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33 lines
505 B
Go
33 lines
505 B
Go
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package shared
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import "sync"
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func ForEach[T any](arr []T, numThreads int, fn func(T) error) error {
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wg := &sync.WaitGroup{}
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wg.Add(len(arr))
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limiter := make(chan bool, numThreads)
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var errors []error
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for _, item := range arr {
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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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if len(errors) > 0 {
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return errors[0]
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}
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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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