = await client.cf.info('mycuckoo');
// info looks like this:
// {
// size: 16440,
// numberOfBuckets: 8192,
// numberOfFilters: 1,
// numberOfInsertedItems: 12,
// numberOfDeletedItems: 0,
// bucketSize: 2,
// expansionRate: 1,
// maxIteration: 20
// }
console.log(info);
await client.quit();