pugnack
1a1b67866a
* add usage docs for context types and metadata, improve comments * changes after review
38 lines
717 B
Go
38 lines
717 B
Go
package metadata
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import "sort"
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type Iterator struct {
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md Metadata
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keys []string
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cur int
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cnt int
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}
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// Next advances the iterator to the next element.
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func (iter *Iterator) Next(k *string, v *[]string) bool {
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if iter.cur+1 > iter.cnt {
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return false
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}
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if k != nil && v != nil {
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*k = iter.keys[iter.cur]
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vv := iter.md[*k]
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*v = make([]string, len(vv))
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copy(*v, vv)
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iter.cur++
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}
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return true
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}
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// Iterator returns an iterator for iterating over metadata in sorted order.
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func (md Metadata) Iterator() *Iterator {
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iter := &Iterator{md: md, cnt: len(md)}
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iter.keys = make([]string, 0, iter.cnt)
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for k := range md {
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iter.keys = append(iter.keys, k)
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}
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sort.Strings(iter.keys)
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return iter
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}
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