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28 lines
467 B
Go
28 lines
467 B
Go
package shared
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import "sync"
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func ForEach[T any](iter Seq1[T], numThreads int, fn func(T) error) error {
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wg := &sync.WaitGroup{}
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limiter := make(chan bool, numThreads)
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var errors []error
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iter(func(item T) bool {
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wg.Add(1)
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limiter <- true
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go func(x T) {
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defer wg.Done()
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err := fn(x)
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if err != nil {
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errors = append(errors, err)
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}
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<-limiter
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}(item)
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return true
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})
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wg.Wait()
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if len(errors) > 0 {
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return errors[0]
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}
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return nil
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}
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