safe navigation operator

名词 n.

英文释义

名词 n.
  1. A binary operator that returns its second argument, unless the first argument is null, in which case it returns null; used to simplify code that would otherwise need multiple explicit checks for nullity.
    — One operator I haven't talked about yet is the safe navigation operator (?.). By preceding a dot with a question mark, you can safely navigate to methods or properties of an object even if that object is null.

词形变化

safe navigation operators plural
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