README
¶
Functools
Functools is a simple Golang library including some commonly used functional programming tools. Reference [roman-kachanovsky/go-built-in]
Features
- High level functions such as Apply/Reduce/Filter etc.
- Rust-style Option type
Install
go get github.com/pytool/functools
Usage
package main
import (
"log"
. "github.com/pytool/functools"
)
func PartialFun() {
sum := func(a, b int) int { return a * b }
sum10 := Partial(sum, 10)
result := sum10(10)
log.Println(result)
}
Partial 偏函数的功能就是：把一个函数的某些参数给固定住，返回一个新的函数
multiply(x, y)；
double = partial(multiply, y=2)；
double(3)
Apply/Map :对 sequence 中的 item 依次执行 function(item)，并将结果组成一个 List 返回
Reduce 先将 sequence 的前两个 item 传给 function，即 function(item1, item2)，函数的返回值和 sequence 的下一个 item 再传给 function，即 function(function(item1, item2), item3)，如此迭代，直到 sequence 没有元素，如果有 initial，则作为初始值调用。
reduece(f, [x1, x2, x3, x4]) = f(f(f(x1, x2), x3), x4)
Filter 将 function 依次作用于 sequnce 的每个 item，即 function(item)，将返回值为 True 的 item 组成一个 List 返回。 Zip 将两个一维的Slice合并成一个二维的Slice
All 必须所有的元素都为真 bool：true int:!0 Any 只要有一个元素为真 Cmp 比较两个元素的大小，结果为int8 [> 1] [= 0] [< -1] ToBool 将元素转换成Bool类型
Sum 计算数值型元素的总和 Avg 计算数值型元素的平均值 Max 计算数值型元素的最大值 Min 计算数值型元素的最小值
Documentation
¶
Index ¶
- func All(slice interface{}) bool
- func AllFunc(function, slice interface{}) bool
- func AllFuncSafe(function, slice interface{}) (result bool, err error)
- func AllSafe(slice interface{}) (result bool, err error)
- func Any(slice interface{}) bool
- func AnyFunc(function, slice interface{}) bool
- func AnyFuncSafe(function, slice interface{}) (result bool, err error)
- func AnySafe(slice interface{}) (result bool, err error)
- func Apply(function, slice interface{}) interface{}
- func ApplySafe(function, slice interface{}) (result interface{}, err error)
- func Avg(slice interface{}) float64
- func AvgSafe(slice interface{}) (result float64, err error)
- func Cmp(a, b interface{}) int8
- func CmpSafe(a, b interface{}) (result int8, err error)
- func Compose(functions ...interface{}) func(...interface{}) interface{}
- func ComposeSafe(functions ...interface{}) (result func(...interface{}) interface{}, err error)
- func Filter(slice interface{}) interface{}
- func FilterFunc(function, slice interface{}) interface{}
- func FilterFuncSafe(function, slice interface{}) (result interface{}, err error)
- func FilterSafe(slice interface{}) (result interface{}, err error)
- func Map(function, slice interface{}) interface{}
- func MapSafe(function, slice interface{}) (result interface{}, err error)
- func Max(slice interface{}) interface{}
- func MaxSafe(slice interface{}) (result interface{}, err error)
- func Min(slice interface{}) interface{}
- func MinSafe(slice interface{}) (result interface{}, err error)
- func Partial(function interface{}, args ...interface{}) func(...interface{}) interface{}
- func PartialSafe(function interface{}, args ...interface{}) (result func(...interface{}) interface{}, err error)
- func Reduce(function, slice, acc interface{}) interface{}
- func ReduceSafe(function, slice, acc interface{}) (result interface{}, err error)
- func Sum(slice interface{}) interface{}
- func SumSafe(slice interface{}) (result interface{}, err error)
- func ToBool(value interface{}) bool
- func ToBoolSafe(value interface{}) (result bool, err error)
- func Zip(slices ...interface{}) interface{}
- func ZipSafe(slices ...interface{}) (result interface{}, err error)
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func AllFuncSafe ¶
func AnyFuncSafe ¶
func Apply ¶
func Apply(function, slice interface{}) interface{}
'Map' applies 'func' to every item of iterable 'slice' and return a slice of the results. Function allowes slices and arrays.
Map(func, slice) slice MapSafe(func, slice) (slice, err)
func ComposeSafe ¶
func ComposeSafe(functions ...interface{}) (result func(...interface{}) interface{}, err error)
func FilterFunc ¶
func FilterFunc(function, slice interface{}) interface{}
func FilterFuncSafe ¶
func FilterFuncSafe(function, slice interface{}) (result interface{}, err error)
func FilterSafe ¶
func FilterSafe(slice interface{}) (result interface{}, err error)
func Partial ¶
func Partial(function interface{}, args ...interface{}) func(...interface{}) interface{}
func PartialSafe ¶
func PartialSafe(function interface{}, args ...interface{}) (result func(...interface{}) interface{}, err error)
func ReduceSafe ¶
func ReduceSafe(function, slice, acc interface{}) (result interface{}, err error)
func ToBoolSafe ¶
Types ¶
This section is empty.
Source Files
Directories