< > BotCompany Repo | #1010780 // mapPutIfChange2 - put into map if key & value are not null & there is some change; return previous value if change

JavaX fragment (include)

static <A, B> B mapPutIfChange2(Map<A, B> map, A key, B value) {
  if (map != null && key != null && value != null && neq(map.get(key), value))
    ret map.put(key, value);
  null;
}

Author comment

Began life as a copy of #1008061

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