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Code Issues Projects Releases Wiki Activity

feat: add RandIntSlice function

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dudaodong
2024-08-09 10:46:08 +08:00
parent 3f8e306ced
commit 483a286d8e
6 changed files with 124 additions and 26 deletions
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4
README.md
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@@ -1167,7 +1167,7 @@ import "github.com/duke-git/lancet/v2/random"
- **<big>UUIdV4</big>** : generate a random UUID of version 4 according to RFC 4122.
[[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/random.md#UUIdV4)]
[[play](https://go.dev/play/p/_Z9SFmr28ft)]
- **<big>RandUniqueIntSlice</big>** : generate a slice of random int of length n that do not repeat.
- **<big>RandUniqueIntSlice</big>** : generate a slice of random int that do not repeat.
[[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/random.md#RandUniqueIntSlice)]
[[play](https://go.dev/play/p/uBkRSOz73Ec)]
- **<big>RandSymbolChar</big>** : Generate a random symbol char of specified length.
@@ -1178,7 +1178,7 @@ import "github.com/duke-git/lancet/v2/random"
[[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/random.md#RandFloat)]
[[play](https://go.dev/play/p/zbD_tuobJtr)]
- **<big>RandFloats</big>** : Generate a slice of random float64 numbers of length n that do not repeat.
- **<big>RandFloats</big>** : Generate a slice of random float64 numbers that do not repeat.
[[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/random.md#RandFloats)]
[[play](https://go.dev/play/p/I3yndUQ-rhh)]

2
README_zh-CN.md
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@@ -1169,7 +1169,7 @@ import "github.com/duke-git/lancet/v2/random"
- **<big>UUIdV4</big>** : 生成 UUID v4 字符串。
[[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/random.md#UUIdV4)]
[[play](https://go.dev/play/p/_Z9SFmr28ft)]
- **<big>RandUniqueIntSlice</big>** : 生成一个不重复的长度为 n 的随机 int 切片。
- **<big>RandUniqueIntSlice</big>** : 生成一个不重复的随机int切片。
[[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/random.md#RandUniqueIntSlice)]
[[play](https://go.dev/play/p/uBkRSOz73Ec)]
- **<big>RandSymbolChar</big>** : 生成给定长度的随机符号字符串。

37
docs/api/packages/random.md
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@@ -31,6 +31,7 @@ import (
- [RandNumeralOrLetter](#RandNumeralOrLetter)
- [RandSymbolChar](#RandSymbolChar)
- [UUIdV4](#UUIdV4)
- [RandIntSlice](#RandIntSlice)
- [RandUniqueIntSlice](#RandUniqueIntSlice)
- [RandFloat](#RandFloat)
- [RandFloats](#RandFloats)
@@ -276,14 +277,40 @@ func main() {
}
```
### <span id="RandUniqueIntSlice">RandUniqueIntSlice</span>
### <span id="RandIntSlice">RandIntSlice</span>
<p>生成一个不重复的长度为n的随机int切片。</p>
<p>生成一个特定长度的随机int切片，数值范围[min, max)。</p>
<b>函数签名:</b>
```go
func RandUniqueIntSlice(n, min, max int) []int
func RandIntSlice(length, min, max int) []int
```
<b>示例:</b>
```go
package main
import (
"fmt"
"github.com/duke-git/lancet/v2/random"
)
func main() {
result := random.RandIntSlice(5, 0, 10)
fmt.Println(result) //[1 2 7 1 5] (random)
}
```
### <span id="RandUniqueIntSlice">RandUniqueIntSlice</span>
<p>生成一个特定长度的，数值不重复的随机int切片，数值范围[min, max)。</p>
<b>函数签名:</b>
```go
func RandUniqueIntSlice(length, min, max int) []int
```
<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/uBkRSOz73Ec)</span></b>
@@ -304,7 +331,7 @@ func main() {
### <span id="RandFloat">RandFloat</span>
<p>生成随机float64数字，可以指定范围和精度。</p>
<p>生成一个随机float64数值，可以指定精度。数值范围[min, max)。</p>
<b>函数签名:</b>
@@ -330,7 +357,7 @@ func main() {
### <span id="RandFloats">RandFloats</span>
<p>生成随机float64数字切片，指定长度，范围和精度.</p>
<p>生成一个特定长度的随机float64切片，可以指定数值精度。数值范围[min, max)。</p>
<b>函数签名:</b>

39
docs/en/api/packages/random.md
View File

@@ -31,6 +31,7 @@ import (
- [RandNumeralOrLetter](#RandNumeralOrLetter)
- [RandSymbolChar](#RandSymbolChar)
- [UUIdV4](#UUIdV4)
- [RandIntSlice](#RandIntSlice)
- [RandUniqueIntSlice](#RandUniqueIntSlice)
- [RandFloat](#RandFloat)
- [RandFloats](#RandFloats)
@@ -276,15 +277,41 @@ func main() {
}
```
### <span id="RandIntSlice">RandIntSlice</span>
### <span id="RandUniqueIntSlice">RandUniqueIntSlice</span>
<p>Generate a slice of random int of length n that do not repeat.</p>
<p>Generate a slice of random int. Number range in [min, max)</p>
<b>Signature:</b>
```go
func RandUniqueIntSlice(n, min, max int) []int
func RandIntSlice(length, min, max int) []int
```
<b>Example:</b>
```go
package main
import (
"fmt"
"github.com/duke-git/lancet/v2/random"
)
func main() {
result := random.RandIntSlice(5, 0, 10)
fmt.Println(result) //[1 4 7 1 5] (random)
}
```
### <span id="RandUniqueIntSlice">RandUniqueIntSlice</span>
<p>Generate a slice of random int of length that do not repeat. Number range in [min, max)</p>
<b>Signature:</b>
```go
func RandUniqueIntSlice(length, min, max int) []int
```
<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/uBkRSOz73Ec)</span></b>
@@ -331,12 +358,12 @@ func main() {
### <span id="RandFloats">RandFloats</span>
<p>Generate a slice of random float64 numbers of length n that do not repeat.</p>
<p>Generate a slice of random float64 numbers of length n that do not repeat. Number range in [min, max)</p>
<b>Signature:</b>
```go
func RandFloats(n int, min, max float64, precision int) []float64
func RandFloats(length int, min, max float64, precision int) []float64
```
<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/I3yndUQ-rhh)</span></b>

44
random/random.go
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@@ -42,6 +42,10 @@ func RandInt(min, max int) int {
min, max = max, min
}
if min == 0 && max == math.MaxInt {
return rand.Int()
}
return rand.Intn(max-min) + min
}
@@ -186,19 +190,35 @@ func UUIdV4() (string, error) {
return fmt.Sprintf("%x-%x-%x-%x-%x", uuid[0:4], uuid[4:6], uuid[6:8], uuid[8:10], uuid[10:]), nil
}
// RandUniqueIntSlice generate a slice of random int of length n that do not repeat.
// RandIntSlice generates a slice of random integers.
// The generated integers are between min and max (exclusive).
// Play: todo
func RandIntSlice(length, min, max int) []int {
if length <= 0 || min > max {
return []int{}
}
result := make([]int, length)
for i := range result {
result[i] = RandInt(min, max)
}
return result
}
// RandUniqueIntSlice generate a slice of random int of length that do not repeat.
// Play: https://go.dev/play/p/uBkRSOz73Ec
func RandUniqueIntSlice(n, min, max int) []int {
func RandUniqueIntSlice(length, min, max int) []int {
if min > max {
return []int{}
}
if n > max-min {
n = max - min
if length > max-min {
length = max - min
}
nums := make([]int, n)
used := make(map[int]struct{}, n)
for i := 0; i < n; {
nums := make([]int, length)
used := make(map[int]struct{}, length)
for i := 0; i < length; {
r := RandInt(min, max)
if _, use := used[r]; use {
continue
@@ -211,12 +231,12 @@ func RandUniqueIntSlice(n, min, max int) []int {
return nums
}
// RandFloats generate a slice of random float64 numbers of length n that do not repeat.
// RandFloats generate a slice of random float64 numbers of length that do not repeat.
// Play: https://go.dev/play/p/I3yndUQ-rhh
func RandFloats(n int, min, max float64, precision int) []float64 {
nums := make([]float64, n)
used := make(map[float64]struct{}, n)
for i := 0; i < n; {
func RandFloats(length int, min, max float64, precision int) []float64 {
nums := make([]float64, length)
used := make(map[float64]struct{}, length)
for i := 0; i < length; {
r := RandFloat(min, max, precision)
if _, use := used[r]; use {
continue

24
random/random_test.go
View File

@@ -196,3 +196,27 @@ func TestRandFloats(t *testing.T) {
assert.Equal(len(numbers), 5)
}
func TestRandIntSlice(t *testing.T) {
t.Parallel()
assert := internal.NewAssert(t, "TestRandIntSlice")
t.Run("empty slice", func(t *testing.T) {
numbers := RandIntSlice(-1, 1, 5)
assert.Equal([]int{}, numbers)
numbers = RandIntSlice(0, 1, 5)
assert.Equal([]int{}, numbers)
numbers = RandIntSlice(3, 5, 1)
assert.Equal([]int{}, numbers)
})
t.Run("random int slice", func(t *testing.T) {
numbers := RandIntSlice(5, 1, 1)
assert.Equal([]int{1, 1, 1, 1, 1}, numbers)
numbers = RandIntSlice(5, 1, 5)
assert.Equal(5, len(numbers))
})
}