feat: more go

docs/2022-07-10-bootstrap-go.html

@@ -329,13 +329,13 @@ internal
       <h3 class="heading-element">
         Use
         <a href="https://pkg.go.dev/sync#Pool" rel="nofollow">sync.Pool</a> when
-        need to reuse object, mainly for <code>bytes.Buffer</code>
+        need to re-use object, mainly for <code>bytes.Buffer</code>
       </h3>
       <a
-        id="user-content-use-syncpool-when-need-to-reuse-object-mainly-for-bytesbuffer"
+        id="user-content-use-syncpool-when-need-to-re-use-object-mainly-for-bytesbuffer"
         class="anchor"
-        aria-label="Permalink: Use sync.Pool when need to reuse object, mainly for bytes.Buffer"
-        href="#use-syncpool-when-need-to-reuse-object-mainly-for-bytesbuffer"
+        aria-label="Permalink: Use sync.Pool when need to re-use object, mainly for bytes.Buffer"
+        href="#use-syncpool-when-need-to-re-use-object-mainly-for-bytesbuffer"
         ><span aria-hidden="true" class="octicon octicon-link"></span
       ></a>
     </div>
@@ -399,6 +399,34 @@ internal
   <span class="pl-k">return</span> <span class="pl-s1">zero</span>
 }</pre>
     </div>
+    <div class="markdown-heading">
+      <h3 class="heading-element">As go evolve, things should change</h3>
+      <a
+        id="user-content-as-go-evolve-things-should-change"
+        class="anchor"
+        aria-label="Permalink: As go evolve, things should change"
+        href="#as-go-evolve-things-should-change"
+        ><span aria-hidden="true" class="octicon octicon-link"></span
+      ></a>
+    </div>
+    <p>Since go 1.21:</p>
+    <ul>
+      <li>
+        Use <code>slices.SortFunc</code> instead of <code>sort.Slice</code>.
+      </li>
+      <li>
+        Use <code>ctx.WithoutCancel</code> to disconnect context from parent.
+      </li>
+      <li>Use <code>clear(m)</code> to clear map entirely.</li>
+    </ul>
+    <p>Since go 1.20:</p>
+    <ul>
+      <li>Use <code>errors.Join</code> for multiple errors.</li>
+    </ul>
+    <p>Since go 1.18:</p>
+    <ul>
+      <li>Use <code>any</code> instead of <code>interface{}</code>.</li>
+    </ul>
     <div class="markdown-heading">
       <h2 class="heading-element">External libs</h2>
       <a
@@ -653,13 +681,14 @@ internal
     <div class="markdown-heading">
       <h3 class="heading-element">
         Connect Redis with
-        <a href="https://github.com/redis/go-redis">redis/go-redis</a>
+        <a href="https://github.com/redis/go-redis">redis/go-redis</a> or
+        <a href="https://github.com/redis/rueidis">redis/rueidis</a>
       </h3>
       <a
-        id="user-content-connect-redis-with-redisgo-redis"
+        id="user-content-connect-redis-with-redisgo-redis-or-redisrueidis"
         class="anchor"
-        aria-label="Permalink: Connect Redis with redis/go-redis"
-        href="#connect-redis-with-redisgo-redis"
+        aria-label="Permalink: Connect Redis with redis/go-redis or redis/rueidis"
+        href="#connect-redis-with-redisgo-redis-or-redisrueidis"
         ><span aria-hidden="true" class="octicon octicon-link"></span
       ></a>
     </div>
@@ -952,6 +981,10 @@ stringer -type=Drink</pre>
       >
       to fix them.
     </p>
+    <p>
+      My heuristic for fieldalignment (not work all the time): pointer -&gt;
+      string -&gt; []byte -&gt; int64 -&gt; int32.
+    </p>
     <div class="highlight highlight-source-shell">
       <pre><span class="pl-c"><span class="pl-c">#</span> Install</span>
 go install golang.org/x/tools/go/analysis/passes/fieldalignment/cmd/fieldalignment@latest

posts/2022-07-10-bootstrap-go.md

@@ -158,7 +158,7 @@ if err := eg.Wait(); err != nil {
 Please don't use external libs for WorkerPool, I don't want to deal with
 dependency hell.
 
-### Use [sync.Pool](https://pkg.go.dev/sync#Pool) when need to reuse object, mainly for `bytes.Buffer`
+### Use [sync.Pool](https://pkg.go.dev/sync#Pool) when need to re-use object, mainly for `bytes.Buffer`
 
 Example:
 
@@ -210,6 +210,22 @@ func Zero[T any]() T {
 }
 ```
 
+### As go evolve, things should change
+
+Since go 1.21:
+
+- Use `slices.SortFunc` instead of `sort.Slice`.
+- Use `ctx.WithoutCancel` to disconnect context from parent.
+- Use `clear(m)` to clear map entirely.
+
+Since go 1.20:
+
+- Use `errors.Join` for multiple errors.
+
+Since go 1.18:
+
+- Use `any` instead of `interface{}`.
+
 ## External libs
 
 ### No need `vendor`
@@ -325,7 +341,7 @@ But `database/sql` has its own limit. For example, it is hard to get primary key
 after insert/update. So may be you want to use ORM for those cases. I hear that
 [go-gorm/gorm](https://github.com/go-gorm/gorm) is good.
 
-### Connect Redis with [redis/go-redis](https://github.com/redis/go-redis)
+### Connect Redis with [redis/go-redis](https://github.com/redis/go-redis) or [redis/rueidis](https://github.com/redis/rueidis)
 
 Be careful when use [HGETALL](https://redis.io/commands/hgetall/). If key not
 found, empty data will be returned not nil error. See
@@ -472,6 +488,9 @@ If you get `fieldalignment` error, use
 [fieldalignment](https://pkg.go.dev/golang.org/x/tools/go/analysis/passes/fieldalignment)
 to fix them.
 
+My heuristic for fieldalignment (not work all the time): pointer -> string ->
+[]byte -> int64 -> int32.
+
 ```sh
 # Install
 go install golang.org/x/tools/go/analysis/passes/fieldalignment/cmd/fieldalignment@latest