31 lines
648 B
Go
31 lines
648 B
Go
package momap
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func FromSliceGroups[T any, K comparable](ts []T, fn func(t T) K) map[K][]T {
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kvs := make(map[K][]T)
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for _, t := range ts {
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k := fn(t)
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kvs[k] = append(kvs[k], t)
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}
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return kvs
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}
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func FromSlice[T any, K comparable, V any](ts []T, fn func(t T) (K, V)) map[K]V {
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m, _ := FromSliceWithError(ts, func(t T) (k K, v V, _ error) {
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k, v = fn(t)
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return k, v, nil
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})
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return m
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}
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func FromSliceWithError[T any, K comparable, V any](ts []T, fn func(t T) (K, V, error)) (map[K]V, error) {
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kvs := make(map[K]V)
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for _, t := range ts {
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k, v, err := fn(t)
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if err != nil {
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return nil, err
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}
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kvs[k] = v
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}
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return kvs, nil
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}
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