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更新 UUID.md

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2025-03-03 15:24:42 +08:00
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commit 60bd9dc7e3
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UUID.md
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@@ -10,6 +10,7 @@ https://unpkg.com/uuidv7@1.0.2/dist/index.js
https://priver.dev/blog/postgres/implementing-v7-uuid-in-postgres/#:~:text=We%20use%20clock_timestamp%20to%20obtain%20the%20current%20time%2C,millisecond%20timestamp%20to%20a%20byte%20sequence%20using%20int8send. https://priver.dev/blog/postgres/implementing-v7-uuid-in-postgres/#:~:text=We%20use%20clock_timestamp%20to%20obtain%20the%20current%20time%2C,millisecond%20timestamp%20to%20a%20byte%20sequence%20using%20int8send.
``` sql
CREATE EXTENSION IF NOT EXISTS "uuid-ossp"; CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
create or replace function uuid_generate_v7() create or replace function uuid_generate_v7()
@@ -30,7 +31,7 @@ select encode(
$$ $$
language SQL language SQL
volatile; volatile;
```
3.Extract Timestamp from UUID v7 using Javascript 3.Extract Timestamp from UUID v7 using Javascript
@@ -39,6 +40,8 @@ https://park.is/blog_posts/20240803_extracting_timestamp_from_uuid_v7/
// extract Unix timestamp from a UUID v7 value without an external library // extract Unix timestamp from a UUID v7 value without an external library
在没有外部库的情况下从 UUID v7 值中提取 Unix 时间戳 在没有外部库的情况下从 UUID v7 值中提取 Unix 时间戳
``` javascript
function extractTimestampFromUUIDv7(uuid: string): Date { function extractTimestampFromUUIDv7(uuid: string): Date {
// split the UUID into its components // split the UUID into its components
const parts = uuid.split("-"); const parts = uuid.split("-");
@@ -62,4 +65,6 @@ const timestamp = extractTimestampFromUUIDv7(uuid);
// check output // check output
console.log(timestamp); console.log(timestamp);
// prints "Sat Aug 03 2024 07:09:56 GMT-0500 (Central Daylight Time)" // prints "Sat Aug 03 2024 07:09:56 GMT-0500 (Central Daylight Time)"
```