fp

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Version: v0.11.1 Latest Latest
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Published: Sep 6, 2022 License: MIT Imports: 0 Imported by: 2

README

fp-go

Go Reference Go Report codecov

Fp-go is a collection of Functional Programming helpers powered by Golang 1.18+ generics.

Inspired by

Contents

Install

Requires go 1.18+

go get github.com/repeale/fp-go

Features

Currying

By default! Data last!

func isPositive(x int) bool {
	return x > 0
}

func main() {
    filterPositive := fp.Filter(isPositive)
    numbers := []int{1, 2, 3, 4, 5}

    positives := filterPositive(numbers)
}
Variations

Variations allows you to get different parameters in the callback function so that you get only only what is really needed.

Default
WithIndex
WithSlice

Default

Only the current item is available:

fp.Map[int, string](func(x int) { ... })
WithIndex

Current element and index are available:

fp.MapWithIndex[int, string](func(x int, i int) { ... })
WithSlice

Current element, index and the whole slice are available:

fp.MapWithSlice[int, string](func(x int, i int, xs: []int) { ... })

Helpers

Every

Determines whether all the members of an array satisfy the specified test.

Variations EveryWithIndex and EveryWithSlice

fp.Every(func(x int) bool { return x > 0 })([]int{1, 2, 3})

// => true
Filter

Returns the elements of an array that meet the condition specified in a callback function.

Variations FilterWithIndex and FilterWithSlice

fp.Filter(func(x int) bool { return x > 0 })([]int{-1, 2, -3, 4})

// => []int{2, 4}
Flat

Returns a new array with all sub-array elements concatenated into it.

fp.Flat([][]int{{1, 2}, {3, 4}})

// => []int{1, 2, 3, 4}
FlatMap

Calls a defined callback function on each element of an array. Then, flattens the result into a new array. This is identical to a map followed by flat.

Variations FlatMapWithIndex and FlatMapWithSlice

fp.FlatMap(func(x int) []int { return []int{x, x} })([]int{1, 2})

// => []int{1, 1, 2, 2}
Map

Calls a defined callback function on each element of an array, and returns an array that contains the results.

Variations MapWithIndex and MapWithSlice

fp.Map(func(x int64) string {
    return strconv.FormatInt(x, 10)
})([]int64{1, 2, 3})

// => []string{"1", "2", "3", "4"}
Reduce

Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.

Variations ReduceWithIndex and ReduceWithSlice

fp.Reduce(func(acc int, curr int) int { return acc + curr }, 0)([]int{1, 2, 3})

// => 6
Some

Determines whether the specified callback function returns true for any element of an array.

Variations SomeWithIndex and SomeWithSlice

fp.Some(func(x int) bool { return x < 0 })([]int{1, 2, 3})

// => false

Compose

Performs right-to-left function composition.

Variations Compose2 to Compose16 stating the number of functions you are going to compose.

func isPositive(x int) bool {
	return x > 0
}

func sumTwo(x int) int {
	return x + 2
}

Compose2(fp.Filter(isPositive), fp.Map(sumTwo))([]int{1, 2, 3, -1})

// => []int{3,4,5,1}
Pipe

Performs left-to-right function composition.

Variations Pipe2 to Pipe16 stating the number of functions you are going to compose.

func isPositive(x int) bool {
	return x > 0
}

func sumTwo(x int) int {
	return x + 2
}

Pipe2(fp.Filter(isPositive), fp.Map(sumTwo))([]int{1, 2, 3, -1})

// => []int{3,4,5}
Curry

Allow to transfrom a function that receives a certain amount of params in single functions that take one single param each.

Variations Curry2 to Curry16 stating the number of params will be curried individually.

curryedSum := Curry2(func(a int, b int) int { return a + b })
curryedSum(1)(2)

Structs

Option

Option represents encapsulation of an optional value, it might be used as the return type of functions which may or may not return a meaningful value when they are applied.

Option exports Some, None, IsSome, IsNone, Chain, Exists, Flatten, FromError, FromErrorFn, FromPredicate, GetOrElse, Map, Match.

Either

Either represent a value that can have two possible types. It is common to see Either used to represent a success value Right or a failure value Left, although that doesn't have to be the case. An instance of Either is either an instance of Left or Right.

Either exports Left, Right, IsLeft, IsRight, Exists, Flatten, FromError, FromErrorFn, FromOption, FromPredicate, GetOrElse, Map, MapLeft, Match,

Documentation

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func Compose10 added in v0.8.0

func Compose10[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, R any](fn10 func(T10) R, fn9 func(T9) T10, fn8 func(T8) T9, fn7 func(T7) T8, fn6 func(T6) T7, fn5 func(T5) T6, fn4 func(T4) T5, fn3 func(T3) T4, fn2 func(T2) T3, fn1 func(T1) T2) func(T1) R

Performs right-to-left function composition of 10 functions

func Compose11 added in v0.8.0

func Compose11[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, R any](fn11 func(T11) R, fn10 func(T10) T11, fn9 func(T9) T10, fn8 func(T8) T9, fn7 func(T7) T8, fn6 func(T6) T7, fn5 func(T5) T6, fn4 func(T4) T5, fn3 func(T3) T4, fn2 func(T2) T3, fn1 func(T1) T2) func(T1) R

Performs right-to-left function composition of 11 functions

func Compose12 added in v0.8.0

func Compose12[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, R any](fn12 func(T12) R, fn11 func(T11) T12, fn10 func(T10) T11, fn9 func(T9) T10, fn8 func(T8) T9, fn7 func(T7) T8, fn6 func(T6) T7, fn5 func(T5) T6, fn4 func(T4) T5, fn3 func(T3) T4, fn2 func(T2) T3, fn1 func(T1) T2) func(T1) R

Performs right-to-left function composition of 12 functions

func Compose13 added in v0.8.0

func Compose13[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, R any](fn13 func(T13) R, fn12 func(T12) T13, fn11 func(T11) T12, fn10 func(T10) T11, fn9 func(T9) T10, fn8 func(T8) T9, fn7 func(T7) T8, fn6 func(T6) T7, fn5 func(T5) T6, fn4 func(T4) T5, fn3 func(T3) T4, fn2 func(T2) T3, fn1 func(T1) T2) func(T1) R

Performs right-to-left function composition of 13 functions

func Compose14 added in v0.8.0

func Compose14[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, R any](fn14 func(T14) R, fn13 func(T13) T14, fn12 func(T12) T13, fn11 func(T11) T12, fn10 func(T10) T11, fn9 func(T9) T10, fn8 func(T8) T9, fn7 func(T7) T8, fn6 func(T6) T7, fn5 func(T5) T6, fn4 func(T4) T5, fn3 func(T3) T4, fn2 func(T2) T3, fn1 func(T1) T2) func(T1) R

Performs right-to-left function composition of 14 functions

func Compose15 added in v0.8.0

func Compose15[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, R any](fn15 func(T15) R, fn14 func(T14) T15, fn13 func(T13) T14, fn12 func(T12) T13, fn11 func(T11) T12, fn10 func(T10) T11, fn9 func(T9) T10, fn8 func(T8) T9, fn7 func(T7) T8, fn6 func(T6) T7, fn5 func(T5) T6, fn4 func(T4) T5, fn3 func(T3) T4, fn2 func(T2) T3, fn1 func(T1) T2) func(T1) R

Performs right-to-left function composition of 15 functions

func Compose16 added in v0.8.0

func Compose16[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, R any](fn16 func(T16) R, fn15 func(T15) T16, fn14 func(T14) T15, fn13 func(T13) T14, fn12 func(T12) T13, fn11 func(T11) T12, fn10 func(T10) T11, fn9 func(T9) T10, fn8 func(T8) T9, fn7 func(T7) T8, fn6 func(T6) T7, fn5 func(T5) T6, fn4 func(T4) T5, fn3 func(T3) T4, fn2 func(T2) T3, fn1 func(T1) T2) func(T1) R

Performs right-to-left function composition of 16 functions

func Compose2 added in v0.5.0

func Compose2[T1, T2, R any](fn2 func(T2) R, fn1 func(T1) T2) func(T1) R

Performs right-to-left function composition of two functions

func Compose3 added in v0.5.0

func Compose3[T1, T2, T3, R any](fn3 func(T3) R, fn2 func(T2) T3, fn1 func(T1) T2) func(T1) R

Performs right-to-left function composition of three functions

func Compose4 added in v0.5.0

func Compose4[T1, T2, T3, T4, R any](fn4 func(T4) R, fn3 func(T3) T4, fn2 func(T2) T3, fn1 func(T1) T2) func(T1) R

Performs right-to-left function composition of four functions

func Compose5 added in v0.8.0

func Compose5[T1, T2, T3, T4, T5, R any](fn5 func(T5) R, fn4 func(T4) T5, fn3 func(T3) T4, fn2 func(T2) T3, fn1 func(T1) T2) func(T1) R

Performs right-to-left function composition of 5 functions

func Compose6 added in v0.8.0

func Compose6[T1, T2, T3, T4, T5, T6, R any](fn6 func(T6) R, fn5 func(T5) T6, fn4 func(T4) T5, fn3 func(T3) T4, fn2 func(T2) T3, fn1 func(T1) T2) func(T1) R

Performs right-to-left function composition of 6 functions

func Compose7 added in v0.8.0

func Compose7[T1, T2, T3, T4, T5, T6, T7, R any](fn7 func(T7) R, fn6 func(T6) T7, fn5 func(T5) T6, fn4 func(T4) T5, fn3 func(T3) T4, fn2 func(T2) T3, fn1 func(T1) T2) func(T1) R

Performs right-to-left function composition of 7 functions

func Compose8 added in v0.8.0

func Compose8[T1, T2, T3, T4, T5, T6, T7, T8, R any](fn8 func(T8) R, fn7 func(T7) T8, fn6 func(T6) T7, fn5 func(T5) T6, fn4 func(T4) T5, fn3 func(T3) T4, fn2 func(T2) T3, fn1 func(T1) T2) func(T1) R

Performs right-to-left function composition of 8 functions

func Compose9 added in v0.8.0

func Compose9[T1, T2, T3, T4, T5, T6, T7, T8, T9, R any](fn9 func(T9) R, fn8 func(T8) T9, fn7 func(T7) T8, fn6 func(T6) T7, fn5 func(T5) T6, fn4 func(T4) T5, fn3 func(T3) T4, fn2 func(T2) T3, fn1 func(T1) T2) func(T1) R

Performs right-to-left function composition of 9 functions

func Curry10 added in v0.9.0

func Curry10[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, R any](fn func(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10) R) func(T1) func(T2) func(T3) func(T4) func(T5) func(T6) func(T7) func(T8) func(T9) func(T10) R

Allow to transform a function that receives 10 params in a sequence of unary functions

func Curry11 added in v0.9.0

func Curry11[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, R any](fn func(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11) R) func(T1) func(T2) func(T3) func(T4) func(T5) func(T6) func(T7) func(T8) func(T9) func(T10) func(T11) R

Allow to transform a function that receives 11 params in a sequence of unary functions

func Curry12 added in v0.9.0

func Curry12[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, R any](fn func(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12) R) func(T1) func(T2) func(T3) func(T4) func(T5) func(T6) func(T7) func(T8) func(T9) func(T10) func(T11) func(T12) R

Allow to transform a function that receives 12 params in a sequence of unary functions

func Curry13 added in v0.9.0

func Curry13[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, R any](fn func(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13) R) func(T1) func(T2) func(T3) func(T4) func(T5) func(T6) func(T7) func(T8) func(T9) func(T10) func(T11) func(T12) func(T13) R

Allow to transform a function that receives 13 params in a sequence of unary functions

func Curry14 added in v0.9.0

func Curry14[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, R any](fn func(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14) R) func(T1) func(T2) func(T3) func(T4) func(T5) func(T6) func(T7) func(T8) func(T9) func(T10) func(T11) func(T12) func(T13) func(T14) R

Allow to transform a function that receives 14 params in a sequence of unary functions

func Curry15 added in v0.9.0

func Curry15[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, R any](fn func(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15) R) func(T1) func(T2) func(T3) func(T4) func(T5) func(T6) func(T7) func(T8) func(T9) func(T10) func(T11) func(T12) func(T13) func(T14) func(T15) R

Allow to transform a function that receives 15 params in a sequence of unary functions

func Curry16 added in v0.9.0

func Curry16[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, R any](fn func(T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16) R) func(T1) func(T2) func(T3) func(T4) func(T5) func(T6) func(T7) func(T8) func(T9) func(T10) func(T11) func(T12) func(T13) func(T14) func(T15) func(T16) R

Allow to transform a function that receives 16 params in a sequence of unary functions

func Curry2 added in v0.5.0

func Curry2[T1, T2, R any](fn func(T1, T2) R) func(T1) func(T2) R

Allow to transform a function that receives 2 params in a sequence of unary functions

func Curry3 added in v0.5.0

func Curry3[T1, T2, T3, R any](fn func(T1, T2, T3) R) func(T1) func(T2) func(T3) R

Allow to transform a function that receives 3 params in a sequence of unary functions

func Curry4 added in v0.5.0

func Curry4[T1, T2, T3, T4, R any](fn func(T1, T2, T3, T4) R) func(T1) func(T2) func(T3) func(T4) R

Allow to transform a function that receives 4 params in a sequence of unary functions

func Curry5 added in v0.9.0

func Curry5[T1, T2, T3, T4, T5, R any](fn func(T1, T2, T3, T4, T5) R) func(T1) func(T2) func(T3) func(T4) func(T5) R

Allow to transform a function that receives 5 params in a sequence of unary functions

func Curry6 added in v0.9.0

func Curry6[T1, T2, T3, T4, T5, T6, R any](fn func(T1, T2, T3, T4, T5, T6) R) func(T1) func(T2) func(T3) func(T4) func(T5) func(T6) R

Allow to transform a function that receives 6 params in a sequence of unary functions

func Curry7 added in v0.9.0

func Curry7[T1, T2, T3, T4, T5, T6, T7, R any](fn func(T1, T2, T3, T4, T5, T6, T7) R) func(T1) func(T2) func(T3) func(T4) func(T5) func(T6) func(T7) R

Allow to transform a function that receives 7 params in a sequence of unary functions

func Curry8 added in v0.9.0

func Curry8[T1, T2, T3, T4, T5, T6, T7, T8, R any](fn func(T1, T2, T3, T4, T5, T6, T7, T8) R) func(T1) func(T2) func(T3) func(T4) func(T5) func(T6) func(T7) func(T8) R

Allow to transform a function that receives 8 params in a sequence of unary functions

func Curry9 added in v0.9.0

func Curry9[T1, T2, T3, T4, T5, T6, T7, T8, T9, R any](fn func(T1, T2, T3, T4, T5, T6, T7, T8, T9) R) func(T1) func(T2) func(T3) func(T4) func(T5) func(T6) func(T7) func(T8) func(T9) R

Allow to transform a function that receives 9 params in a sequence of unary functions

func Every added in v0.3.0

func Every[T any](predicate func(T) bool) func([]T) bool

Determines whether all the members of an array satisfy the specified test.

func EveryWithIndex added in v0.3.0

func EveryWithIndex[T any](predicate func(T, int) bool) func([]T) bool

See Every but callback receives index of element.

func EveryWithSlice added in v0.3.0

func EveryWithSlice[T any](predicate func(T, int, []T) bool) func([]T) bool

Like Every but callback receives index of element and the whole array.

func Filter added in v0.2.0

func Filter[T any](predicate func(T) bool) func([]T) []T

Returns the elements of an array that meet the condition specified in a callback function.

func FilterWithIndex added in v0.3.0

func FilterWithIndex[T any](predicate func(T, int) bool) func([]T) []T

See Filter but callback receives index of element.

func FilterWithSlice added in v0.3.0

func FilterWithSlice[T any](predicate func(T, int, []T) bool) func([]T) []T

Like Filter but callback receives index of element and the whole array.

func Flat added in v0.3.0

func Flat[T any](xs [][]T) []T

Returns a new array with all sub-array elements concatenated into it recursively up to the specified depth.

func FlatMap added in v0.3.0

func FlatMap[T any, R any](callback func(T) []R) func([]T) []R

Calls a defined callback function on each element of an array. Then, flattens the result into a new array. This is identical to a map followed by flat with depth 1.

func FlatMapWithIndex added in v0.3.0

func FlatMapWithIndex[T any, R any](callback func(T, int) []R) func([]T) []R

See FlatMap but callback receives index of element.

func FlatMapWithSlice added in v0.3.0

func FlatMapWithSlice[T any, R any](callback func(T, int, []T) []R) func([]T) []R

Like FlatMap but callback receives index of element and the whole array.

func Map

func Map[T any, R any](callback func(T) R) func([]T) []R

Calls a defined callback function on each element of an array, and returns an array that contains the results.

func MapWithIndex added in v0.3.0

func MapWithIndex[T any, R any](callback func(T, int) R) func([]T) []R

See Map but callback receives index of element.

func MapWithSlice added in v0.3.0

func MapWithSlice[T any, R any](callback func(T, int, []T) R) func([]T) []R

Like Map but callback receives index of element and the whole array.

func Pipe10 added in v0.8.0

func Pipe10[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, R any](fn1 func(T1) T2, fn2 func(T2) T3, fn3 func(T3) T4, fn4 func(T4) T5, fn5 func(T5) T6, fn6 func(T6) T7, fn7 func(T7) T8, fn8 func(T8) T9, fn9 func(T9) T10, fn10 func(T10) R) func(T1) R

Performs left-to-right function composition of 10 functions

func Pipe11 added in v0.8.0

func Pipe11[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, R any](fn1 func(T1) T2, fn2 func(T2) T3, fn3 func(T3) T4, fn4 func(T4) T5, fn5 func(T5) T6, fn6 func(T6) T7, fn7 func(T7) T8, fn8 func(T8) T9, fn9 func(T9) T10, fn10 func(T10) T11, fn11 func(T11) R) func(T1) R

Performs left-to-right function composition of 11 functions

func Pipe12 added in v0.8.0

func Pipe12[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, R any](fn1 func(T1) T2, fn2 func(T2) T3, fn3 func(T3) T4, fn4 func(T4) T5, fn5 func(T5) T6, fn6 func(T6) T7, fn7 func(T7) T8, fn8 func(T8) T9, fn9 func(T9) T10, fn10 func(T10) T11, fn11 func(T11) T12, fn12 func(T12) R) func(T1) R

Performs left-to-right function composition of 12 functions

func Pipe13 added in v0.8.0

func Pipe13[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, R any](fn1 func(T1) T2, fn2 func(T2) T3, fn3 func(T3) T4, fn4 func(T4) T5, fn5 func(T5) T6, fn6 func(T6) T7, fn7 func(T7) T8, fn8 func(T8) T9, fn9 func(T9) T10, fn10 func(T10) T11, fn11 func(T11) T12, fn12 func(T12) T13, fn13 func(T13) R) func(T1) R

Performs left-to-right function composition of 13 functions

func Pipe14 added in v0.8.0

func Pipe14[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, R any](fn1 func(T1) T2, fn2 func(T2) T3, fn3 func(T3) T4, fn4 func(T4) T5, fn5 func(T5) T6, fn6 func(T6) T7, fn7 func(T7) T8, fn8 func(T8) T9, fn9 func(T9) T10, fn10 func(T10) T11, fn11 func(T11) T12, fn12 func(T12) T13, fn13 func(T13) T14, fn14 func(T14) R) func(T1) R

Performs left-to-right function composition of 14 functions

func Pipe15 added in v0.8.0

func Pipe15[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, R any](fn1 func(T1) T2, fn2 func(T2) T3, fn3 func(T3) T4, fn4 func(T4) T5, fn5 func(T5) T6, fn6 func(T6) T7, fn7 func(T7) T8, fn8 func(T8) T9, fn9 func(T9) T10, fn10 func(T10) T11, fn11 func(T11) T12, fn12 func(T12) T13, fn13 func(T13) T14, fn14 func(T14) T15, fn15 func(T15) R) func(T1) R

Performs left-to-right function composition of 15 functions

func Pipe16 added in v0.8.0

func Pipe16[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, R any](fn1 func(T1) T2, fn2 func(T2) T3, fn3 func(T3) T4, fn4 func(T4) T5, fn5 func(T5) T6, fn6 func(T6) T7, fn7 func(T7) T8, fn8 func(T8) T9, fn9 func(T9) T10, fn10 func(T10) T11, fn11 func(T11) T12, fn12 func(T12) T13, fn13 func(T13) T14, fn14 func(T14) T15, fn15 func(T15) T16, fn16 func(T16) R) func(T1) R

Performs left-to-right function composition of 16 functions

func Pipe2 added in v0.5.0

func Pipe2[T1, T2, R any](fn1 func(T1) T2, fn2 func(T2) R) func(T1) R

Performs left-to-right function composition of two functions

func Pipe3 added in v0.5.0

func Pipe3[T1, T2, T3, R any](fn1 func(T1) T2, fn2 func(T2) T3, fn3 func(T3) R) func(T1) R

Performs left-to-right function composition of three functions

func Pipe4 added in v0.5.0

func Pipe4[T1, T2, T3, T4, R any](fn1 func(T1) T2, fn2 func(T2) T3, fn3 func(T3) T4, fn4 func(T4) R) func(T1) R

Performs left-to-right function composition of four functions

func Pipe5 added in v0.8.0

func Pipe5[T1, T2, T3, T4, T5, R any](fn1 func(T1) T2, fn2 func(T2) T3, fn3 func(T3) T4, fn4 func(T4) T5, fn5 func(T5) R) func(T1) R

Performs left-to-right function composition of five functions

func Pipe6 added in v0.8.0

func Pipe6[T1, T2, T3, T4, T5, T6, R any](fn1 func(T1) T2, fn2 func(T2) T3, fn3 func(T3) T4, fn4 func(T4) T5, fn5 func(T5) T6, fn6 func(T6) R) func(T1) R

Performs left-to-right function composition of 6 functions

func Pipe7 added in v0.8.0

func Pipe7[T1, T2, T3, T4, T5, T6, T7, R any](fn1 func(T1) T2, fn2 func(T2) T3, fn3 func(T3) T4, fn4 func(T4) T5, fn5 func(T5) T6, fn6 func(T6) T7, fn7 func(T7) R) func(T1) R

Performs left-to-right function composition of 7 functions

func Pipe8 added in v0.8.0

func Pipe8[T1, T2, T3, T4, T5, T6, T7, T8, R any](fn1 func(T1) T2, fn2 func(T2) T3, fn3 func(T3) T4, fn4 func(T4) T5, fn5 func(T5) T6, fn6 func(T6) T7, fn7 func(T7) T8, fn8 func(T8) R) func(T1) R

Performs left-to-right function composition of 8 functions

func Pipe9 added in v0.8.0

func Pipe9[T1, T2, T3, T4, T5, T6, T7, T8, T9, R any](fn1 func(T1) T2, fn2 func(T2) T3, fn3 func(T3) T4, fn4 func(T4) T5, fn5 func(T5) T6, fn6 func(T6) T7, fn7 func(T7) T8, fn8 func(T8) T9, fn9 func(T9) R) func(T1) R

Performs left-to-right function composition of 9 functions

func Reduce added in v0.3.0

func Reduce[T any, R any](callback func(R, T) R, acc R) func([]T) R

Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.

func ReduceWithIndex added in v0.3.0

func ReduceWithIndex[T any, R any](callback func(R, T, int) R, acc R) func([]T) R

See Reduce but callback receives index of element.

func ReduceWithSlice added in v0.3.0

func ReduceWithSlice[T any, R any](callback func(R, T, int, []T) R, acc R) func([]T) R

Like Reduce but callback receives index of element and the whole array.

func Some added in v0.3.0

func Some[T any](predicate func(T) bool) func([]T) bool

Determines whether the specified callback function returns true for any element of an array.

func SomeWithIndex added in v0.3.0

func SomeWithIndex[T any](predicate func(T, int) bool) func([]T) bool

See Some but callback receives index of element.

func SomeWithSlice added in v0.3.0

func SomeWithSlice[T any](predicate func(T, int, []T) bool) func([]T) bool

Like Some but callback receives index of element and the whole array.

Types

type Lazy added in v0.6.0

type Lazy[T any] func() T

Callback function that returns a specific value type

type LazyVal added in v0.6.0

type LazyVal[T any] func(x T) T

Callback function that takes an argument and return a value of the same type

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