update

notes/db/kv/redis/redis-faq.md

@@ -74,3 +74,47 @@ redis-cli
 ulimit -Sn 100000
 sysctl -w fs.file-max=100000
 ```
+
+## LOCK
+
+- key 为 lock name
+- value 为 holder
+
+**acquire**
+
+```
+SET key uuid PX timeout NX
+```
+
+**release**
+
+```lua
+if redis.call('GET', KEYS[1]) == ARGV[1] then
+  return redis.call('DEL', KEYS[1])
+end
+return 0
+```
+
+**extend**
+
+```lua
+if redis.call('GET', KEYS[1]) == ARGV[1] then
+  return redis.call('PEXPIRE', KEYS[1], ARGV[2])
+end
+return 0
+```
+
+- 其他方案
+
+```
+WATCH key  # Begin watching the key for changes
+GET key    # Retrieve its value, return an error if not equal to the lock's UUID
+MULTI      # Start transaction
+DEL key    # Delete the key
+EXEC       # Execute the transaction, which will fail if the key had expired
+```
+
+- 参考
+  - [mike-marcacci/node-redlock](https://github.com/mike-marcacci/node-redlock)
+  - https://redis.io/docs/latest/develop/use/patterns/distributed-locks/
+  - [microfleet/ioredis-lock](https://github.com/microfleet/ioredis-lock)

notes/dev/design/design-drive.md

@@ -460,13 +460,26 @@ export type TemporaryUrlOptions = MiscellaneousOptions & {
 
 ## Object
 
+- Hash 分层
+- CAS (Content Addressable Storage) 内容可寻址存储系统
+  - hash -> object
+  - kv
+- FCS - fixed content storage
+
 **git**
 
 - .git/objects
 - .git/objects/pack - 已打包的对象文件 - .pack+.idx
 - .git/objects/info - 对象的附加信息
 - `.git/objects/[0-9a-f]{2}` - 对象的哈希前两位
 - `.git/objects/[0-9a-f]{2}/[0-9a-f]{38}` - 对象的剩余哈希值
+- git-annex
+  - .git/annex/objects/12/34/SHA256E-s1024--1234567890abcdef
+    - `HASH-sSIZE--FILENAME`
+    - 对象为 symlink / pointer
+  - 参考
+    - https://git-annex.branchable.com/internals/
+    - https://git-annex.branchable.com/internals/hashing/
 
 **juicefs**
 
@@ -583,7 +596,28 @@ type sustained struct {
 }
 ```
 
+## Glossory
+
+- path - 完整路径 `/home/user/documents/report.pdf`
+  - path=dirname+basename
+- filename - 文件名 `report.pdf`
+  - name+extname
+    - extname 包含 `.`
+  - `^[^\\/:*?"<>|]+(\.[a-zA-Z0-9]+)?$`
+  - reserved
+    - Windows
+      - 保留文件名 CON, PRN, AUX, NUL, COM{1..9}, LPT{1..9} - 大小写不敏感
+        - `NUL.txt` `NUL.tar.gz` 也等同于 `NUL`
+        - https://learn.microsoft.com/en-us/windows/win32/fileio/naming-a-file
+      - 保留字符 `/\:*?"<>|`
+      - 特殊文件名 `Thumbs.db`, `desktop.ini`
+    - macOS
+      - `:` - HFS 分隔符
+- dirname - 目录名 `/home/user/documents`
+- basename - 指路径中最后一部分的名称，无论它是文件还是目录
+
 ## 参考 {#reference}
 
+- https://en.wikipedia.org/wiki/Filename
 - https://github.com/opencurve/curve/blob/master/docs/cn/chunkserver_design.md
   - https://github.com/opencurve/curve/blob/master/docs/en/chunkserver_design_en.md

notes/dev/std/unicode/unicode-faq.md

@@ -86,3 +86,74 @@ dos2unix test.xml
 - GBK - 1995年，21003个字符
   - 是 GB2312 的扩展/升级
   - 兼容 GB2312
+
+## Normalize
+
+- NFC
+  - Canonical Decomposition, followed by Canonical Composition.
+- NFD
+  - Canonical Decomposition.
+- NFKC
+  - Compatibility Decomposition, followed by Canonical Composition.
+- NFKD
+  - Compatibility Decomposition.
+- Lone leading surrogate
+  - `ab\uD800`
+  - `ab\uD800c`
+- Lone trailing surrogate
+  - `\uDFFFab`
+  - `c\uDFFFab`
+- JS
+  - String.prototype.isWellFormed - Chrome 111+, Safari 16.4+, Node 20.0+
+    - 避免 encodeURI 时出错
+  - String.prototype.toWellFormed
+  - String.prototype.normalize - Chrome 34+, Safari 10.1+, Node 0.12+
+
+```js
+{
+  let string1 = '\u00F1'; // ñ
+  let string2 = '\u006E\u0303'; // ñ
+
+  string1 = string1.normalize('NFD');
+  string2 = string2.normalize('NFD');
+
+  console.log(string1 === string2); // true
+  console.log(string1.length); // 2
+  console.log(string2.length); // 2
+}
+
+{
+  let string1 = '\u00F1'; // ñ
+  let string2 = '\u006E\u0303'; // ñ
+
+  string1 = string1.normalize('NFC');
+  string2 = string2.normalize('NFC');
+
+  console.log(string1 === string2); // true
+  console.log(string1.length); // 1
+  console.log(string2.length); // 1
+  console.log(string2.codePointAt(0).toString(16)); // f1
+}
+
+{
+  let string1 = '\uFB00';
+  let string2 = '\u0066\u0066';
+
+  console.log(string1); // ff
+  console.log(string2); // ff
+  console.log(string1 === string2); // false
+  console.log(string1.length); // 1
+  console.log(string2.length); // 2
+
+  string1 = string1.normalize('NFKD');
+  string2 = string2.normalize('NFKD');
+
+  console.log(string1); // ff <- visual appearance changed
+  console.log(string2); // ff
+  console.log(string1 === string2); // true
+  console.log(string1.length); // 2
+  console.log(string2.length); // 2
+}
+```
+
+- https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/normalize

notes/dev/theory/design-pattern.md

@@ -4,6 +4,11 @@ title: 设计模式
 
 # 设计模式
 
+- 参考
+  - https://en.wikipedia.org/wiki/Design_Patterns
+  - https://sourcemaking.com/
+  - https://www.baeldung.com/design-patterns-series
+
 ## 网络
 
 - Control plane & Data plane
@@ -17,3 +22,15 @@ title: 设计模式
 ## 并发
 
 ## 分布式
+
+## application context
+
+- ApplicationContext as alternative to ioc
+- 作为 DI 的 Container
+- IoC 的 容器
+- Encapsulate Context
+- Context Object
+- 参考
+  - http://www.corej2eepatterns.com/ContextObject.htm
+  - https://www.baeldung.com/cs/context-design-pattern
+  - https://stackoverflow.com/a/16161219/1870054

notes/hardware/power/README.md

@@ -0,0 +1,31 @@
+---
+title: 电源
+---
+
+# 电源
+
+- [电池](./battery.md)
+- [UPS](./ups.md)
+
+## Power consumption
+
+- RasPi0 / Pi Zero W
+  - 100 mA: 没有连接外设，WiFi和蓝牙关闭
+  - 160 mA: 蓝牙开启
+  - 170 mA: WiFi开启
+  - 230 mA: 相机连接并捕捉图像
+- ESP32
+  - Active Mode - RTC + ULP + ESP32 Core + 外设 + Radio + WiFi + BT
+    - 160~260mA - WiFi Tx 13dBm~21dBm
+    - 120mA - WiFi/BT Tx 0dBm
+    - 80-90mA - WiFi/BT Rx & listening
+  - Modem Sleep - RTC + UPL + ESP32 Core
+  - Light Sleep - RTC + UPL + ESP32 Core Paused
+  - Deep Sleep - RTC + UPL
+  - Hibernation - RTC
+
+---
+
+- 参考
+  - https://raspi.tv/2017/how-much-power-does-pi-zero-w-use
+  - https://lastminuteengineers.com/esp32-sleep-modes-power-consumption/

notes/hardware/battery/README.md → notes/hardware/power/battery.md

@@ -41,11 +41,11 @@ title: 电池
   - 可生产为不同形状
 
 | Size | 尺寸 | 容量(mAh)                                                                                          | 大小(直径 ✖️ 高) |
-| ---- | ---- | -------------------------------------------------------------------------------------------------- | ---------------- |
-| AAA  | 七号 | 200 (alkaline)<br/>540 (carbon–zinc)<br/>800–1000 (NiMH)                                           | 10.5 × 44.5      |
-| AA   | 五号 | 2700 (alkaline)<br/>1100 (carbon–zinc)<br/>3000 (Li–FeS2)<br/>1700–2700 (NiMH)<br/>600–1000 (NiCd) | 14.5 × 50.5      |
-| C    | 二号 | 8000 (alkaline)<br/>3800 (carbon–zinc)<br/>4500–6000M<br/>(NiMH)                                   | 26.2 × 50        |
-| D    | 一号 | 12000 (alkaline)<br/>8000 (carbon–zinc)<br/>2200–11000 (NiMH)<br/>2000-5500 (NiCd)                 | 34.2 × 61.5      |
+| ---: | ---- | -------------------------------------------------------------------------------------------------- | ---------------- |
+|  AAA | 七号 | 200 (alkaline)<br/>540 (carbon–zinc)<br/>800–1000 (NiMH)                                           | 10.5 × 44.5      |
+|   AA | 五号 | 2700 (alkaline)<br/>1100 (carbon–zinc)<br/>3000 (Li–FeS2)<br/>1700–2700 (NiMH)<br/>600–1000 (NiCd) | 14.5 × 50.5      |
+|    C | 二号 | 8000 (alkaline)<br/>3800 (carbon–zinc)<br/>4500–6000M<br/>(NiMH)                                   | 26.2 × 50        |
+|    D | 一号 | 12000 (alkaline)<br/>8000 (carbon–zinc)<br/>2200–11000 (NiMH)<br/>2000-5500 (NiCd)                 | 34.2 × 61.5      |
 
 ## 锂电池
 

notes/languages/c/cpp.md

@@ -0,0 +1,25 @@
+---
+title: cpp
+---
+
+# cpp
+
+- cpp -> C PreProcessor
+- `__FILE__`, `__LINE__`
+- `__FUNCTION__`
+- `__func__` - C++11
+
+**predefined identifier**
+
+```
+__LINE__: The line number of the current source line (a decimal constant).
+__FILE__: The presumed name of the source file (a character string literal).
+__DATE__: The date of translation of the source file (a character string literal...)
+__TIME__: The time of translation of the source file (a character string literal...)
+__STDC__: Whether__STDC__ is predefined
+__cplusplus: The name __cplusplus is defined to the value 199711L when compiling a C ++ translation unit
+```
+
+- http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1642.html
+- https://en.cppreference.com/w/cpp/utility/source_location
+  - `std::source_location`

notes/languages/php/php-conf.md

@@ -8,3 +8,10 @@ tags:
 ```bash
 php --ini # 配置目录和加载的配置文件
 ```
+
+```ini
+memory_limit=128M
+```
+
+
+- https://www.php.net/manual/en/ini.core.php

notes/languages/regexp.md

@@ -77,11 +77,54 @@ const notThis = /^(?:(?!this).)*$/;
 
 ## JavaScript
 
+:::caution
+
+- RegExp 是有状态的
+  - lastIndex
+  - 连续执行 `exec()` 可能结果不一样
+
+:::
+
+|                                         synbax | for                             | notes                   |
+| ---------------------------------------------: | ------------------------------- | ----------------------- |
+|                                           `\N` | Backreference                   |
+|                                     `\k<name>` | Named backreference             | Chrome 64+, Safari 11.1 |
+|                                   `\c[A-Za-z]` | control character = `char % 32` |
+|                                           `\0` | NULL, U+0000                    |
+|                             `(?<name>pattern)` | Named capture group             | Chrome 64+, Safari 11.1 |
+|                                  `(?:pattern)` | Non-capturing group             |
+|                    `(?=pattern)`,`(?!pattern)` | Lookahead assertion             |
+|                  `(?<=pattern)`,`(?<!pattern)` | Lookbehind assertion            |
+| `(?flags1:pattern)`,`(?flags1-flags2:pattern)` | Modifier, ims, `-flags2` 是关闭 |
+
+- flags
+  - i - ignoreCase
+  - m - multiline
+  - s - dotAll
+  - g - global
+  - y - sticky
+  - d - hasIndices
+  - u - unicode
+  - v - unicodeSets
+- atoms - 正则最基础单元
+- `\c[A-Za-z]`
+  - 控制字符
+  - = `char % 32`
+  - 因为大写和小写相差 32 因此 `\cJ` 和 `\cj` 是一样的
+  - `\cJ` = `\n`
 - replacement - 替换
   - `$$` -> `$`
   - `$&`
   - `$\``
   - `$'`
   - `$<n>`
   - replacer(match,p1,p2,offset,wholeString,namedGroups)
-
+- `/u` -> unicode
+  - 影响 `\w`, `\u{HHHH}`, `\uHHHH`
+  - `/[\p{L}\p{N}]+/u`
+- RegExp `/v`, unicodeSets
+  - `/^\p{RGI_Emoji}$/v.test('😵‍💫')`=true - Unicode string properties
+  - `/^[\q{😵‍💫}]$/v.test('😵‍💫')`=true - \q for String literals
+  - `/^[\p{RGI_Emoji}--\q{😵‍💫}]$/v.test('😵‍💫')`=false - 支持排除
+- 参考
+  - [Regular expressions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions)

notes/os/linux/shell/shell-faq.md

@@ -15,6 +15,12 @@ tar -xzvf backup.tar.gz -C ./restored                     # 恢复
 tar -I zstd -xvf archive.tar.zst                          # zstd
 ```
 
+## ip
+
+```bash
+ip -o -4 addr show | grep -v veth | awk '{print $2, $4}'
+```
+
 ## skip first n line
 
 ```bash

notes/platform/youtube.md

@@ -4,6 +4,15 @@ title: Youtube
 
 # Youtube
 
+- YouTube Premium
+  - 去广告
+  - 后台播放 & 画中画
+  - 离线下载
+  - YouTube Music Premium
+  - YouTube Originals
+- 参考
+  - 国家地区 https://support.google.com/youtube/answer/6307365
+
 **会员价格**
 
 | 地区     | 价格 USD/月         | 差额 USD/月 |