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dudaodong 526e568d0e doc: add doc for Substring

2022-12-29 20:03:59 +08:00

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Strutil

strutil包含处理字符串的相关函数。

源码:

https://github.com/duke-git/lancet/blob/main/strutil/string.go

用法:

import (
    "github.com/duke-git/lancet/v2/strutil"
)

Documentation文档

After

返回源字符串中特定字符串首次出现时的位置之后的子字符串

函数签名:

func After(s, char string) string

例子:

import (
	"fmt"
	"github.com/duke-git/lancet/v2/strutil"
)

func main() {
	s1 := strutil.After("lancet", "")
	fmt.Println(s1) //lancet

	s2 := strutil.After("github.com/test/lancet", "/")
	fmt.Println(s2) //test/lancet

	s3 := strutil.After("github.com/test/lancet", "test")
	fmt.Println(s3) // /lancet
}

AfterLast

返回源字符串中指定字符串最后一次出现时的位置之后的子字符串

函数签名:

func AfterLast(s, char string) string

例子:

import (
	"fmt"
	"github.com/duke-git/lancet/v2/strutil"
)

func main() {
	s1 := strutil.AfterLast("lancet", "")
	fmt.Println(s1) //lancet

	s2 := strutil.AfterLast("github.com/test/lancet", "/")
	fmt.Println(s2) //lancet

	s3 := strutil.AfterLast("github.com/test/test/lancet", "test")
	fmt.Println(s3) // /lancet
}

Before

返回源字符串中指定字符串第一次出现时的位置之前的子字符串

函数签名:

func Before(s, char string) string

例子:

import (
	"fmt"
	"github.com/duke-git/lancet/v2/strutil"
)

func main() {
	s1 := strutil.Before("lancet", "")
	fmt.Println(s1) //lancet

	s2 := strutil.Before("github.com/test/lancet", "/")
	fmt.Println(s2) //github.com

	s3 := strutil.Before("github.com/test/lancet", "test")
	fmt.Println(s3) // github.com/
}

BeforeLast

返回源字符串中指定字符串最后一次出现时的位置之前的子字符串

函数签名:

func BeforeLast(s, char string) string

例子:

import (
	"fmt"
	"github.com/duke-git/lancet/v2/strutil"
)

func main() {
	s1 := strutil.BeforeLast("lancet", "")
	fmt.Println(s1) //lancet

	s2 := strutil.BeforeLast("github.com/test/lancet", "/")
	fmt.Println(s2) //github.com/test

	s3 := strutil.BeforeLast("github.com/test/test/lancet", "test")
	fmt.Println(s3) //github.com/test/
}

CamelCase

将字符串转换为驼峰式字符串, 非字母和数字会被忽略

函数签名:

func CamelCase(s string) string

例子:

import (
	"fmt"
	"github.com/duke-git/lancet/v2/strutil"
)

func main() {
	s1 := strutil.CamelCase("foo_bar")
	fmt.Println(s1) //fooBar

	s2 := strutil.CamelCase("Foo-Bar")
	fmt.Println(s2) //fooBar

	s3 := strutil.CamelCase("Foo&bar")
	fmt.Println(s3) //fooBar

	s4 := strutil.CamelCase("foo bar")
	fmt.Println(s4) //fooBar

	s4 := strutil.CamelCase("Foo-#1😄$_%^&*(1bar")
	fmt.Println(s4) //foo11Bar
}

Capitalize

将字符串的第一个字符转换为大写

函数签名:

func Capitalize(s string) string

例子:

import (
	"fmt"
	"github.com/duke-git/lancet/v2/strutil"
)

func main() {
	s1 := strutil.Capitalize("foo")
	fmt.Println(s1) //foo

	s2 := strutil.Capitalize("Foo")
	fmt.Println(s2) //foo

	s3 := strutil.Capitalize("FOo"
	fmt.Println(s3) //fOo
}

IsString

判断传入参数的数据类型是否为字符串

函数签名:

func IsString(v any) bool

例子:

import (
	"fmt"
	"github.com/duke-git/lancet/v2/strutil"
)

func main() {
	fmt.Println(strutil.IsString("lancet")) //true
	fmt.Println(strutil.IsString("")) //true

	fmt.Println(strutil.IsString(1)) //false
	fmt.Println(strutil.IsString("")) //false
	fmt.Println(strutil.IsString([]string{})) //false
}

KebabCase

将字符串转换为kebab-case, 非字母和数字会被忽略

函数签名:

func KebabCase(s string) string

例子:

import (
	"fmt"
	"github.com/duke-git/lancet/v2/strutil"
)

func main() {
	s1 := strutil.KebabCase("Foo Bar-")
	fmt.Println(s1) //foo-bar

	s2 := strutil.KebabCase("foo_Bar")
	fmt.Println(s2) //foo-bar

	s3 := strutil.KebabCase("fooBar")
	fmt.Println(s3) //foo-bar

	s4 := strutil.KebabCase("__FOO_BAR__")
	fmt.Println(s4) //foo-bar
}

UpperKebabCase

将字符串转换为大写KEBAB-CASE, 非字母和数字会被忽略

函数签名:

func KebabCase(s string) string

例子:

import (
	"fmt"
	"github.com/duke-git/lancet/v2/strutil"
)

func main() {
	s1 := strutil.UpperKebabCase("Foo Bar-")
	fmt.Println(s1) //FOO-BAR

	s2 := strutil.UpperKebabCase("foo_Bar")
	fmt.Println(s2) //FOO-BAR

	s3 := strutil.UpperKebabCase("fooBar")
	fmt.Println(s3) //FOO-BAR

	s4 := strutil.UpperKebabCase("__FOO_BAR__")
	fmt.Println(s4) //FOO-BAR
}

LowerFirst

将字符串的第一个字符转换为小写

函数签名:

func LowerFirst(s string) string

例子:

import (
	"fmt"
	"github.com/duke-git/lancet/v2/strutil"
)

func main() {
	s1 := strutil.LowerFirst("foo")
	fmt.Println(s1) //foo

	s2 := strutil.LowerFirst("BAR")
	fmt.Println(s2) //bAR

	s3 := strutil.LowerFirst("FOo")
	fmt.Println(s3) //fOo

	s4 := strutil.LowerFirst("fOo大")
	fmt.Println(s4) //fOo大
}

UpperFirst

将字符串的第一个字符转换为大写形式

函数签名:

func UpperFirst(s string) string

例子:

import (
	"fmt"
	"github.com/duke-git/lancet/v2/strutil"
)

func main() {
	s1 := strutil.UpperFirst("foo")
	fmt.Println(s1) //Foo

	s2 := strutil.UpperFirst("bAR")
	fmt.Println(s2) //BAR

	s3 := strutil.UpperFirst("FOo")
	fmt.Println(s3) //FOo

	s4 := strutil.UpperFirst("fOo大")
	fmt.Println(s4) //FOo大
}

PadEnd

如果字符串长度短于size，则在右侧填充字符串

函数签名:

func PadEnd(source string, size int, padStr string) string

例子:

import (
	"fmt"
	"github.com/duke-git/lancet/v2/strutil"
)

func main() {
	s1 := strutil.PadEnd("a", 1, "b")
	fmt.Println(s1) //a

	s2 := strutil.PadEnd("a", 2, "b")
	fmt.Println(s2) //ab

	s3 := strutil.PadEnd("abcd", 6, "mno")
	fmt.Println(s3) //abcdmn

	s4 := strutil.PadEnd("abc", 6, "ab")
	fmt.Println(s4) //abcaba
}

PadStart

如果字符串长度短于size，则在左侧填充字符串

函数签名:

func PadStart(source string, size int, padStr string) string

例子:

import (
	"fmt"
	"github.com/duke-git/lancet/v2/strutil"
)

func main() {
	s1 := strutil.PadStart("a", 1, "b")
	fmt.Println(s1) //a

	s2 := strutil.PadStart("a", 2, "b")
	fmt.Println(s2) //ba

	s3 := strutil.PadStart("abcd", 6, "mno")
	fmt.Println(s3) //mnabcd

	s4 := strutil.PadStart("abc", 6, "ab")
	fmt.Println(s4) //abaabc
}

Reverse

返回字符顺序与给定字符串相反的字符串

函数签名:

func Reverse(s string) string

例子:

import (
	"fmt"
	"github.com/duke-git/lancet/v2/strutil"
)

func main() {
	s1 := strutil.ReverseStr("abc")
	fmt.Println(s1) //cba

	s2 := strutil.ReverseStr("12345")
	fmt.Println(s2) //54321
}

SnakeCase

将字符串转换为snake_case形式, 非字母和数字会被忽略

函数签名:

func SnakeCase(s string) string

例子:

import (
	"fmt"
	"github.com/duke-git/lancet/v2/strutil"
)

func main() {
	s1 := strutil.SnakeCase("Foo Bar-")
	fmt.Println(s1) //foo_bar

	s2 := strutil.SnakeCase("foo_Bar")
	fmt.Println(s2) //foo_bar

	s3 := strutil.SnakeCase("fooBar")
	fmt.Println(s3) //foo_bar

	s4 := strutil.SnakeCase("__FOO_BAR__")
	fmt.Println(s4) //foo_bar

	s5 := strutil.SnakeCase("Foo-#1😄$_%^&*(1bar")
	fmt.Println(s5) //foo_1_1_bar
}

UpperSnakeCase

将字符串转换为大写SNAKE_CASE形式, 非字母和数字会被忽略

函数签名:

func SnakeCase(s string) string

例子:

import (
	"fmt"
	"github.com/duke-git/lancet/v2/strutil"
)

func main() {
	s1 := strutil.UpperSnakeCase("Foo Bar-")
	fmt.Println(s1) //FOO_BAR

	s2 := strutil.UpperSnakeCase("foo_Bar")
	fmt.Println(s2) //FOO_BAR

	s3 := strutil.UpperSnakeCase("fooBar")
	fmt.Println(s3) //FOO_BAR

	s4 := strutil.UpperSnakeCase("__FOO_BAR__")
	fmt.Println(s4) //FOO_BAR

	s5 := strutil.UpperSnakeCase("Foo-#1😄$_%^&*(1bar")
	fmt.Println(s5) //FOO_1_1_BAR
}

SplitEx

分割字符串为切片，removeEmptyString参数指定是否去除空字符串

函数签名:

func SplitEx(s, sep string, removeEmptyString bool) []string

例子:

import (
	"fmt"
	"github.com/duke-git/lancet/v2/strutil"
)

func main() {
	arr1 := strutil.SplitEx(" a b c ", "", true)
	fmt.Println(arr1) //[]string{}

	arr2 := strutil.SplitEx(" a b c ", " ", false)
	fmt.Println(arr2) //[]string{"", "a", "b", "c", ""}

	arr3 := strutil.SplitEx(" a b c ", " ", true)
	fmt.Println(arr3) //[]string{"a", "b", "c"}

	arr4 := strutil.SplitEx(" a = b = c = ", " = ", false)
	fmt.Println(arr4) //[]string{" a", "b", "c", ""}

	arr5 := strutil.SplitEx(" a = b = c = ", " = ", true)
	fmt.Println(arr5) //[]string{" a", "b", "c"}
}

Substring

根据指定的位置和长度截取子字符串

函数签名:

func Substring(s string, offset int, length uint) string

例子:

import (
	"fmt"
	"github.com/duke-git/lancet/v2/strutil"
)

func main() {
	result1 := strutil.Substring("abcde", 1, 3)
	fmt.Println(result1) //bcd

	result2 := strutil.Substring("abcde", 1, 5)
	fmt.Println(result2) //bcde

	result3 := strutil.Substring("abcde", -1, 3)
	fmt.Println(result3) //e

	result4 := strutil.Substring("abcde", -2, 2)
	fmt.Println(result4) //de

	result5 := strutil.Substring("abcde", -2, 3)
	fmt.Println(result5) //de

	result6 := strutil.Substring("你好，欢迎你", 0, 2)
	fmt.Println(result6) //你好
}

Wrap

用另一个字符串包裹一个字符串

函数签名:

func Wrap(str string, wrapWith string) string

例子:

import (
	"fmt"
	"github.com/duke-git/lancet/v2/strutil"
)

func main() {
	s1 := strutil.Wrap("ab", "")
	fmt.Println(s1) //ab

	s2 := strutil.Wrap("", "*")
	fmt.Println(s2) //""

	s3 := strutil.Wrap("ab", "*")
	fmt.Println(s3) //*ab*

	s4 := strutil.Wrap("ab", "\"")
	fmt.Println(s4) //\"ab\"

	s5 := strutil.Wrap("ab", "'")
	fmt.Println(s5) //'ab'
}

Unwrap

用另一个字符串解开包裹一个字符串

函数签名:

func Unwrap(str string, wrapToken string) string

例子:

import (
	"fmt"
	"github.com/duke-git/lancet/v2/strutil"
)

func main() {
	s1 := strutil.Unwrap("ab", "")
	fmt.Println(s1) //ab

	s2 := strutil.Unwrap("ab", "*")
	fmt.Println(s2) //ab

	s3 := strutil.Unwrap("**ab**", "*")
	fmt.Println(s3) //*ab*

	s4 := strutil.Unwrap("*ab", "*")
	fmt.Println(s4) //*ab

	s5 := strutil.Unwrap("***", "**")
	fmt.Println(s5) //***
}

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Strutil

源码:

用法:

目录

Documentation文档

After

AfterLast

Before

BeforeLast

CamelCase

Capitalize

IsString

KebabCase

UpperKebabCase

LowerFirst

UpperFirst

PadEnd

PadStart

Reverse

SnakeCase

UpperSnakeCase

SplitEx

Substring

Wrap

Unwrap

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