# List
List 是线性表数据结构, 用 go 切片实现。
# 源码
# 用法
import (
"github.com/duke-git/lancet/v2/datastructure"
)
# 目录
# 文档
# NewList
返回List指针实例
函数签名:
type List[T any] struct {
data []T
}
func NewList[T any](data []T) *List[T]
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
li := list.NewList([]int{1, 2, 3})
fmt.Println(li)
}
# Contain
判断列表中是否包含特定值
函数签名:
func (l *List[T]) Contain(value T) bool
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
li := list.NewList([]int{1, 2, 3})
fmt.Println(li.Contain(1)) //true
fmt.Println(li.Contain(0)) //false
}
# Data
返回List中所有数据(切片)
函数签名:
func (l *List[T]) Data() []T
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
li := list.NewList([]int{1, 2, 3})
data := li.Data()
fmt.Println(data) //[]int{1, 2, 3}
}
# ValueOf
返回列表中索引处的值指针
函数签名:
func (l *List[T]) ValueOf(index int) (*T, bool)
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
li := list.NewList([]int{1, 2, 3})
v, ok := li.ValueOf(0)
fmt.Println(*v) //1
fmt.Println(ok) //true
}
# IndexOf
返回列表中值的索引,如果没有找到返回-1
函数签名:
func (l *List[T]) IndexOf(value T) int
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
li := list.NewList([]int{1, 2, 3})
fmt.Println(li.IndexOf(1)) //0
fmt.Println(li.IndexOf(0)) //-1
}
# LastIndexOf
返回列表中最后一次出现的值的索引。如果未找到,则返回-1
函数签名:
func (l *List[T]) LastIndexOf(value T) int
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
li := list.NewList([]int{1, 2, 3, 1})
fmt.Println(li.LastIndexOf(1)) // 3
fmt.Println(li.LastIndexOf(0)) //-1
}
# IndexOfFunc
返回第一个符合函数条件的元素的索引。如果未找到,则返回-1
函数签名:
func (l *List[T]) IndexOfFunc(f func(T) bool) int
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
li := list.NewList([]int{1, 2, 3})
fmt.Println(li.IndexOfFunc(func(a int) bool { return a == 1 })) //0
fmt.Println(li.IndexOfFunc(func(a int) bool { return a == 0 })) //-1
}
# LastIndexOfFunc
返回最后一个符合函数条件的元素的索引。如果未找到,则返回-1
函数签名:
func (l *List[T]) LastIndexOfFunc(f func(T) bool) int
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
li := list.NewList([]int{1, 2, 3, 1})
fmt.Println(li.LastIndexOfFunc(func(a int) bool { return a == 1 })) // 3
fmt.Println(li.LastIndexOfFunc(func(a int) bool { return a == 0 })) //-1
}
# Push
将值附加到列表末尾
函数签名:
func (l *List[T]) Push(value T)
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
li := list.NewList([]int{1, 2, 3})
li.Push(4)
fmt.Println(li.Data()) //[]int{1, 2, 3, 4}
}
# PopFirst
删除列表的第一个值并返回该值
函数签名:
func (l *List[T]) PopFirst() (*T, bool)
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
li := list.NewList([]int{1, 2, 3})
v, ok := li.PopFirst()
fmt.Println(*v) //1
fmt.Println(ok) //true
fmt.Println(li.Data()) //2, 3
}
# PopFirst
删除列表的最后一个值并返回该值
函数签名:
func (l *List[T]) PopLast() (*T, bool)
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
li := list.NewList([]int{1, 2, 3})
v, ok := li.PopLast()
fmt.Println(*v) //3
fmt.Println(ok) //true
fmt.Println(li.Data()) //1, 2
}
# DeleteAt
删除索引处列表的值,如果索引不在0和列表数据长度之间,则不执行任何操作
函数签名:
func (l *List[T]) DeleteAt(index int)
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
li := list.NewList([]int{1, 2, 3, 4})
li.DeleteAt(-1)
fmt.Println(li.Data()) //1,2,3,4
li.DeleteAt(4)
fmt.Println(li.Data()) //1,2,3,4
li.DeleteAt(0)
fmt.Println(li.Data()) //2,3,4
li.DeleteAt(2)
fmt.Println(li.Data()) //2,3
}
# InsertAt
在索引处插入值到列表中,如果索引不在 0 和列表数据长度之间,则不执行任何操作
函数签名:
func (l *List[T]) InsertAt(index int, value T)
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
li := list.NewList([]int{1, 2, 3})
li.InsertAt(-1, 0)
fmt.Println(li.Data()) //1,2,3
li.InsertAt(4, 0)
fmt.Println(li.Data()) //1,2,3
li.InsertAt(3, 4)
fmt.Println(li.Data()) //1,2,3,4
// li.InsertAt(2, 4)
// fmt.Println(li.Data()) //1,2,4,3
}
# UpdateAt
更新索引处列表的值,索引应该在0和列表数据长度-1之间
函数签名:
func (l *List[T]) UpdateAt(index int, value T)
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
li := list.NewList([]int{1, 2, 3})
li.UpdateAt(-1, 0)
fmt.Println(li.Data()) //1,2,3
li.UpdateAt(2, 4)
fmt.Println(li.Data()) //1,2,4
li.UpdateAt(3, 5)
fmt.Println(li.Data()) //1,2,4
}
# Equal
比较一个列表和另一个列表,在每个元素上使用 reflect.DeepEqual
函数签名:
func (l *List[T]) Equal(other *List[T]) bool
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
li1 := list.NewList([]int{1, 2, 3, 4})
li2 := list.NewList([]int{1, 2, 3, 4})
li3 := list.NewList([]int{1, 2, 3})
fmt.Println(li1.Equal(li2)) //true
fmt.Println(li1.Equal(li3)) //false
}
# IsEmpty
判断列表是否为空
函数签名:
func (l *List[T]) IsEmpty() bool
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
li1 := list.NewList([]int{1, 2, 3})
li2 := list.NewList([]int{})
fmt.Println(li1.IsEmpty()) //false
fmt.Println(li2.IsEmpty()) //true
}
# Clear
清空列表数据
函数签名:
func (l *List[T]) Clear()
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
li := list.NewList([]int{1, 2, 3})
li.Clear()
fmt.Println(li.Data()) // empty
}
# Clone
返回列表的一个拷贝
函数签名:
func (l *List[T]) Clone() *List[T]
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
li := list.NewList([]int{1, 2, 3})
cloneList := li.Clone()
fmt.Println(cloneList.Data()) // 1,2,3
}
# Merge
合并两个列表,返回新的列表
函数签名:
func (l *List[T]) Merge(other *List[T]) *List[T]
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
li1 := list.NewList([]int{1, 2, 3, 4})
li2 := list.NewList([]int{4, 5, 6})
li3 := li1.Merge(li2)
fmt.Println(li3.Data()) //1, 2, 3, 4, 4, 5, 6
}
# Size
返回列表数据项的数量
函数签名:
func (l *List[T]) Size() int
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
li := list.NewList([]int{1, 2, 3, 4})
fmt.Println(li.Size()) //4
}
# Cap
返回列表数据容量
函数签名:
func (l *List[T]) Cap() int
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
data := make([]int, 0, 100)
li := list.NewList(data)
fmt.Println(li.Cap()) // 100
}
# Swap
交换列表中两个索引位置的值
函数签名:
func (l *List[T]) Swap(i, j int)
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
li := list.NewList([]int{1, 2, 3, 4})
li.Swap(0, 3)
fmt.Println(li.Data()) //4, 2, 3, 1
}
# Reverse
反转列表的数据项顺序
函数签名:
func (l *List[T]) Reverse()
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
li := list.NewList([]int{1, 2, 3, 4})
li.Reverse()
fmt.Println(li.Data()) //4, 3, 2, 1
}
# Unique
列表去除重复数据项
函数签名:
func (l *List[T]) Unique()
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
li := list.NewList([]int{1, 2, 2, 3, 4})
li.Unique()
fmt.Println(li.Data()) //1,2,3,4
}
# Union
两个列表取并集,去除重复数据项
函数签名:
func (l *List[T]) Union(other *List[T]) *List[T]
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
li1 := list.NewList([]int{1, 2, 3, 4})
li2 := list.NewList([]int{4, 5, 6})
li3 := li1.Union(li2)
fmt.Println(li3.Data()) //1,2,3,4,5,6
}
# Intersection
两个列表取交集
函数签名:
func (l *List[T]) Intersection(other *List[T]) *List[T]
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
li1 := list.NewList([]int{1, 2, 3, 4})
li2 := list.NewList([]int{4, 5, 6})
li3 := li1.Intersection(li2)
fmt.Println(li3.Data()) //4
}
# SubList
SubList returns a sub list of the original list between the specified fromIndex, inclusive, and toIndex, exclusive.
函数签名:
func (l *List[T]) SubList(fromIndex, toIndex int) *List[T]
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
l := list.NewList([]int{1, 2, 3, 4, 5, 6})
fmt.Println(l.SubList(2, 5)) // []int{3, 4, 5}
}
# DeleteIf
删除列表中所有符合函数(调用函数返回true)的元素,返回删除元素的数量
函数签名:
func (l *List[T]) DeleteIf(f func(T) bool) int
例子:
package main
import (
"fmt"
list "github.com/duke-git/lancet/v2/datastructure/list"
)
func main() {
l := list.NewList([]int{1, 1, 1, 1, 2, 3, 1, 1, 4, 1, 1, 1, 1, 1, 1})
fmt.Println(l.DeleteIf(func(a int) bool { return a == 1 })) // 12
fmt.Println(l.Data()) // []int{2, 3, 4}
}
Linklist →