Created
October 26, 2022 04:48
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Like Java's 'computeIfAbsent'...
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| func GetOrSetDefault[K comparable, V any](m map[K]V, key K, new_ func() V) V { | |
| value, found := m[key] | |
| if !found { | |
| value = new_() | |
| m[key] = value | |
| } | |
| return value | |
| } | |
| /* | |
| a := make(map[int]string) | |
| GetOrSetDefault(a, 42, func() string { return "hi" }) | |
| fmt.Println(a[42]) // hi | |
| */ |
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