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📁 ..	-	2024-02-02 18:09
📄 goerror_fp.go // Copyright 2022 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package goerror_fp type Seq[T any] []T func (r Seq[T]) Size() int { return len(r) } func (r Seq[T]) Append(items ...T) Seq[T] { tail := Seq[T](items) ret := make(Seq[T], r.Size()+tail.Size()) for i := range r { ret[i] = r[i] } for i := range tail { ret[i+r.Size()] = tail[i] } return ret } func (r Seq[T]) Iterator() Iterator[T] { idx := 0 return Iterator[T]{ IsHasNext: func() bool { return idx < r.Size() }, GetNext: func() T { ret := r[idx] idx++ return ret }, } } type Iterator[T any] struct { IsHasNext func() bool GetNext func() T } func (r Iterator[T]) ToSeq() Seq[T] { ret := Seq[T]{} for r.HasNext() { ret = append(ret, r.Next()) } return ret } func (r Iterator[T]) Map(f func(T) any) Iterator[any] { return MakeIterator(r.HasNext, func() any { return f(r.Next()) }) } func (r Iterator[T]) HasNext() bool { return r.IsHasNext() } func (r Iterator[T]) Next() T { return r.GetNext() } func MakeIterator[T any](has func() bool, next func() T) Iterator[T] { return Iterator[T]{ IsHasNext: has, GetNext: next, } }	1.22 KB	2024-02-02 18:09
📄 main.go package main import fp "./goerror_fp" func Fold[A, B any](zero B, a A, f func(B, A) B) B { return f(zero, a) } func main() { var v any = "hello" Fold(fp.Seq[any]{}, v, func(seq fp.Seq[any], v any) fp.Seq[any] { return seq.Append(v) }) }	248 B	2024-02-02 18:09

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