collection

README

collection

基于泛型的集合操作，可以多补充些

Each

仅作用于基础类型指针类型的数据集

type Book struct {
    Name  string
    Price int
}
books := []*Book{
    &{Name: "a", Price: 2},
    &{Name: "b", Price: 3},
    &{Name: "c", Price: 4},
}
collection.New(books).Each(func(b *Book){
    b.Price = b.Price + 1
}).Value()

Map

比较万能

bookss := []Book{
    {Name: "a", Price: 2},
    {Name: "b", Price: 3},
    {Name: "c", Price: 4},
}
bbbss := collection.New(bookss).Map(func(b Book) Book {
    b.Price = b.Price + 1
    return b
}).Filter(func(i Book) bool {
    return i.Price >= 3
}).Value()

for _, b := range bbbss {
    fmt.Println(b.Price) // 3，4，5
}

Filter

books := []*Book{
    {Name: "a", Price: 2},
    {Name: "b", Price: 3},
    {Name: "c", Price: 4},
}
bb := collection.New(books).Each(func(b *Book) {
    b.Price = b.Price + 1
}).Filter(func(i *Book) bool {
    return i.Price >= 4
}).Value()

for _, b := range bb {
    fmt.Println(b.Name) // 3，4
}

Documentation

Overview

Package collection provide a collection type that can set generics type for any type or any pointer

Index

• type Collection
  • func New[T item](d []T) *Collection[T]
  • func (c *Collection[T]) Each(f func(i T)) *Collection[T]
  • func (c *Collection[T]) Filter(f func(i T) bool) *Collection[T]
  • func (c *Collection[T]) Len() int
  • func (c *Collection[T]) Map(f func(i T) T) *Collection[T]
  • func (c *Collection[T]) Merge(other *Collection[T])
  • func (c *Collection[T]) Peek(i int) T
  • func (c *Collection[T]) Sort(f func(i, j T) bool) *Collection[T]
  • func (c *Collection[T]) Value() []T

Types

type Collection

type Collection[T item] struct {
	// contains filtered or unexported fields
}

Collection can set generics for any type or any pointer you must choose using pointer or not

func New

func New[T item](d []T) *Collection[T]

New can be used to create a new collection you can use collection.New([]string{"a", "b", "c"}) or collection.New([]int{1, 2, 3}) or collection.New([]Book{{Name: "a", Price: 2}, {Name: "b", Price: 3}, {Name: "c", Price: 4}}) or collection.New([]*Book{{Name: "a", Price: 2}, {Name: "b", Price: 3}, {Name: "c", Price: 4}})

func (*Collection[T]) Each

func (c *Collection[T]) Each(f func(i T)) *Collection[T]

Each can be used to iterate over the collection

func (*Collection[T]) Filter

func (c *Collection[T]) Filter(f func(i T) bool) *Collection[T]

Filter can be used to filter the collection only when the function returns true

func (*Collection[T]) Len

func (c *Collection[T]) Len() int

Len can be used to get the length

func (*Collection[T]) Map

func (c *Collection[T]) Map(f func(i T) T) *Collection[T]

Map can be used to map the collection

func (*Collection[T]) Merge

func (c *Collection[T]) Merge(other *Collection[T])

Merge can be used to merge two collections

func (*Collection[T]) Peek

func (c *Collection[T]) Peek(i int) T

Peek can be used to get the value

func (*Collection[T]) Sort

func (c *Collection[T]) Sort(f func(i, j T) bool) *Collection[T]

Sort sorts the elements in the Collection using the provided function.

func (*Collection[T]) Value

func (c *Collection[T]) Value() []T

Value can be used to get the value slice