doc: add new site for doc

docs/olddocs/random.md

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+# 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>
+
+## Documentation
+
+### <span id="RandBytes">RandBytes</span>
+
+<p>Generate random byte slice.</p>
+
+<b>Signature:</b>
+
+```go
+func RandBytes(length int) []byte
+```
+
+<b>Example:</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:</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:</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:</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:</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:</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:</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:</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:</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)
+}
+```