doc: update doc for slice retry random package

docs/en/api/packages/random.md

@@ -0,0 +1,277 @@
+# Random
+
+Package random implements some basic functions to generate random int and string.
+
+<div STYLE="page-break-after: always;"></div>
+
+## Source:
+
+-   [https://github.com/duke-git/lancet/blob/main/random/random.go](https://github.com/duke-git/lancet/blob/main/random/random.go)
+
+<div STYLE="page-break-after: always;"></div>
+
+## Usage:
+
+```go
+import (
+    "github.com/duke-git/lancet/v2/random"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## Index
+
+-   [RandBytes](#RandBytes)
+-   [RandInt](#RandInt)
+-   [RandString](#RandString)
+-   [RandUpper](#RandUpper)
+-   [RandLower](#RandLower)
+-   [RandNumeral](#RandNumeral)
+-   [RandNumeralOrLetter](#RandNumeralOrLetter)
+-   [UUIdV4](#UUIdV4)
+-   [RandUniqueIntSlice](#RandUniqueIntSlice)
+
+<div STYLE="page-break-after: always;"></div>
+
+<link rel="stylesheet" type="text/css" href="/styles/api_doc.css">
+
+## Documentation
+
+### <span id="RandBytes">RandBytes</span>
+
+<p>Generate random byte slice.</p>
+
+<b>Signature:</b>
+
+```go
+func RandBytes(length int) []byte
+```
+
+<b>Example:<span class="run-container">[Run](https://go.dev/play/p/EkiLESeXf8d)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/random"
+)
+
+func main() {
+    randBytes := random.RandBytes(4)
+    fmt.Println(randBytes)
+}
+```
+
+### <span id="RandInt">RandInt</span>
+
+<p>Generate random int between min and max, may contain min, not max.</p>
+
+<b>Signature:</b>
+
+```go
+func RandInt(min, max int) int
+```
+
+<b>Example:<span class="run-container">[Run](https://go.dev/play/p/pXyyAAI5YxD)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/random"
+)
+
+func main() {
+    rInt := random.RandInt(1, 10)
+    fmt.Println(rInt)
+}
+```
+
+### <span id="RandString">RandString</span>
+
+<p>Generate random given length string. only contains letter (a-zA-Z)</p>
+
+<b>Signature:</b>
+
+```go
+func RandString(length int) string
+```
+
+<b>Example:<span class="run-container">[Run](https://go.dev/play/p/W2xvRUXA7Mi)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/random"
+)
+
+func main() {
+    randStr := random.RandString(6)
+    fmt.Println(randStr) //pGWsze
+}
+```
+
+### <span id="RandUpper">RandUpper</span>
+
+<p>Generate a random upper case string</p>
+
+<b>Signature:</b>
+
+```go
+func RandUpper(length int) string
+```
+
+<b>Example:<span class="run-container">[Run](https://go.dev/play/p/29QfOh0DVuh)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/random"
+)
+
+func main() {
+    randStr := random.RandString(6)
+    fmt.Println(randStr) //PACWGF
+}
+```
+
+### <span id="RandLower">RandLower</span>
+
+<p>Generate a random lower case string</p>
+
+<b>Signature:</b>
+
+```go
+func RandLower(length int) string
+```
+
+<b>Example:<span class="run-container">[Run](https://go.dev/play/p/XJtZ471cmtI)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/random"
+)
+
+func main() {
+    randStr := random.RandLower(6)
+    fmt.Println(randStr) //siqbew
+}
+```
+
+### <span id="RandNumeral">RandNumeral</span>
+
+<p>Generate a random numeral string</p>
+
+<b>Signature:</b>
+
+```go
+func RandNumeral(length int) string
+```
+
+<b>Example:<span class="run-container">[Run](https://go.dev/play/p/g4JWVpHsJcf)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/random"
+)
+
+func main() {
+    randStr := random.RandNumeral(6)
+    fmt.Println(randStr) //035172
+}
+```
+
+### <span id="RandNumeralOrLetter">RandNumeralOrLetter</span>
+
+<p>generate a random numeral or letter string</p>
+
+<b>Signature:</b>
+
+```go
+func RandNumeralOrLetter(length int) string
+```
+
+<b>Example:<span class="run-container">[Run](https://go.dev/play/p/19CEQvpx2jD)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/random"
+)
+
+func main() {
+    randStr := random.RandNumeralOrLetter(6)
+    fmt.Println(randStr) //0aW7cQ
+}
+```
+
+### <span id="UUIdV4">UUIdV4</span>
+
+<p>Generate a random UUID of version 4 according to RFC 4122.</p>
+
+<b>Signature:</b>
+
+```go
+func UUIdV4() (string, error)
+```
+
+<b>Example:<span class="run-container">[Run](https://go.dev/play/p/_Z9SFmr28ft)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/random"
+)
+
+func main() {
+    uuid, err := random.UUIdV4()
+    if err != nil {
+        return
+    }
+    fmt.Println(uuid)
+}
+```
+
+
+### <span id="RandUniqueIntSlice">RandUniqueIntSlice</span>
+
+<p>Generate a slice of random int of length n that do not repeat.</p>
+
+<b>Signature:</b>
+
+```go
+func RandUniqueIntSlice(n, min, max int) []int
+```
+
+<b>Example:<span class="run-container">[Run](https://go.dev/play/p/uBkRSOz73Ec)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/random"
+)
+
+func main() {
+    result := random.RandUniqueIntSlice(5, 0, 10)
+    fmt.Println(result) //[0 4 7 1 5] (random)
+}
+```

docs/en/api/packages/retry.md

@@ -0,0 +1,263 @@
+# Retry
+
+Package retry is for executing a function repeatedly until it was successful or canceled by the context.
+
+<div STYLE="page-break-after: always;"></div>
+
+## Source:
+
+-   [https://github.com/duke-git/lancet/blob/main/retry/retry.go](https://github.com/duke-git/lancet/blob/main/retry/retry.go)
+
+<div STYLE="page-break-after: always;"></div>
+
+## Usage:
+
+```go
+import (
+    "github.com/duke-git/lancet/v2/retry"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## Index
+
+-   [Context](#Context)
+-   [Retry](#Retry)
+-   [RetryFunc](#RetryFunc)
+-   [RetryDuration](#RetryDuration)
+-   [RetryTimes](#RetryTimes)
+
+<div STYLE="page-break-after: always;"></div>
+
+<link rel="stylesheet" type="text/css" href="/styles/api_doc.css">
+
+## Documentation
+
+### <span id="Context">Context</span>
+
+<p>Set retry context config, can cancel the retry with context.</p>
+
+<b>Signature:</b>
+
+```go
+func Context(ctx context.Context)
+```
+
+<b>Example:<span class="run-container">[Run](https://go.dev/play/p/xnAOOXv9GkS)</span></b>
+
+```go
+import (
+    "context"
+    "errors"
+    "fmt"
+    "github.com/duke-git/lancet/v2/retry"
+    "time"
+)
+
+func main() {
+    ctx, cancel := context.WithCancel(context.TODO())
+
+    number := 0
+    increaseNumber := func() error {
+        number++
+        if number > 3 {
+            cancel()
+        }
+        return errors.New("error occurs")
+    }
+
+    duration := retry.RetryDuration(time.Microsecond*50)
+
+    retry.Retry(increaseNumber,
+        duration,
+        retry.Context(ctx),
+    )
+
+    fmt.Println(number)
+
+    // Output:
+    // 4
+}
+```
+
+### <span id="RetryFunc">RetryFunc</span>
+
+<p>Function that retry executes.</p>
+
+<b>Signature:</b>
+
+```go
+type RetryFunc func() error
+```
+
+<b>Example:<span class="run-container">[Run](https://go.dev/play/p/nk2XRmagfVF)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "errors"
+    "log"
+    "github.com/duke-git/lancet/v2/retry"
+)
+
+func main() {
+    number := 0
+    var increaseNumber retry.RetryFunc = func() error {
+        number++
+        if number == 3 {
+            return nil
+        }
+        return errors.New("error occurs")
+    }
+
+    duration := retry.RetryDuration(time.Microsecond*50)
+
+    err := retry.Retry(increaseNumber, duration)
+    if err != nil {
+        return
+    }
+
+    fmt.Println(number)
+
+    // Output:
+    // 3
+}
+```
+
+### <span id="RetryTimes">RetryTimes</span>
+
+<p>Set times of retry. Default times is 5.</p>
+
+<b>Signature:</b>
+
+```go
+func RetryTimes(n uint)
+```
+
+<b>Example:<span class="run-container">[Run](https://go.dev/play/p/ssfVeU2SwLO)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "errors"
+    "log"
+    "github.com/duke-git/lancet/v2/retry"
+)
+
+func main() {
+    number := 0
+
+    increaseNumber := func() error {
+        number++
+        if number == 3 {
+            return nil
+        }
+        return errors.New("error occurs")
+    }
+
+    err := retry.Retry(increaseNumber, retry.RetryTimes(2))
+    if err != nil {
+        fmt.Println(err)
+    }
+
+    // Output:
+    // function main.main.func1 run failed after 2 times retry
+}
+```
+
+### <span id="RetryDuration">RetryDuration</span>
+
+<p>Set duration of retries. Default duration is 3 second.</p>
+
+<b>Signature:</b>
+
+```go
+func RetryDuration(d time.Duration)
+```
+
+<b>Example:<span class="run-container">[Run](https://go.dev/play/p/nk2XRmagfVF)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "errors"
+    "log"
+    "github.com/duke-git/lancet/v2/retry"
+)
+
+func main() {
+    number := 0
+    increaseNumber := func() error {
+        number++
+        if number == 3 {
+            return nil
+        }
+        return errors.New("error occurs")
+    }
+
+    duration := retry.RetryDuration(time.Microsecond*50)
+
+    err := retry.Retry(increaseNumber, duration)
+    if err != nil {
+        return
+    }
+
+    fmt.Println(number)
+
+    // Output:
+    // 3
+}
+```
+
+### <span id="Retry">Retry</span>
+
+<p>Executes the retryFunc repeatedly until it was successful or canceled by the context.</p>
+
+<b>Signature:</b>
+
+```go
+func Retry(retryFunc RetryFunc, opts ...Option) error
+```
+
+<b>Example:<span class="run-container">[Run](https://go.dev/play/p/nk2XRmagfVF)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "errors"
+    "log"
+    "github.com/duke-git/lancet/v2/retry"
+)
+
+func main() {
+    number := 0
+    increaseNumber := func() error {
+        number++
+        if number == 3 {
+            return nil
+        }
+        return errors.New("error occurs")
+    }
+
+    duration := retry.RetryDuration(time.Microsecond*50)
+
+    err := retry.Retry(increaseNumber, duration)
+    if err != nil {
+        return
+    }
+
+    fmt.Println(number)
+
+    // Output:
+    // 3
+}
+```