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gitea/modules/container/filter.go
oliverpool d547b53cca
Add container.FilterSlice function ()
Many places have the following logic:
```go
func (jobs ActionJobList) GetRunIDs() []int64 {
	ids := make(container.Set[int64], len(jobs))
	for _, j := range jobs {
		if j.RunID == 0 {
			continue
		}
		ids.Add(j.RunID)
	}
	return ids.Values()
}
```

this introduces a `container.FilterMapUnique` function, which reduces
the code above to:
```go
func (jobs ActionJobList) GetRunIDs() []int64 {
	return container.FilterMapUnique(jobs, func(j *ActionRunJob) (int64, bool) {
		return j.RunID, j.RunID != 0
	})
}
```
2024-04-09 20:27:30 +08:00

22 lines
679 B
Go

// Copyright 2024 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package container
import "slices"
// FilterSlice ranges over the slice and calls include() for each element.
// If the second returned value is true, the first returned value will be included in the resulting
// slice (after deduplication).
func FilterSlice[E any, T comparable](s []E, include func(E) (T, bool)) []T {
filtered := make([]T, 0, len(s)) // slice will be clipped before returning
seen := make(map[T]bool, len(s))
for i := range s {
if v, ok := include(s[i]); ok && !seen[v] {
filtered = append(filtered, v)
seen[v] = true
}
}
return slices.Clip(filtered)
}