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fix: add prepend method

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Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com>
This commit is contained in:
Dr. Carsten Leue
2023-12-21 16:46:47 +01:00
parent 12ef79184b
commit 973138c822
4 changed files with 53 additions and 10 deletions
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23
array/array.go
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@@ -17,6 +17,7 @@ package array
import (
G "github.com/IBM/fp-go/array/generic"
EM "github.com/IBM/fp-go/endomorphism"
F "github.com/IBM/fp-go/function"
"github.com/IBM/fp-go/internal/array"
M "github.com/IBM/fp-go/monoid"
@@ -89,16 +90,16 @@ func filterMapRef[A, B any](fa []A, pred func(a *A) bool, f func(a *A) B) []B {
}
// Filter returns a new array with all elements from the original array that match a predicate
func Filter[A any](pred func(A) bool) func([]A) []A {
func Filter[A any](pred func(A) bool) EM.Endomorphism[[]A] {
return G.Filter[[]A](pred)
}
// FilterWithIndex returns a new array with all elements from the original array that match a predicate
func FilterWithIndex[A any](pred func(int, A) bool) func([]A) []A {
func FilterWithIndex[A any](pred func(int, A) bool) EM.Endomorphism[[]A] {
return G.FilterWithIndex[[]A](pred)
}
func FilterRef[A any](pred func(*A) bool) func([]A) []A {
func FilterRef[A any](pred func(*A) bool) EM.Endomorphism[[]A] {
return F.Bind2nd(filterRef[A], pred)
}
@@ -227,7 +228,7 @@ func Last[A any](as []A) O.Option[A] {
return G.Last(as)
}
func PrependAll[A any](middle A) func([]A) []A {
func PrependAll[A any](middle A) EM.Endomorphism[[]A] {
return func(as []A) []A {
count := len(as)
dst := count * 2
@@ -242,7 +243,7 @@ func PrependAll[A any](middle A) func([]A) []A {
}
}
func Intersperse[A any](middle A) func([]A) []A {
func Intersperse[A any](middle A) EM.Endomorphism[[]A] {
prepend := PrependAll(middle)
return func(as []A) []A {
if IsEmpty(as) {
@@ -271,7 +272,7 @@ func Lookup[A any](idx int) func([]A) O.Option[A] {
return G.Lookup[[]A](idx)
}
func UpsertAt[A any](a A) func([]A) []A {
func UpsertAt[A any](a A) EM.Endomorphism[[]A] {
return G.UpsertAt[[]A](a)
}
@@ -304,7 +305,7 @@ func ConstNil[A any]() []A {
return array.ConstNil[[]A]()
}
func SliceRight[A any](start int) func([]A) []A {
func SliceRight[A any](start int) EM.Endomorphism[[]A] {
return G.SliceRight[[]A](start)
}
@@ -333,8 +334,8 @@ func Fold[A any](m M.Monoid[A]) func([]A) A {
return G.Fold[[]A](m)
}
func Push[A any](a A) func([]A) []A {
return G.Push[[]A](a)
func Push[A any](a A) EM.Endomorphism[[]A] {
return G.Push[EM.Endomorphism[[]A]](a)
}
func MonadFlap[B, A any](fab []func(A) B, a A) []B {
@@ -344,3 +345,7 @@ func MonadFlap[B, A any](fab []func(A) B, a A) []B {
func Flap[B, A any](a A) func([]func(A) B) []B {
return G.Flap[func(A) B, []func(A) B, []B, A, B](a)
}
func Prepend[A any](head A) EM.Endomorphism[[]A] {
return G.Prepend[EM.Endomorphism[[]A]](head)
}