< > BotCompany Repo | #1025566 // getOrCreate_allowNull - map lookup or create from function, also cache null values

JavaX fragment (include) [tags: use-pretranspiled]

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static <A, B> B getOrCreate_allowNull(Map<A, B> map, A key, IF0<B> f) ctex {
  synchronized(map) { // avoid race condition
    if (map.containsKey(key)) ret map.get(key);
  }
  B b = f!;
  map.put(key, b);
  ret b;
}

Author comment

Began life as a copy of #1013935

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