mirror of
https://github.com/luxfi/util.git
synced 2026-10-30 15:13:56 +00:00
zeekayandHanzo Dev
b45161c43f
These three sit in luxfi/node under utils/, and P-Chain and X-Chain reach for them. Both chains have to leave that repository before it can be archived, and a chain should not have to depend on a node to measure a quantity in nLUX, keep a heap, or walk a sequence. units imports nothing at all; heap wanted only Zero, which is already here; iterator wanted heap and Zero. Three of iterator's tests exercise it against platformvm's state iterators. They stay with the node, and travel with platformvm, because a generic sequence should not be tested through one virtual machine's idea of state. What remains here covers the package on its own terms. Co-authored-by: Hanzo Dev <[email protected]>
44 lines
904 B
Go
44 lines
904 B
Go
// Copyright (C) 2019-2025, Lux Industries Inc. All rights reserved.
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// See the file LICENSE for licensing terms.
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package iterator
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var _ Iterator[any] = (*slice[any])(nil)
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// ToSlice returns a slice that contains all of the elements from [it] in order.
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// [it] will be released before returning.
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func ToSlice[T any](it Iterator[T]) []T {
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defer it.Release()
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var elements []T
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for it.Next() {
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elements = append(elements, it.Value())
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}
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return elements
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}
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type slice[T any] struct {
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index int
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elements []T
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}
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// FromSlice returns an iterator that contains [elements] in order. Doesn't sort
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// by anything.
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func FromSlice[T any](elements ...T) Iterator[T] {
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return &slice[T]{
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index: -1,
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elements: elements,
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}
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}
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func (i *slice[_]) Next() bool {
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i.index++
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return i.index < len(i.elements)
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}
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func (i *slice[T]) Value() T {
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return i.elements[i.index]
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}
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func (*slice[_]) Release() {}
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