Avoid unnecessary Map.containsKey calls. #213
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Map.containsKey calls are often unnecessary. Depends on the code, we can: 1. call get() and then compare result with null. Applicable if we know that Map don't contain null value 2. use putIfAbsent()/computeIfAbsent() if containsKey() was used before put 3. use getOrDefault() if we have "fallback" value
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Map.containsKey calls are often unnecessary.
Depends on the code, we can:
I believe it simplifies code and makes it a bit faster.